Part of the battery may remain cold.

In this case, the following situations are considered:

• incorrect connection of the radiator;
• insufficiently high coolant temperature;
• the presence of air pockets and contamination inside the heating element;
• the cross section of the supply pipe is narrowed.

How can this be explained? It is necessary to take into account the laws of physics and remember that hot water is much lighter than cold water, and therefore is located at the top of the heating device. Gradually giving up its thermal energy to the surrounding air, the coolant cools down. Its density, and hence its weight, increases. He goes down. That is why often half of the battery is cold and half is hot.

In any case, if the radiator is half cold, you need to seek help from a specialist, and not try to solve the problem yourself. This may result in equipment damage or injury.

Consequences of incorrect connection of the battery to the circuit.

Low coolant temperature. The installation of the heating device is done correctly, but still half of the battery is cold. What to do in this case? Very often, especially in frosty weather outside, the coolant enters the heating circuit at an insufficiently high temperature. Giving heat to the heating element, it cools down completely. That is why the effect of a cold radiator from below is created.

Dirt inside the heater. Debris, rust, as a result of corrosion of the inside of the heating circuit, can cause the batteries to be half cold. What to do in such a situation? Before the start of the heating season, especially if the thermal distribution was organized several decades ago, it is necessary to clean the radiators. To do this, a locksmith is called from the corresponding service and they perform all the work.

The situation is worse if the radiators do not heat up after the start of the heating season. In this case, the entire riser of an apartment building or the heating circuit of a private building is decommissioned. After all, it is possible to remove contaminants from the radiator only when there is no coolant in it.

To bleed air from the battery, open the Mayevsky tap and substitute some kind of vessel.

Air locks. They may be the reason why half of the battery is cold. It is easy to check their presence if the supply pipe and the return of the heating element are equipped with ball valves or thermostats. They are simply covered. Then the upper tap is opened, while the lower one remains closed for only 10-15 seconds. If extraneous sounds and gurgling are heard at the moment the coolant enters, there is air inside the heating element. It prevents the free circulation of hot water, therefore half of the battery does not heat up.

You can solve the problem by simply bleeding air. To do this, heaters are equipped with a Mayevsky crane or a conventional crane in its upper part. Beforehand, a container for collecting hot water is installed under the locking mechanism. The Mayevsky tap opens and stays in this position until all the air has escaped from the heating device. The process is accompanied by spraying hot water under pressure. That is why it is recommended to cover the tap with a cloth.

The cross section of the supply pipe is narrowed . The heating element is mounted correctly, it is new and there is no air inside, and the battery is half cold. Reason: a thermostat or a tap with a narrowed flow section is installed. What does it mean? Through a pipe with a narrowed cross section, half the coolant enters the radiator. As a result, the speed of movement of water in the radiator decreases, therefore, the temperature of its surface also decreases.

What needs to be done? Dismantle the taps in front of the heating element. Before choosing a new device, be sure to consult a specialist. He must calculate the required section of the valve, which will not affect the movement of the coolant in the circuit.

Complete space heating

The air temperature in the room will always be low if half of the radiator is cold, half is hot. The reason for this may be incorrect installation of the radiator, the presence of a tap with a narrowed cross section in front of it, pollution and air inside the heating element. Any problem can be fixed if you seek help from a specialist. It is not recommended to carry out repairs yourself, as this leads to equipment failure or injury.

The heating is turned on, but the batteries are cold: practical tips for restoring the heating system

The heating is turned on, but the batteries are cold: practical tips for restoring the heating system

With the onset of cold weather, heating devices should be turned on in each 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, 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 do not allow the batteries to become warm.

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

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Causes of cold radiators

If, with the onset of cold weather and the heating season, heating was given to your house, and the batteries do not work, then the problem may be a technical malfunction or the functioning of the entire supply system.

Especially if we are talking about a city apartment, where heat should be provided by the housing service or another authorized body that checks the readiness of the entire system for the heating season. Well, in the case of a private house, the solution of problems falls on your shoulders. If you wish, you can contact the Eurolux Group company, this company will do all the work quickly and not expensively.

