Bleed the air, and the batteries are cold - the solution to the problem

When cold weather sets in, heating devices should be turned on in every house or apartment.

And if we are talking about central heating or an existing private boiler with a water heater mechanism and installed radiators, then a natural question arises of how to make the batteries warm.

Sometimes it is not enough just to turn on the heating and the boiler in the house, because there are a large number of problems and nuances that prevent the batteries from becoming warm.

The metal remains cold until the problem of all supplied heat or a single criterion is eliminated.

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Why are the batteries in the apartment not warming up well?

Reason 1: air locks

Often the batteries in the apartment are cold or not warm enough due to air congestion. As a rule, such a problem is relevant for residents of the upper floors, since the air tends upward through the pipes. In order to eliminate air congestion, a Mayevsky crane is used. It allows you to release the collected air and ensure full circulation of the coolant in the pipes.

Reason 2: suboptimal connection of heating batteries

The first sign of improper connection is uneven heating of the battery. The radiator will not heat up strongly enough if the water supply is from the bottom. It is best in this case to change the connection diagram from side or bottom to diagonal.

Reason 3: a large number of radiator sections

Uneven and weak heating of the radiator may be the result of too many sections. It is best to avoid installing the battery in more than 12 sections.

Reason 4: low coolant temperature

Sometimes the batteries remain cold in winter due to the low temperature of the coolant (water) itself. In this case, you must contact the house management.

Air lock in the battery

The latest models of heating radiators are equipped with a special valve when installed, which allows you to bleed air from the system. The crane is called "Mayevsky crane". It has a small, 2mm air bleed hole. The tap is usually installed at the top of the radiator, since air usually accumulates in that sector of the battery. By turning the tap clockwise, a certain hiss will follow. As soon as water begins to ooze, the tap should be closed. For more confidence, some users continue to operate the tap, as a small part of the air comes out with the water. Perhaps this is both right and wrong at the same time.

On the one hand, a very small part of the air can actually escape through the faucet along with the water. However, on the other hand, the amount of air can be so insignificant that keeping the valve open for a long time will only reduce the proportion of the coolant and no more. It will be much more effective to re-release air after a short time interval.

However, it often happens that there is an old cast-iron battery, which in ancient times was not equipped with a crane. Unfortunately, this was the case throughout the Soviet era. Then you should bleed the air through the connection in the pipe that fits the radiator or the connection between the pipes. The algorithm of actions is somewhat more complicated and the work itself is not pleasant, since, most likely, a certain amount of coolant will be spilled.

What you need to do: Find a sleeve connection.It must be remembered that the thread can be both left and right and it is advisable not to apply huge efforts so as not to damage the pipe. Since such systems are quite old, under load, thread breakage or, even worse, breakage often occurs. So, you should be on the safe side - a rag, a bucket or a basin and an assistant is nearby. Suddenly the irreparable happens and the pipe simply breaks off the thread, then there will be a lot of water, and then there will also be troubles.

When turning the clutch, you need to do it smoothly and slowly. As soon as a characteristic sound is heard - air starts to come out - the action should be stopped. After waiting for the appearance of the water exit from the system, the coupling is twisted back. Very often, when a long-term connection is broken, water oozes in this place. Therefore, you can additionally wind flax on the thread before twisting. Several turns of flax and oiling it with grease allow you to make the connection almost flawlessly.

It may happen that it is the last radiator that does not heat, and it is from it that the pipe goes, which leads to the expansion tank. Then it is quite possible that there is a blockage in the part of the pipe-battery connection or the pipe and the expansion tank. Cleaning should be done, but this is a rather laborious process. So you have to make sure that this is the problem. To do this, you need to check the patency of the pipes.

If the reason was airing, then it has already been solved - you can enjoy the warmth. If after this there were no changes, then we look for the reason further.

Why do the batteries in a private house not warm up well?

Just as in the case of a high-rise building, there may be several reasons for the poor performance of heating batteries in a private house.

Reason 1: problems in the hydraulics of the heating system

The most common reason batteries stay cold is due to the hydraulics in the heating system. In this case, one of the heating branches is working properly, and the other is intermittent. This is typical for a new heating system or when adding radiators to an existing one. If the hydraulics are incorrectly calculated, and in particular the diameters and lengths of the pipes, some of the batteries may simply not heat up. The hydraulics can be adjusted using special taps.

Reason 2: one-pipe heating system

Many private houses have one-pipe heating systems. In such a system, batteries that are often remote from the boiler heat up much worse than those close to them. This does not mean that there are problems, this is a feature of the operation of a one-pipe system. The only solution here may be only to replace the system with a two-pipe one.

Reason 3: boiler malfunction

The batteries may not warm up due to malfunctions in the operation of boilers with built-in automation, pumps and sensors, which is a typical problem for autonomous heating systems. In this case, it is necessary to contact directly a specialist working with such equipment.

Why the battery does not warm up in a private house

In the private sector, in addition to the above reasons for the unsatisfactory performance of heating, there are others. Private houses have almost 100% autonomous heating. The heating boiler may be the cause of poor heating. Most likely, the boiler power is calculated incorrectly, it is not enough to heat the coolant to an acceptable temperature. If the automatic boiler does not turn off, this is a sure sign of insufficient power.

