The heated towel rail does not heat: all the causes and solutions to the problem

Some problems with the heated towel rail

Consider the options in which this household device fails and ceases to function qualitatively:

• lack of a hot water supply system;
• after repair work, the device became clogged with dust and dirt;
• the formation of air congestion;
• outdated pipes;
• incorrect connection;
• water does not circulate in the system;
• seal wear.

In any of the above options, the heated towel rail does not heat, since, for example, in the first case, if a dead-end system is installed, which implies a high-quality supply of hot water when the tap is opened, then it is better to install an electrical appliance.

To clear blockages proceed as follows:

• close the inlet and outlet valves of the device and remove it;
• install plugs;
• using a brush or soft wire, remove dirt and blockages from the device and pipes;
• if salt has formed on the walls of the device, then tap on it and remove plaque;
• using a hose, first rinse the supply pipe, the return section and the device itself;
• for this, you can use hydrochloric acid, which is filled with the device set with the drives up. After some time, the solution is drained and the unit is washed. The acid will help soften hard salt deposits;
• if this option does not help, then replace the device.

If the heated towel rail in the bathroom does not heat, one of the reasons may be the formation of an air lock. To correct the problem, bleed the air. There are models with a built-in automatic or manual faucet, and if the device does not have such equipment, then during installation it becomes necessary to install a Mayevsky valve, through which air is released. After this operation, the appliance starts to heat up as the water circulates normally.

If the pipeline is outdated, then it can be clogged, and this causes reduced pressure, which prevents plumbing fixtures from functioning properly.In order to clean, close the tap, and put a plug on the hot water valve. After it is twisted, the tap is opened, and dirty water and sludge come out through the drain. But if this did not happen, then the supply lines of the heated towel rail are contaminated. All horizontal sections are cleaned using a brush or metal wire. After this operation, install the device in place, open the valve, close the plug, and open the valve on the circulation line.

If the heated towel rail does not heat, there is no water circulation, then they turn to the appropriate services for help, which troubleshoot.

If the plumbing fixture is with a rotary system, then the gasket may wear out, which is replaced with a new one using fluoroplastic elements. Such a device cannot be overloaded and therefore additional hooks are installed.

Experts recommend choosing a device without a rotary system for an apartment, and during installation they install a bypass, then during the repair you will not have to turn off the central riser.

Filters are installed at the inlet, which extend the life of the plumbing fixture.

The heated towel rail is an indispensable and convenient device for the bathroom. Therefore, there should be no problems during its operation. But if the ladder does not heat the heated towel rail, then you can troubleshoot on your own. But if there is no experience in this matter, then specialists are called.

Causes of breakdowns and troubleshooting methods for electric heated towel rails

Electric heated towel rails (often called design radiators) have a sufficient margin of safety, but, like any other technique, they can fail due to resource depletion, internal defects, overheating or power surges in the network.

Depending on the design, two types of electric design radiators are distinguished - solid-filled and liquid. Heat transfer in the former is provided by graphite and other compounds, while the latter function by heating specially prepared water, antifreeze or a mixture of mineral oils. In solid-filled design radiators, both a traditional spiral or tubular electric heater, and a heating film or cable can be used. Liquid "towels" are built using traditional "dry" or conventional heating elements.

The device and wiring diagram of the electric heated towel rail

In order to find the cause of the breakdown of the electric heated towel rail, you will need a multimeter, a set of screwdrivers and an adjustable wrench. The search begins with checking the integrity of the electrical circuit, gradually moving towards the power elements:

• check the presence of mains voltage in the outlet;
• "Ring" the power cord with a multimeter - its resistance should not exceed 1-2 ohms;
• when the substation is connected to the network, the voltage at the terminals of its heater is measured. If the multimeter shows the presence of 220 V, then this is an indirect evidence of the failure of the heating element;
• in the absence of supply voltage at the heater terminals, the serviceability of the contact group or the thermostat relay is checked - the cause of the malfunction can be both burning of the contacts and poor electrical connection;
• if not a mechanical, but an electronic thermostat is used to control the temperature of the heated towel rail, then it is more difficult to find the reason for the lack of voltage on the heating element. First of all, you should check the output relay or power semiconductors - powerful transistors, thyristors or triacs of the output stage. If they are in good condition, other components of the circuit are subjected to verification. If you have no experience in repairing electronic devices, then it is better to entrust this work to a specialist.