And here it is important to understand the main causes and individual problems that will need to be eliminated in order for the batteries to give off the maximum amount of heat.

Advice: if you called a plumber to your house, check if only one battery is cold, or if a similar problem arose in the entire apartment, riser or porch. To do this, interview your neighbors so that it is easier for a specialist to determine the possible cause of problems and repair the system faster.

We can identify the main factors in which the batteries remain cold:

• the presence of air pockets in the heating system;
• technical blockage of a single battery;
• incorrect connection of each of the elements and the entire system as a whole.

These criteria can affect the operation of both a single battery and the overall system. Only after the elimination of these problems it will be possible to talk about the full functional operation of the heating system in each room.

Let's consider each reason separately.

Air locks

When examining functional features and troubleshooting cold radiators and batteries, it is important to take care not only of one of them, but also to check the condition of the entire system. Such solutions involve a check for performance, in the presence of air pockets in the system.

Plugs can occur due to the appearance of an excessive amount of air during the operation of radiators. At the same time, if we are talking about a city house, then, as a rule, the upper floors of high-rise buildings suffer.

But this problem can be easily fixed. To do this, in modern batteries, special valves are installed in the upper part, which allow you to remove the accumulated air, restoring the operation of the system.

It is important to know: all these procedures must be carried out without high pressure and hot water or reagent in the system, in order to avoid burns.

Clogged heating system

If the system has already been heated, and you still have cold batteries, there is a possibility of clogging of the existing system elements. This can be both the deposition of the corrosive properties of the metal, and the gradual accumulation of scale and a large amount of dirt on the walls of the radiators.

To carry out flushing efficiently and quickly, adhere to the following recommendations:

• move furniture, remove curtains, cover the floor with cellophane or cloth to avoid damage;
• shut off the coolant supply with a shut-off valve. If it is not installed, but remove the battery, unscrew it and pour the liquid into the basin;
• to clean the radiator, it must be transferred to the bath, on the bottom of which it is recommended to put a wooden flooring;
• using a wrench, unscrew the end fittings, let the dirty liquid flow out of the battery into the bath;
• under pressure, pour water from the hose into the battery;
• if a crystalline blockage has formed, then cleaning should be carried out using a special reagent. Through the use of a chemical formula and high-quality pressure in the system, it is possible to remove existing problem areas of scale and corrosion and get warm and fully functioning batteries again. You can also use a 70% solution of vinegar with water;
• pour the reagent or vinegar solution into the battery, close the vents and let it brew for 2 hours;
• rinse the battery inside and out under pressure, wipe the battery dry and install on the bracket.

Sometimes such actions do not help and you have to buy a new battery.

Connection errors

Also, a separate item may be such a reason as incorrect connection of each of the elements of the heating system. Sometimes the supply pipes with the coolant and the supplied liquid are fixed from below.

This prevents the battery from gaining maximum heat, and the upper areas may remain cold. In this case, it is necessary to reinstall the connection elements and let heat through the upper section of the supply pipes and connections.

So, if you find that the batteries in the apartment have become cold or not warm enough, we recommend that you do the following:

1. Determine the type of failure. If this is a separate battery, then it is necessary to block the flow of coolant into this element. This can be done by using a supply valve.
2. Wait until the liquid has cooled down and disconnect the damaged non-working battery.

Note: if the problem persists when installing a new element, then it is necessary to check the supply elements with a higher pressure in the system. Such work can only be performed in spring or autumn.

1. Clean the system or install a new battery.
2. Allow the coolant to enter and check the operation of the entire system.

Today, heat transfer and efficiency are important parameters when choosing radiators and radiators. Well-thought-out solutions, using the qualitative characteristics of the metal, make it possible to obtain not only durable, but also more practical elements for heating an apartment or a room.

That is why many seek to replace old cast iron batteries and install modern and more economical ones. In addition, not the last place is occupied by the aesthetic appearance of the batteries. Today it is possible to choose batteries that are ideal for the interior, creating comfort and coziness in the room.