If the boiler is running, the liquid will still warm up. When the radiators are completely cold, the heating unit has broken down or does not turn on. Modern boilers are switched on while observing the minimum pressure level in the system. The boiler will not turn on if it is less. Also, modern boilers are equipped with a security system. For example, in a gas boiler there is a sensor that is responsible for ensuring that the exhaust gases go into the chimney.If for some reason the smoke does not go away completely, the automatic system will work, the boiler will turn off and will not turn on until the problems are eliminated.

What other reasons are there why the battery in the house does not heat up? The pressure in the system may be too low and, as a result, circulation is impaired. If the batteries are old, such a reason is unlikely, because two atmospheres (the usual pressure of a home system) are quite enough for them. Some modern batteries, however, require a higher pressure. Before installing them, it is worth looking at the passport if the system can create the required pressure.

You can slightly increase the pressure in the system by installing a circulation pump that matches the capacity of the system.

Since heating in private houses is often done by people who are illiterate in this regard, installation errors are possible, which will cause the heating to be weak. It is believed that the use of a one-pipe system saves pipes, but due to the peculiarities of the system, the heating of the batteries weakens as they move away from the boiler or they remain completely cold. In addition, batteries remote from the boiler should have more sections. It is impossible to save money.

In a private house, a two-pipe system is much more efficient, but during its installation errors are possible, which will affect the heating efficiency. These errors include:

improper installation of valves;
incorrectly connected batteries;
the diameters of the pipes were chosen randomly.

With such errors, effective circulation is not ensured, the heating battery does not warm up. There is only one way out - to invite a specialist and eliminate errors. And in order not to pay twice, initially entrust such a responsible work to a proven qualified specialist.

Many problems can be avoided by doing a few things first. Autonomous heating of a private house has an expansion tank for the system. If you weld a tap to the lower pipe and gradually supply water to it, the air lock will go out through the tank. Through the same tap, the system is filled with water, then plugs will not appear. The only thing that is required is an assistant to monitor the water level in the tank.

To remove air from cast-iron batteries, install a Mayevsky tap on the upper plug. This is not difficult at all, you just need to unscrew the plug in the summer, drill a hole of the required diameter in the center and cut the thread with the required pitch. The plugs are made of cast iron, the material is easy to process.

If the battery does not give off heat well for no apparent reason, it may be touching the wall. The larger the contact area, the more heat is lost uselessly. Eliminate the touch by moving the heatsink back slightly. Do not cover the batteries with decorative grilles that reduce heat dissipation. Better to attach a reflective foil shield behind the radiator - heat transfer will increase.

The heating system seems simple only at first glance, in fact, it has its own secrets and tricks. Everything seems complicated and confusing for a beginner. But once you understand the issue, the main points become clear.

It happens that the heating system malfunctions, and a situation arises - the boiler is working, and all the batteries, or at least some of them, are cold. Let's consider a dozen reasons for this state of affairs, how to fix breakdowns on our own, without involving ...

Automated boilers make it easier

If the boiler is automated, gas or electric, then, as a rule, the automation will not allow the coolant to overheat in the boiler itself, when the supply to the batteries for some reason stops. The protections will turn off the device, show an error code, then you need to draw conclusions from this information.
Breakdown of the boiler itself is eliminated by service. It is not recommended to open complex equipment on your own.

Cold radiators, when an automated boiler is running, may appear not only due to a breakdown of complex equipment, but also because ... (the most common reasons).

Air locks in radiators and on U-shaped elevations of the pipeline. Release the air with Mayevsky's taps. Install air vents, if not, convert the system to "normal".
Clogging of the filter, silting of the lower section of the pipes. Check the return filter at the boiler inlet.

Wrong system

For example, in a passing scheme, if the installation rules are violated, the middle radiators in the ring may turn out to be cold when the boiler is running. Eliminated by balancing or remounting.
The following is also possible:

The valves are closed - check the valves, including the tuning, balancing ones, which regulated the flow along separate dead-end branches, to individual radiators.
A sequential scheme for connecting the batteries was used, in which the last radiators along the pipe are always colder or do not heat at all ... Alter, apply modern schemes.
Various complex switching on of radiators, "where everything is confused." To alter the use of conventional two-pipe heating systems - dead-end, passing, radial with the presence of balancing cranes ...

Piping problems

Polypropylene pipes can create a surprise. When they are welded, the internal gaps are not controlled. The installer does not guarantee anything. It is not uncommon for the boiler to heat up, and the polypropylene system does not work normally, some of the batteries are for some reason colder, some are turned off ... First of all, start soldering and finding a bottleneck. Or replace the pipes with more reliable ones.

In any system, there is debris in the coolant. If there are U-shaped slopes in the lines, there may be a blockage.
Maybe just old steel pipes? Their service life is limited, from the inside they are overgrown with deposits and heating stops.