All you need to diagnose and repair an electric heated towel rail is a multimeter, an adjustable wrench and a set of screwdrivers

Replacing the heating element in a heated towel rail is easy. If the type of device is unknown, then before disassembling it, turn the coil over so that the working fluid does not leak out. Then, with an adjustable wrench, unscrew the nut on its flange, dismantle and replace the heater. Don't forget to check, whether there is any current leakage on the design radiator case. To do this, one multimeter probe is connected to the metal surface of the heated towel rail, and the other is touched in turn with the leads of the heating element - the device must show infinitely high resistance.

Burnout of the heating element is the main cause of breakdown of electric heated towel rails.

Before assembling the heater, replenish the level of the working fluid (if there were leaks or part of the oil leaked out during operation), leaving room for thermal expansion. After that, the integrity of the sealing gaskets is checked and, if necessary, replaced with new ones. Next, with a force sufficient to ensure tightness, tighten the flange nut and check the performance of the heater in various modes.

5 reasons why dryers get cold

Towel dryers do not heat the bathroom for the following reasons:

1. Turn off the hot water supply. The next time you turn it on, an air lock may have formed.
2. The water pressure in the hot water riser has increased, and in the heated towel rail it has decreased. In this position, there is no liquid circulation in the dryer itself, since water cannot escape from it.
3. Installing a heater in the bathroom, with your own hands, without knowledge of the basics of heat engineering and hydraulics.
4. The heated towel rail does not heat up when it is inserted into the hot water supply pipe with a dead-end DHW circuit. This often happens when the owner himself tries to connect the dryer, not knowing the hot water supply scheme.
5. Electric dehumidifiers do not heat when there is no power supply.

How to eliminate emergencies prompt and help experts.

The main difficulty of the drying device

This problem can often be faced by residents of high-rise buildings when a centralized heating system is turned on in the autumn. At this time (when the pipes are filled with water), air may appear in the pipes. Similar plugs in most cases appear in the final parts of the heating system, which is considered to be a heated towel rail.

As soon as there is air in the pipes, the high quality circulation of hot water is broken, so the dryer stops heating.

A long ordinary towel dryer can significantly affect your habits and good quality airing of the bath, because a lot of moisture even in seven days can appear on the wall decoration of the room.

If you are going to install the device drying towel or already installed, you must be aware of all its methods and possible problems of their solution.

What to do

In the case of an electric heated towel rail, check the connection to the outlet, if this does not help, use a tee and connect the device to another outlet.

With a water heated towel rail, there may be the following problems:

1. The faucet on the riser is closed. Opening the faucet will solve the problem.
2. There is no return line on the riser, or it is located before the heated towel rail. The problem can only be solved by connecting an electrical appliance.
3. The device is mounted on the pipe of the heating system. The heated towel rail will only become hot when the heating is turned on.

Please note: the problems listed above and ways to solve them apply only to new heated towel rails that have not yet been used.

Typical schemes for switching on heated towel rails

In the houses of the old housing stock, a section of the riser, curved in the form of the letter "C" or "M", was used to heat the bathrooms and bathrooms. The simplicity of such a PS, however, has a number of advantages. Being connected in series to the DHW circuit, the device ensures a constant temperature, excludes interference in the operation of the system by other residents and practically does not affect the hydraulic resistance of the line.

A heated towel rail in the form of a riser section, although it has an unsightly appearance, is at the same time the most unpretentious heating device.

With the advent of more aesthetic stainless steel heated towel rails, it became necessary to replace old appliances with the least interference with the operation of the heating system. An ideal situation can be considered when the inner diameter of the riser is equal to the cross section of the contour of the new substation.Of course, if the heating device is cut in using couplings and drives of the appropriate diameter.