In any case, when selecting and repairing a heating system, it is important to correctly identify the cause and eliminate it before the onset of cold weather. Thus, it is possible to avoid freezing of the entire system, the repair of which will cost much more than a single element.

What to do if the batteries in the apartment are cold, see the following video:

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Kote does not like cold batteries.

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

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

Bypass installed incorrectly . The bypass is a tube in front of the radiator. It connects the supply of heated coolant and the return. 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 distribution, not through a 2-way or 3-way valve. The coolant enters the radiator through the outlets. 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 up.

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

Error in bypass dimatra.

Incorrect radiator installation . Why is the last battery not heating up? Perhaps the last radiator in the heating circuit is 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 the lateral connection. Hot water does not reach the extreme sections. As a result, the last heating radiator does not heat well.

Wrong balance . Balancing the system means uniform distribution of the coolant throughout the entire heating circuit. It is carried out with the help of shut-off and control 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 through the wiring.

Local causes of inoperability of the heating system

The last battery is too long.

Why is one battery hot and the other cold. Experts call the following reasons for the occurrence of such a situation:

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

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

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

Air can get into the wiring:

• from ;
• if ordinary, tap water was used as a heat carrier. It contains a certain percentage of dissolved air;
• the aggressive environment of the coolant oxidizes the walls . As a result, oxygen is released. It accumulates inside, forming a cork.

It is easy to determine if there is an air lock inside the heating equipment. To do this, you need to turn off the taps on the supply pipe and the return pipe at the same time, and then open them in complete silence. If at the time of opening the tap inside the device there are extraneous noises and gurgling, 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 congestion, the video will help:

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

Why don't batteries heat up?

You have noticed that in the house heating circuit the last battery is cold. What to do? Experts advise first to 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 pockets and contamination 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 here will not hurt.

Ecology of consumption. Home: When looking for the cause of cold radiators, start by visiting your neighbors and ask them about the temperature of the radiators. If their batteries are cold - the problem is in the common house system, if they are hot - the reason must be sought in your apartment. Let's talk about this in more detail in our article.​​​​​​​

Start looking for the cause of cold radiators by visiting your neighbors and ask them about the temperature of the batteries. If their batteries are cold - the problem is in the common house system, if they are hot - the reason must be sought in your apartment. Let's talk about this in more detail in our article.

Low coolant temperature

The reason for cold batteries may be the interference of neighbors in the heating system of the house. The most common violation in this area is an increase in the number of batteries or its sections, a change in the diameter of the distributing pipelines, and new connection schemes. All this leads to hypothermia of the water at the outlet of the apartment and unbalance of the heating system. The coolant can no longer heat the next apartment to the desired temperature.

If the battery temperature is 30–40 degrees and water movement is heard in the radiator, then the boiler room may not be able to cope with the load. It is necessary to call the heat generating company and clarify the situation.

Air locks

Air locks often form in the system at the beginning of the heating season after the pipes are quickly filled with water. On modern batteries (or on risers), special valves are installed that react to the air in the system and release it outside automatically. Often taps for bleeding air are located in apartments on the upper floors. If the devices are not automatic, contact the neighbors on the top floor and ask them to remove the airlock.

It is very simple to bleed air manually - just unscrew the valve and wait until water flows. Often an air lock can form in your battery. In this case, it is necessary to bleed air from it.

To bleed air using the Mayevsky tap, turn the valve shut-off screw, and when water flows, screw the screw back.

It is more difficult to restore the operability of the system if there are no air release valves. In this case, unscrew the plug on the radiator until air hiss appears. The plug is wrapped when water flows from the gap.

Flushing the heating system

Processes constantly occur in pipelines and radiators that worsen the operation of equipment: the formation of scale and sludge, metal corrosion. As a result, scale and rust build up on the inner walls, and dirt appears in the pipes. A layer of scale of 1 mm absorbs an amount of heat comparable to the thermal insulation of pipelines with mineral wool.

Deposits reduce the capacity of the pipes, reducing the supply of hot water to the heat exchangers, lead to the appearance of fistulas on the pipes and reduce the life of the heating system as a whole.