In systems without automation

There is a threat of a serious accident, destruction of the boiler if it is working and the batteries are cold. In a solid fuel heat generator, in the presence of fuel combustion, the liquid in the heat exchanger will boil very quickly if there is no circulation and heat removal, i.e. if the heating system remains cold.
This is not an acceptable situation, which is warned by the installation of an uninterruptible power supply for the circulation pump. And also by regularly checking the filter.

First of all, in such systems, the operation of the circulation pump is checked, which is often located on the return flow near the boiler.

Complex systems - what is the solution

Now more and more complex heating systems. Such a layout of the pipeline of a private house can be divided into several independent circuits, each of which has its own circulation pump. For example: - house radiators, underfloor heating in the house, indirect heating boiler, greenhouse, garage and workshop, outbuilding, separately - attic.
It is not uncommon for this to be connected to a couple of working boilers (the backup does not count).

In order for a complex circuit to work stably, all these circuits must be connected to some kind of distributor, which would provide them with the same initial stable pressure, regardless of the operation of adjacent circuits. In complex systems (more than 4 circuits), this is done using a hydraulic arrow or a primary circulation ring of pipes.

An illiterate project or installation under such circumstances leads to the fact that when the boiler is operating, some of the pipelines and batteries remain cold. Those. one circuit affects the other. The way out is to create a competent scheme.

Situations in apartments

Everything is easier in apartments with central heating. The heating circuit there is not complicated - one or more radiators are connected in parallel to the risers.

If the riser is cold, it means that the air has not been vented at the top, or the distribution along the risers has not been adjusted. In any case, you need to appeal to someone to bleed and regulate ...
If the riser is hot, and the edge of the battery is cold, then there can be two reasons - airing the battery, and you need to bleed the air yourself. Or - a small pressure on the riser - you need to understand as in the previous paragraph.
In apartments, a common problem is also clogging, overgrowth of old cast-iron radiators. It also happens that it's time to change them for new ones, otherwise nothing will help ...

Eliminating cold batteries as described above, for all reasons, of course requires some skill. If it does not work out on your own, then you need to call specialists. You should be especially careful with the battery plugs in apartments, since any violation of the system threatens an accident, boiling water, flooding of apartments ....

What if the bottom of the battery is colder than the top?

If the battery is hot at the top and cold at the bottom, then it is not functioning properly. In this case, diagnostics is required not only by the battery itself, but also by the entire heating system. The cause of the problem may lie in recent work on the heating system and changing the radiator. As a rule, the problem "hot top - cold bottom" appears due to the occurrence of an air lock (99% of cases), clogging of the radiator valve (a consequence of improper system start-up).

This problem is solved in two ways. You can remove the airlock using a Mayevsky crane or a descender. First of all, shut off the coolant supply to the radiator and leave the return flow open. Open the drain, wait for the air to escape, close the drain and open the coolant supply. This is usually enough.

In the event that this method did not work, and we are talking about an apartment building, it is better to call a specialist. There is another option for private houses. First you need to turn off the heating supply, open the drain at the highest point of the system and squeeze out all the air with back pressure.

Each heating system can have its own characteristics, and therefore the likelihood of atypical problems is high. These include improperly selected pipe diameters, incorrect distribution of the coolant, poor flow capacity, lack of pressure, malfunctions in the circulation pump or expansion tank. In any case, only a specialist can fully understand all the nuances, therefore, in case of difficulties in solving a problem, it is better to seek help.

Why don't the batteries in a private house heat up?

Malfunctions in the heating system in a private house can also be associated with a blockage or an airlock. True, the likelihood of such troubles in the autonomous heating system of a private house is much less. Oxygen in the system and, accordingly, rust can appear only if the owners have drained the water for the summer. The most common cause of malfunctions in an autonomous heating system is the incorrect calculation of hydraulics, that is, the diameter and length of the pipes. The hydraulics can be adjusted through the control valves.

Another possible cause of trouble is the features of a one-pipe heating system. Here the point is not in any malfunctions, but in the principles of operation of such a system. The closer the batteries are to the boiler, the better they heat, that is, the last battery can be very cold.

Also, the problem may be associated with malfunctions in the operation of the automatic equipment of the gas boiler. Modern boilers are rather complicated, so it is better to consult a specialist to adjust the operation of the boiler.

Why is the last battery cold in a private house. Why cold batteries

Airlock. If there is a valve then open and release the bubbles. In new batteries, valves are usually installed. You can knock on the pipes and shake them so that air comes out. He can push through the pump. And it will heat up faster the first time you turn it on.