A complete replacement of the simplest heated towel rail with a modern stainless steel device is possible only if fittings with a full flow area are used - there can be no question of any installation of ball valves

If taps and fittings are used to connect the heated towel rail, or if the new heater consists of pipes of a smaller diameter than the riser, then a bypass must be used. Being, in fact, a workaround for the coolant, this simplest device makes it possible:

• maintain circulation of the coolant through the riser even if the substation is connected by pipes of the minimum diameter;
• regulate the temperature of the substation or carry out its dismantling without affecting the general house heating system or hot water supply (installation of shut-off valves or a thermostatic device is required);

• passing through itself the main flow of the coolant, the bypass ensures the constancy of the coolant temperature for all apartments in the house.

  Depending on the wiring diagram, a straight (1), tapered (2) and offset (3) bypass is used

Over time, developers abandoned the installation of the simplest substations, leaving the tenants the right to choose and install a heating device. To do this, they began to draw conclusions under the heated towel rail on the riser, while at the same time providing a normal flow of coolant through a direct or offset bypass. I must say that there is absolutely no reason to worry about the performance of such schemes - water is guaranteed to circulate through the heater thanks to the principle of "gravity pump".It is based on the fact that the cooling coolant goes down and is replaced by masses of hotter water coming from above.

The thermogram of a heated towel rail operating on natural circulation indicates the high thermal efficiency of the "gravity pump"

For the same reason, the installation of a substation is considered the most effective, in which the coolant is supplied to the upper part of the heating device and taken from below. This condition can be ensured both with lateral and diagonal connections.

The opinion that the latter method has an advantage in terms of flow rate and thermal efficiency is greatly exaggerated. However, one of the best schemes is considered to be the one in which the coolant is supplied to the near upper corner, and the return line is connected to the remote lower one.

A lateral straight or diagonal connection will not cause any surprises if the connection is made taking into account the necessary slopes

In this case, the operability of the PS does not depend on the speed and direction of the coolant supply, and the risk of airing the device tends to zero. The only condition is that in this case, slopes of at least 3 mm per 1 linear meter must be observed. m highway.

With a lateral connection, it does not matter at all whether the PS is between the supply and return points or protrudes beyond them. The only thing to consider is a significant increase in the risk of airing the device if its upper part is above the branch along which the heated towel rail is connected to the riser

Mounting a heated towel rail above the tie-in point into the main increases the risk of air locks - in this case, you will need to install an air vent (Maevsky tap)

The lower connection of the heating device is considered less efficient and may cause its unstable operation.

The operation of heated towel rails with a bottom connection is very dependent on the pressure and direction of the coolant supply, therefore several connection schemes are used - with a direct, offset or narrowed bypass

This type of installation is recommended only for at top feed, as well as in systems with forced circulation of the coolant.

How to understand if the device can be repaired

What to do, if not working towel warmer in the bathroom? Having determined the source of the problem, you will need to repair the device as soon as possible. But doing it yourself is recommended only in those situations where you have the appropriate knowledge and skills.

And if there are none, then you will need to urgently contact a specialist who will restore the device to working capacity again, eliminating the malfunction.

In other cases, the consequences can be more than dire. Breakthroughs are possible, due to which your apartment will be filled with hot water, as well as water will drip from the ceiling downstairs neighbors.

If the heated towel rail connected to electricity does not work

Electric heaters are considered quite reliable, but they can also fail.

• Burnt out heating element.
• Thermostat malfunction.
• Wiring problems.
• blockage.

Clear blockage

Blockages appear only in combined devices - they work on hot water and electricity. To check if there is a plug inside, turn on the device and after a few minutes check its temperature next to the heating element and in another section of the coil.If the heater is warm and the rest of the pipe is cold, there may be scale in it. Remove the equipment so that the liquid does not leak out and clean with a plumbing cable.