Regular flushing of pipes and batteries ensures the normal operation of the heating system. Washing is done if the scale thickness is more than 0.5 mm. Work is recommended to be carried out before the start of the heating season.

Battery flushing

The need to clean the radiator appears if the top of the battery is warm and the bottom is cold.

The battery is removed, disassembled into sections and washed off the dirt. Scale is removed chemically. After drying, the radiator is assembled, the joints are sealed.

Heavy batteries can be washed on site. To do this, you need a scale solvent, for example, calcined salt. The cap is removed from the battery, the lower inlet is muffled. Hot water with a solvent is poured inside. After 2 hours, the solution is drained, clean water is poured inside under pressure.

In emergency cases, flushing the batteries in the apartment can be done as follows:

1. Shut off the coolant supply to the battery.
2. Drain the water from the battery.
3. Remove the radiator.
4. Take the battery to the bathroom.
5. Remove the side covers.
6. Use a hose to flush the inside of the battery.

In the presence of crystalline formations, prepare a concentrated acetic solution (70%). Install the bottom plugs on the radiator and pour the solution inside. After 2 hours, flush the battery with pressurized water. After washing, put the plugs using tow.

If the scale cannot be cleared, the battery is replaced.

Important! The cleaning method also depends on the material of the battery. For example, aluminum radiators cannot be washed with alkaline and acidic solutions.

Flushing risers

Flushing one radiator will do little good, after a short period of time the dirt will again enter the battery. It is necessary to clean the entire system of the house or entrance. To flush pipes, you will need professional equipment that allows you to clean the system with water hammer, compressed air, and a shock wave even during the heating season.

Cleaning the system from debris

In the heating system, deposits, along with corrosion products, enter the lower part of the wiring and clog it, reducing the flow of water to the heat exchangers. Garbage accumulates at tees, spurs, bends. To remove debris, it is necessary to dismantle these elements, remove dirt. The elevator nozzle may also become clogged if the heating system is centralized.

Causes of low water pressure at the battery inlet

The main reasons for the low pressure of the coolant:

1. Incorrectly soldered polypropylene pipes.
2. Use of taps with narrowed flow section.
3. Use of pipes with a small diameter.

In these cases, the coolant pressure is not enough to warm up the entire battery. System elements must be replaced.

In this case, it is necessary to restore the heating system to design parameters.

In some cases, it is impossible to fix the problem without redoing the entire heating system. For example, if the batteries on the upper floors are hot, but the lower ones are not.

Battery mounting

After repair or installation work, the batteries may heat up partially, for example, only the upper part or the first 2-3 sections. The reason is the incorrect connection of the radiator.

In most cases, the connection of batteries to the network is diagonal - water enters the radiator from above and exits from below. The normal state of the device is when the temperature of the upper and lower parts differs little. A large difference in heating between the top and bottom may indicate that the hot water pipe is not properly connected. If water is supplied from below and exits through the upper pipe, only the first couple of sections or only its upper part will be heated on the battery.

The lack of hot water in the heat exchanger may be due to the installation by neighbors of batteries with built-in thermostats that are able to shut off hot water. The operation of such batteries requires the presence of a bypass pipe (bypass) in the system through which water flows when the thermostat on the radiator is triggered. In the absence of a jumper, the coolant will not flow beyond the radiator.

The heating system is not balanced

With a small amount of water in the system, not all radiators warm up equally. The problem is solved by hydraulic balancing, which will ensure the passage of a different amount of liquid through each device. The adjustment can be performed if the system has bypass and balancing valves, as well as pressure flow regulators.

If the top of the radiator is hot and the bottom is cold, apply modular balancing. To do this, the network is divided into separate elements (one battery, a group of batteries, a riser, etc.) and equipped with a balancing valve. This device allows you to individually configure each module.

When carrying out repairs, remember that the water in the system is hot and under high pressure. If there is no self-confidence, call a locksmith from a service organization.published

• violation of the technology of filling the system with water after the summer period;
• non-compliance with the mode of deaeration of water;
• repair with disassembly of pipelines;
• non-observance of slopes during the installation of the heating system;
• air leaks through leaky joints.