If it is clogged, then knock on the pipe, especially at the junction with the main pipe and supply and return.

on Saturday I did it in 3 rooms and a kitchen .. everything went to

400HP, these are batteries + work

in corner apartments, an additional radiator is always placed on the end wall, I myself live on the first, but not in the corner when I bought the apartment, there were double radiators since the construction of the house, initially I changed them "according to my mind." that is, I made a project. They came to me and figured out which ones to buy. Well, they are so thick and long. heat normally))) so that according to the law, everything is possible, as I wrote.

the cost of batteries, spare parts (spare parts for about 15 lats (if copper)) + 25 for work + 10 for shutdown and all this for one battery, if you want 2 multiplied by 2 everything took 3 hours

Call your friends. The person exhales almost 37 degrees. What is not a heater

You asked it all the same. No, the fact that I will now see what is happening behind the battery will not make me feel warmer!

cold water is rigas udens. call them, they will send plumbers and tell them what to do

the flow temperature is regulated by the automation in your heating unit. total - either the heating curve is incorrectly set, or the outside temperature sensor does not work correctly, or the two-way controller is buggy. contact the house manager

Or someone at home secretly installed batteries of undesignated capacity, with a large margin. Because of what he has Tashkent at home, and the rest in the house are freezing at 15-18 degrees

Causes of heating problems

First you need to make sure that the heating is really given, and the heat carrier of the required temperature is supplied to the heating system of the apartment. In the absence of problems with the central network, among the reasons for cold radiators are:

the presence of air congestion in the system;
clogged batteries;
incorrect connection of elements of the heating network.

In each situation, a certain amount of work will need to be done to get cold radiators hot.

Air congestion

The most common cause of heating irregularities is air locks, which are formed due to leakage, rapid filling of the system or as a result of water heating. They appear especially often in apartments on the upper floors.

In order for cold radiators to become hot, air must be removed from the system. Modern models are equipped with special vent valves located at the top of the batteries and operate in automatic mode. Also, a Mayevsky or drain valve can be installed on the radiators, with the help of which the air is manually eliminated.

The Mayevsky valve is a cone-shaped threaded rod, when unscrewed, a through hole opens and the gaseous medium is removed from the coolant.

What to do if they are absent? If heating was given, and the batteries remained cold, you should contact the management company or the housing office and call a plumber to remove air from the system. Usually, a preventive check is carried out after the coolant is supplied to the system in order to exclude its uneven heating.

There is an airlock in the battery

If the batteries at home do not heat or heat poorly - the most obvious problem is an airlock in the battery. An air lock can prevent the normal circulation of the coolant in the system, which leads to cooling of the radiators.

Today with new systems, everything is much simpler, because they are equipped with a special tap through which you can bleed air. Usually the faucet is installed on the top of the battery, or you need to turn it with a screwdriver, or, if you have a special adapter, just by hand. In this case, a hiss will follow - if there is still air in the system. If there is no air, the coolant, water, will immediately begin to flow out. If the second option means the problem is not in the airlock and you need to look for another reason.

Do not keep the tap open for too long. After letting in too much coolant, your heating system may suffer a pressure loss and the boiler will stop altogether. So it is better to repeat the procedure after a while until there is definitely no air in the system. Then the process of work should be normalized and the batteries will warm up.

Worse if you have an old cast iron radiator, because most likely it is not equipped with a drain valve. Well, if you made repairs and changed at least the supply pipe, in this case, you can bleed the air through a new tap, but if not, then everything is a little more complicated and most likely you will have to get dirty. If there is an air lock in the cast-iron battery, then you need to find a connection in the pipe, on the way to the battery, which is connected by a coupling and turn it. Yes, most likely a dirty coolant will stain your floor or clothes, but the heating system will work clearly more fun. It is IMPORTANT not to use unnecessary effort, because the thread can twist off in different directions and it is important not to rip it off, because then everything will be much worse and you will definitely have to call a plumber to solve the problem. the fact that you can flood the neighbors from below. So at your own peril and risk, unscrew the coupling very smoothly, or still call a plumber. As soon as you hear a hiss, stop twisting, release the air, and as soon as the water starts, twist back. Quite a frequent occurrence when you break the ancient pipe connections, then water oozes from them, so before winding back, you can use tow or fumlent. I hope everything goes well and you will enjoy the warm battery. If not, then read on, perhaps the problem is as follows.

Connection errors

Another reason why they can stay cold is incorrect connection of the heating system elements. The grossest mistake is considered to be the connection of radiators with pipes, in which the water is supplied from below. In this case, the sections heat up unevenly, and part of it remains cold. This is most often the case for lateral connections. What to do to ensure that the surface of the radiators is heated evenly and the apartment becomes warm? To do this, you need to correctly connect them to the system.

Too many sections can also contribute to uneven heating, since the circulation of the coolant is difficult. A special extension cord connected to a pipe that supplies hot water to the battery will help to improve it.

Advice! For uniform heating of radiators, the best option is a diagonal connection, which ensures maximum efficiency of the heating system.

Clogged system

There are not so many reasons when this happens. It is possible that the radiator does not heat up, because the blockage occurred due to the old age of the system. Over the decades of operation, rust appeared on the inner surface of the pipe walls, which accumulated and, as a result, blocked access to the coolant supply. In this case, you need to clean the radiator or completely replace it.

To do this, using a bypass, the flow of water or antifreeze into the radiator is shut off, but the system remains in working order. If a complete replacement is carried out, then everything is clear with this moment. If you only need to do with cleaning, then it is better to use some useful tips:

Clogged heating system

Batteries are often cold due to deposits on the inner walls of the case. The reason for their appearance is various impurities in the composition of the coolant and the products of the interaction of hot water and metal. What to do in this case?

Cleaning of radiators in an apartment is performed in several ways, each of which requires certain equipment and performance conditions.

If at the inlet and outlet of the coolant, then it can be done even with the heating system running.For this, the radiator is removed and the impurities are washed off with a strong stream of water. In case of failure, the sediment from the walls of the housing is removed using chemicals. After drying, the heater is installed in its place, and the joints are carefully sealed.

It is possible to remove deposits from the walls of the batteries without removing them. This is done using special equipment using the following methods:

Chemical. It is carried out using solutions of organic and mineral acids, alkali and other compounds. It is produced using special equipment, consisting of a pump, a container for a cleaning liquid and hoses. The method is irreplaceable for steel pipes.
Hydropneumatic. Used with equipment that can generate high pressure. Water serves as a cleaning fluid, due to which turbulent flows are formed, destroying deposits on the walls of pipes and radiators.
Hydrodynamic. It is carried out with a jet of water under high pressure, the supply of liquid to hard-to-reach places is provided by various nozzles. The cleaning method is effective for cast iron heating elements and is very expensive.
Pneumohydropulse. It is used for batteries and pipes, the diameter of which is no more than 150 mm. Deposits are removed with a water-powered pneumatic gun, which can act as a point.

As a result of a careful study of the causes of uneven heating and its competent elimination, cold radiators will become hot, and the living quarters will have a comfortable temperature.

After putting the central heating system into operation, it takes some time for it to enter the mode.

Incorrect connection - the reason why batteries do not heat up in a private house

There are many wrong designsdue to which the system may not work properly. As a result - barely warm or even cold batteries.

Let's analyze the main mistakes and oversights:

The very first reason is the incorrect position of the valve on the bypass. What is Bypass? This is a piece of pipe that connects the “supply” and “return” before entering the battery. Its constructive essence is to shut off the supply water to the battery, so that the battery can be easily removed and mounted back. So, if the bypass is open, then the circulation of the coolant will occur through it, as through the shortest path, bypassing the battery and, as a result, inoperative batteries.

Illiterate installation of the heating system. Of course, you can outline the features of a well-mounted heating system in general terms, but this is a whole science.

Even incorrect selection of the pipe diameter or an incorrect combination of the type of batteries and the heating boiler can lead to permanent malfunctions.

Oftentimes, poorly heating batteries can be caused simply by their characteristics. It is very difficult to say which radiators are of high quality and which ones are not, therefore, read the forum, communicate with trusted consultants and do not let “sell” you low-quality products.

What to do if the apartment is cold?

If at the beginning or the height of the heating season, one battery in the apartment or the entire circuit does not work, you need to contact the organization dealing with the heating of the house for help. To do this, it is enough to carefully read the settlement receipt. It comes monthly. It without fail indicates:

the address of the heat supply organization;
hotline or emergency telephone number;
if possible - the address of the organization's website.

Using this data, it is easy to contact specialists and ask them for help if they have provided heat and the batteries are cold.

Try to let the air out, maybe the reason is in it.

How soon should the issue of heating the house be resolved?

According to the current legislation, the problem associated with an insufficient level of heating at home should be resolved in the following terms:

within 16 hours, if the air temperature in the room is within + 12 ° C;
after 4 hours, if the air in the apartment warms up to + 10 ° C.

For each hour exceeding the specified limit, the payment for the provided heat should be reduced by 10-15%, according to the current tariff. This applies to those cases when the batteries in the apartment are not completely heated. What if the radiators remain cold in a separate room or separate wiring? If either heats up, but by half, then there will be no reduction in payment for the services provided. But at the same moment, the consumer has the right to call a specialist from the service organization so that he can fix the breakdown.

Before the arrival of a specialist, it is necessary to establish that only one of the rooms has a cold battery or the problem extends to the entire apartment, or maybe to the entire riser or staircase. The collected information will help the plumber quickly navigate on the spot and quickly fix the breakdown.

Causes of cold batteries in a private house

Now let's figure out why the boiler works and heats up, and the batteries are cold (Where can I go about cold batteries?)?

1. Cold batteries in the house may be due to insufficient boiler power. That is, it turns out that the gas boiler is working, but the batteries are cold and the last battery is cold in a closed system. It happens that in one of the rooms there is a cold battery. In this case, the device does not turn off, and the resource is not enough to heat all the liquid in the circuit. With this option, the batteries may heat up a little, and if they are absolutely cold, it means that the gas boiler has broken down and the batteries have become cold, or it has completely turned off (the automation and security system has worked). For example, in a gas boiler there are sensors for monitoring gas into the chimney, if the gas outlet began to occur incorrectly (the chimney is clogged), then the system blocks the operation of the boiler and will not allow it to turn on.