To remove air from the system, a Mayevsky crane is used, mounted on a radiator. You should open it, wait until the air comes out, the hissing stops, the water begins to pour out calmly without bubbles. After that, the valve is closed. Do not forget to substitute a container for draining water or a towel.

There are no Mayevsky cranes in old cast-iron batteries. The air is released without completely unscrewing the plugs at the ends of the radiators. It is better to entrust this operation to plumbers - if you unscrew the plug completely, you can flood the apartment.

Valve failures

The valves may be in the closed position, the control devices may be incorrectly adjusted. Faulty shut-off valves are not ruled out. If the riser is hot and the batteries are cold, the position of the valves should be checked - they should be open at the inlets to the radiators, and closed at the jumper between the supply and drain.

Over time, valve parts become covered with scale and dirt. There are leaks or the valve does not turn at all. The audit of the crane with the cleaning of parts from deposits will help. The cardinal solution to the problem is the complete replacement of the entire device or valve head.

blockage

When the system is clogged, pipes and radiators are completely or partially clogged with various deposits. A sign of clogging is dirty water from the Mayevsky tap. Scale on the internal surfaces of radiators has heat-insulating properties and reduces the heat transfer of heating devices. To clean their batteries:

• remove;
• dismantled into sections;
• placed in a bath on a soft bed;
• washed with a stream of water under pressure;
• fill with a solution of vinegar or soda ash;
• perform a re-wash;
• collect and install.

Special equipment is required to clean contaminated pipes. This work should be entrusted to specialists.

Insufficient pressure in the system and low coolant temperature

When the risers are slightly warm, the coolant is at a low temperature or is supplied under insufficient pressure. The reasons may be:

• actions of neighbors to "improve" the heating system (exceeding the calculated diameter of pipes, the number of radiator sections, changing the connection scheme, installing water-heated floors);
• incorrect position of valves in heat supply networks;
• poor performance of the boiler.

In any of the cases described, it is impossible to cope with the problem on your own - you should contact the management company.

Incorrect setting of the heating system

A sign of an incorrect setting of the heating system is the different temperature of the batteries connected to the same riser. Most of the coolant enters one radiator, the other remains cold. To eliminate the malfunction, open the valve more on a cold battery and close it a little on a hot one. If there is no change, the cold radiator is probably clogged.

Malfunctions of heating in private houses

Autonomous heating systems of private houses have their own characteristics and specific faults are inherent in them.

Boiler malfunctions

Most often, there are problems associated with the incorrect operation of the built-in automation system. If it is not possible to adjust the automation on your own, contact a company that provides service for boilers of this type.

The automation system will not allow the boiler to turn on if there is insufficient draft (the chimney is clogged with soot), low pressure in the system. To eliminate the causes, clean the chimney, check the water level in the expansion tank and the operation of the circulation pumps.

Another cause of problems is insufficient boiler power. Sign - automation does not turn off the boiler, it works constantly. The remedy is to replace the boiler with a more powerful one.

Wrong choice of heating system

Single-pipe heating systems are cheaper than two-pipe ones, but are only suitable for heating small houses. The last battery from the boiler will be colder than the previous ones. This problem can be eliminated only by replacing the system with a two-pipe one.

The rest of the problems are similar to the malfunctions of the heating systems of apartment buildings and are discussed above.

Prevention of heating problems

Preventive work should be carried out in the summer. It is better to combine them with major or current repairs. For the heating system to work properly, you need:

• analyze the work of heating in the previous winter, find weaknesses;
• check the operation of shut-off valves, repair or replace the faulty one;
• if there are no Mayevsky taps, valves for supplying coolant to heating devices, they should be installed;
• check the slopes of the supply pipes, eliminate violations, if this is not possible, install Mayevsky cranes in problem areas;
• flush or replace radiators that did not heat up enough during the previous heating period.

Prepare the heating system for operation in the summer and the probability of failures will decrease many times over.