2. Another reason why the last battery is cold in a private house may be malfunctions in the heating circuit:

Air congestion. Then air release is required from all radiators in the house. It is possible to install automatic air vents at difficult high points. Air should not be constantly formed, if this happens, then it comes from somewhere, most likely from the well to the make-up valve. If you bleed the air from the battery, and it is cold, then this malfunction can cause serious damage to the boiler or the heating system will clog.
Pollution. In this case, it is necessary to flush the system, i.e. drain the water through the radiator until it is clear. If this works, then it will become clear why the boiler is working and the batteries are cold and why the last battery is cold.
Insufficient pressure. Disturbance of circulation in batteries or in the coolant itself. Typically, the operating pressure of the coolant is no more than 2 atm., For modern radiators this figure may be higher.
Incorrect piping. This is a common problem with boilers ariston kares 24sf, when it works, and the batteries are cold and electrolux boilers, when they quickly gain temperature, and the batteries are cold. Due to improper pipe routing, the circulation of the coolant in the heater itself is disturbed.

So that the apartment is always warm ...

Many ordinary people wonder if. First of all, you need to notify the company that provides the house with heat. It is her specialists who are obliged to repair the heating circuit as soon as possible. In some cases, a reversal of utility bills is carried out.

Radiators in the house can be cold due to airing of the system, accumulation of dirt in it, low heat carrier consumption, improper installation of the heating circuit.Only a specialist can correctly establish the nature of the breakdown, and therefore correctly eliminate it. It is prohibited to carry out any adjustment work independently. The question is disclosed in more detail in the video:

A cold heating radiator at the height of the heating season is far from uncommon. Such a nuisance happens not only in an apartment, but also in your own house.

All the batteries are hotter at the top, colder at the bottom. However, when the temperature difference is very large, this indicates a problem. After all, the radiator emits heat much less than planned.

The problems of the radiators themselves

Why is the radiator hot on top and cold on the bottom and how to fix it?

The bottom of the battery is clogged with dirt

At first in my apartment
... When they are warm, interview your neighbors.
When everything is in order with them, and with the heating wiring, as well as radiators, it means that it is in your device that matters.
Most often, the reason is that he was clogged with dirt.
- metal oxides (rust) and other suspensions, which, while settling, do not allow the coolant to pass through. Therefore, the top of the radiator is hot - the bottom is cold.
Try to warm up the battery in the problem area
... The water will boil there, set in motion and possibly the suspension will leave.

Note! Of course, the more efficient way to clean the battery is to remove it and rinse it out. However, you cannot do this work on your own, because you will have to disconnect the entire heating riser from the water. Housing office workers will refuse to do this in the winter cold. Therefore, the batteries should be flushed in advance, before the start of the heating season.

Air in heating devices

Batteries often do not heat well, because a plug of air was created in them. It is formed when the coolant is heated and the heating system abruptly fills it.

When the radiator is equipped with an exhaust valve, it is not difficult to deal with the problem with your own hands.

On modern types of batteries, this device is mounted at the top and functions autonomously, periodically bleeding off excess air.
Manual valves are also often used. They should be unscrewed and kept in this state until water begins to flow.
There are no taps on older models. But there is a stub.
Place a basin under the radiator to prevent water from spilling onto the floors. Unscrew the cap until you hear a hissing sound. Wait until all the air has come out and water begins to ooze. Then screw the plug back.

Incorrect installation of heating system elements

Now the following types of connection of heating pipes are common: diagonal analogue, bottom connection, side mounting.

The instruction considers the diagonal type of connection to be the most effective now.
The pairing is not correct when the supply line of the coolant is connected to the bottom of the batteries. Then hot water flows in the lower part of the heater and does not fully warm it up. Installation of an extension cord for water inflow can correct the situation.
Lateral connection is also ineffective. Then, in the radiators, only the initial sections warm up enough, at most 4/6. In this situation, qualified plumbers can help you.

Note! Cases are very common when radiators are hot on the last floors of apartment buildings, while below they are slightly warm. Here the problem is obvious - an illiterate design and installation of the heating system. Here you will not be able to do it yourself; the consultation of an independent heating engineer will be necessary.

It should be noted that the number of sections in any type of heating system should not exceed the regulatory limit.

When heating by gravity (gravity), the radiator should not have more than 12 sections.
In forced circulation systems, it is not worthwhile to make up heating devices, more than 24 sections. Otherwise, the last ones will not warm up anyway.

The heating battery in an apartment, private house does not warm up

Do you think that the heating battery does not heat well? There is only one reason: hot water does not flow into the radiator. There is no unambiguous algorithm for choosing subsequent decisions. Only a qualified specialist will be able to understand the current situation without bias and give his suggestions regarding your heating system. However, before the decision is made to call a plumber, there is much you can do yourself.

Maybe the neighbors are to blame?

It may sound trite, but first make sure that you have hot water at home, whether the tap is open for its flow, or the riser is blocked due to plumbing work in the basement. Do not be too lazy to run through the neighbors from the upper floors. In the case of unprofessional repairs, some of them will have a comfortable radiator temperature, but all residents will not receive heat from the bottom of the riser, they will be cold.

You have every right to go in a neighborly way with the question "do not heat the batteries: what to do", at the same time check the heating temperature with them. If a battery is found that is warmer than yours, then the problem that has arisen may be just the wrong installation of the valves at the neighbor. Your further actions taken will be according to the situation, perhaps the shut-off valves that have deprived other neighbors of comfort will be removed without a scandal. Or call your housing and communal services structure and, with the help of the administration, restore civil justice.

Briefly about the heat supply of an apartment building

If you have the courage to figure out on your own why the batteries do not heat well, it would be nice to get acquainted with the basic concepts associated with heating a residential apartment building.

Most high-rise buildings use a one-pipe system equipped with U-shaped risers. Let's show a conventional heat supply scheme for three floors.

Hot water (red in the diagram) rises through one riser and passes, for example, through the bedrooms, to the upper floor, where, in a loop, it goes down through other rooms (blue). This scheme has been designed since Soviet times for the use of cast iron radiators. Hot water enters the lower collector of the radiator and, having passed through all the sections, leaves the battery through the upper collector.

A special role was assigned to jumpers (bypasses). They kept the general forced circulation throughout the pipeline of the U-shaped riser (in the diagram - for the six radiators shown), being a safety net in cases of clogging of the radiators with liquid technical mud that accumulates during many years of operation. When the riser passed, some part of the total displacement of the hot water supplied from below turned to the radiator on one floor, and the rest passed unhindered, delivering heat to the apartments adjacent to the riser.

The emerging aluminum heating radiators are designed for two-pipe systems with hot water supply through the upper collector and its outlet from the lower collector. They have a completely different design of the internal cavity, respectively, different hydraulics. When they began to indiscriminately change outdated cast-iron radiators for modern aluminum ones, but retaining the one-pipe scheme, the heat flow from hot water inside the batteries began to weaken due to the diverging directions of convection heat flows from cooling water and hot water pumped by an external pump.

Concerned about the fact that the heating battery does not heat up, the residents began to go to various technical tricks, not at all caring about the freezing law-abiding neighbors. Such a mismatch in the types of structures and a decrease in the rate of passage of water through the radiator led to deposits of dirt in the sections. Every year more and more sludge is deposited, and now the last battery, completely clogged with sludge, does not heat up. Then this epidemic covers the entire radiator.

The main reasons for cooling radiators

So, everything is fine with the neighbors, the riser in the apartment is hotter than a cooled battery. This means that the problem is local, it's all about the radiator. An excursion into the basics of heat supply convincingly showed that the main reasons why the last battery does not heat up and makes such a longing for the freezing owner are likely to be:

Illiterate arrangement of an autonomous heating system

When arranging heating in your home, the question often arises why the last radiators in a two-pipe system are cold.

Why are batteries in a private house poorly heated?

Batteries in this case may be cold from below, when the "return" and "supply" were confused, or the circulation rate of the coolant inside the devices is not high enough.

In the first case, everything is simple. The battery was incorrectly connected to the supply and return pipes of the heating system. Here it is enough to disconnect the radiator and connect it correctly, according to the heating scheme.
When the radiator is hot from above, cold from below in the second case, this is explained as follows. When the coolant flows through the system at high speed, its elements will be hot everywhere. When the speed is low, the water gradually cools and the bottom of the radiators becomes colder.

Output

Inefficient operation of a heating radiator can be caused by completely different factors. First of all, you should understand what is the cause of the problems and only then try to eliminate them. The video in this article is also devoted to this topic.

Very often on thematic forums, the question of why the last battery is cold is discussed. This applies to both the heating circuit of a private house and the distribution of centralized heat supply in multi-apartment buildings. Also, a situation may arise when the heating element does not heat, being in the middle of the wiring. It is impossible to answer unequivocally to such questions. After all, there can be many reasons for such a situation. Also read: "Why is half of the radiator cold?"

Global heating circuit problems

Kote doesn't like cold batteries.

The reasons why one battery is hot and another is cold can be global:

the bypass is incorrectly installed;
there is no balancing;
insufficient pressure.

Bypass wired incorrectly. The bypass is a tube in front of the radiator. It connects the supply of the heated coolant and the return flow. The last battery does not heat well if the bypass is installed too far from it. Indeed, according to the laws of physics, it will be easier for the coolant to pass through the bypass than through the entire heating element.

The bypass cuts directly into the wiring and not through the two- or three-way valve. The coolant enters the radiator through taps. As a result, the cross-section of the supply pipes decreases. There is not enough pressure in the system to push hot water through the circuit. As a result, the last heating radiator does not heat.

Often, when the heating circuit is first started up, the last battery in the house does not heat. What to do? Experts recommend not taking radical action and letting the system align. The air that is in the water must come out naturally. After a while, the heating wiring will function normally.

Bypass dimatr error.

Incorrect installation of the radiator. Why doesn't the last battery warm up? The last radiator in the heating circuit may be too large. It contains more than 12 sections. In this case, the pressure in the system is not enough to drive the coolant through the entire volume of the heating element. The situation is aggravated by lateral connection. Hot water must not reach the outermost sections. As a result, the last heating radiator does not heat well.

Incorrect balancing. Balancing the system means even distribution of the coolant throughout the entire heating circuit.It is performed using shut-off valves and thermostats. If the last battery in the heating system is cold, then perhaps the problem lies in the uneven distribution of hot water along the wiring.

Everything about plastic pipes for heating: characteristics, dimensions, installation.

How thick should the steel pipes be for heating? The answer is here.

Why is the battery cold from the bottom

If the heater is partially heated, this may be caused by an incorrect connection, which leads to an incorrect distribution of hot water. If such a situation takes place, then the best option to fix the problem would be a diagonal connection diagram.

If the connection of the heating device is lateral, the heat supply does not pass through the entire device, but chooses a shorter path, only in this case only the upper part of the radiator is heated.

This situation can be corrected by simulating the diagonal circuit using an injection tube. It increases the flow rate and the heater heats up evenly. But you should not do this yourself, so it is better to entrust this to a plumber from the management company.

Another reason for the uneven distribution of hot water over the radiator can be its contamination (rust, scale), which narrows the passages for heating. In this case, hot water cannot circulate in full, so the battery does not fully warm up.

To clean the radiator, it must be rinsed several times under high pressure water. Regardless of the reason for the inconsistency in the thermal regime in a residential building, you should immediately contact the management company, then the housing inspection and Rospotrebnadzor.

According to the law, utilities are obliged to correct the problem within 24 hours in the heating system, if the cause is not complicated. If the situation is much more complicated, then the problems must be corrected within a week.

Watch the video. Cold batteries - possible reasons why the heating radiator does not heat up:

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Local causes of inoperability of the heating system

The last battery is too long.

Why is one battery hot and the other cold. Experts name the following reasons for this situation:

airing the system;
low quality of the coolant;
poor quality of the heating element.

In most cases, the above problems are solved independently by the homeowners. However, the help of a specialist is never superfluous.

Today, XLPE pipes are most often used for heating.

About whether it is possible to paint heating pipes made of plastic here.

Airing the system. Air can accumulate in individual elements of the heating system. This phenomenon is called contour airing.

Air can enter the wiring:

from an open expansion tank;
if ordinary tap water was used as a heat carrier. It contains a certain percentage of dissolved air;
the aggressive medium of the coolant oxidizes the walls of aluminum radiators. As a result, oxygen is released.It accumulates inside, forming a plug.

It is easy to determine if there is an air lock inside the heating equipment. To do this, turn off the taps on the supply pipe and return at the same time, and then open them in complete silence. If at the moment of opening the tap there are extraneous noises and gurgling inside the device, there is an air lock. It is she who is the main reason why one battery is cold, the rest are hot.

How to remove air jams, the video will help:

Debris and rust in the heating circuit can also explain why the last radiator is cold. Foreign objects block the flow of hot water, thereby reducing the heating efficiency of the house.

Why don't the batteries heat up?

You have noticed that the last battery in the heating circuit of the house is cold. What to do? Experts advise to first determine the nature of the breakdown. It can be both global and local. In the first case, you need to pay attention to the correct installation of the bypass and the heating element itself. The breakdown can be eliminated only by redoing the heating wiring in the house.

Local breakdowns include air locks and impurities inside the heating element. They are the main reason why the middle or last battery in the heating system is cold. These problems can be eliminated by a person without professional skills. But the help of specialists will not hurt here.

We figure out why the batteries in the apartment are not heated

To describe possible malfunctions, you need to briefly talk about the heating device in multi-storey buildings. Heating systems in apartment buildings are of two types - one-pipe and two-pipe. When single pipe system hot water is supplied to the batteries of the first (or last) floor and moves along the riser to the last (first). As a result, the batteries, in which the coolant enters the last turn, may not heat up enough. Most apartment buildings have a one-pipe heating system.

Another feature of one-pipe systems is the so-called bypasses. They are necessary so that only a certain part of the water gets into one radiator, and the rest flows further into neighboring radiators. You can read more about what a bypass is and what it is for in the article.

Two-pipe heating systems differ from single-pipe ones in that each battery is independently connected to two risers. Hot coolant enters one of them, cooled water leaves in the other. Such a system is often found in private houses, as well as in some new buildings.

Now we will analyze the problems in the heating system of an apartment building, due to which the batteries do not heat.

Problem 1: aluminum radiators in a one-pipe heating system

Modern aluminum radiators require a two-pipe heating system. When replacing cast-iron batteries with modern aluminum ones without replacing the heating system, due to the mismatch of structures, the flow of hot water becomes weaker. Accordingly, the batteries do not heat very much. Reduced water flow also contributes to corrosion and blockages. The blockage is removed by supplying water under pressure or using a special chemical composition. However, over time, an aluminum radiator in a one-pipe heating system can become clogged again. The way out is to replace the radiator, for example, with a bimetallic one.

Problem 2: airlock

Another cause of malfunctions in the operation of the heating system can be an air lock. To fix this problem, you can use the Mayevsky crane. It is screwed in instead of the plug, then a screwdriver is inserted into the thread and very slowly turned counterclockwise. If the problem was an airlock, the characteristic sound of air bursting out will be heard. After that, you need to stop the rotation.

If radiators do not heat only in one room, the problem should be looked for in the riser that heats this room.