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Instagram @lis_nadya_lis

Check the electrics

If the heater remains cold, the problem lies in the electrical part. You can search for a malfunction in the following way:

• Examine the outlet. If there is no visual damage, check it with an indicator screwdriver. Replace socket if necessary.
• Some devices have a thermostat. Spin it. A weak click indicates serviceability.
• Set the multimeter to fix the DC resistance level and check the resistance of the heater and wires. The indicators of the first should be less than 1 ohm, the second should approach infinity. If other numbers are displayed, the wiring is changed.

Diagnosis of heating elements with a multimeter:

• Disassemble the heating element and carefully disconnect the wires connecting it to the electrical system. The user manual will help you with this.
• Set the measurement scale to Ω and enter the maximum value.
• Ring separately all the wires and the heating element itself.
• If the indicator tends to zero, there is a short circuit in the system.

Replace hardware

Replacing the heater is easy. You will need a screwdriver and wrenches. Dry heating element is unscrewed and a new one is installed. If it comes into contact with the liquid coolant, the coil is unscrewed, the liquid is poured into a suitable container, the heater is changed and the coolant is poured back.

In the article, we told why the heated towel rail in the bathroom does not heat up, and what to do in each of the cases.To repair the equipment connected to the DHW, work in the sequence that we have described.

Features of the repair work

Why is the heated towel rail in the bathroom not working? Having decided to fix the breakdown yourself, you will need to prepare the necessary tools and start repairing the device, the progress of which will depend on the type of breakdown.

1. Clogged electric towel warmer. If there is no circulation in the heated towel rail, in such a situation it will be necessary to produce a cold heated towel rail in the bathroom. It is disconnected from the electrical network, and then removed from the wall. Then it is necessary to unscrew the valve and thoroughly clean the device using a metal wire, with further cleaning of the pipe area at the beginning. At the end of this procedure, you can install the heated towel rail in its original position to check its performance. If everything is fine, then you can use the device to its full extent and enjoy the optimal temperature in the bathroom.
2. Clogged water pipes. If the heated towel rail is cold, although there is hot water, in this case it will also be necessary to remove the device and drain the remaining water from it. And then you should do the cleaning, as we have already discussed above in the text.
3. The appearance of an air pocket. In such a situation, it will be necessary to release air from the device using the Mayevsky crane. For these purposes, it is necessary to find the same crane by partially dismantling the structure. To do this, take a screwdriver and slightly unscrew the bolt so that the air begins to escape. After this process is completed, water will begin to flow from the tap, which will indicate that the air lock has been successfully eliminated.At the final stage, you only need to return all the structural elements to their original places and check it for operability.

What to do if the heated towel rail in the bathroom does not work?

Did you make repairs in the bathroom and installed a new heated towel rail, after some time it stopped heating? Or have you been using the dryer for a long time and all of a sudden it stopped heating up? In order to quickly solve the problem and prevent the appearance of an unpleasant smell of dampness and the development of fungus, you should find out the cause.

It is worth recalling that domestic hot water systems can be of two types:

• dead ends.
• stationary.

The disadvantage of the former is that hot water is supplied to the consumer directly from the network. Moreover, as soon as the tap is turned off, the water in the pipes begins to cool. To get hot water, you have to drain the cooled water from the riser. DHW circulation systems are free from this disadvantage because hot water flows through the supply riser, flowing out through the return (circulation) one. This eliminates the problem of cooling and stagnation of the liquid.

That is why the installation of heated towel rails is carried out on the return riser. If the house does not have a centralized hot water supply system, you can install drying in the heating system according to a similar principle.

Reasons why the heated towel rail does not heat up:

• there is no hot water in the system. If we are talking about dead-end systems, in which hot water is supplied only when the tap is open, it is best to use electric drying options;
• the formation of congestion and blockages.If the heated towel rail has been installed for a long time and for some reason has not been heating recently, most likely it should be cleaned. To do this, turn off the tap and remove the equipment. It is advisable to put plugs on the pipes. Then, using a soft wire with a ruff, go through the pipes. You can remove salt deposits from the walls of the device with small taps. At the final stage, the dryer should be thoroughly rinsed under the pressure of water. You can also rinse the sanitary ware with a solution of hydrochloric acid. To do this, put the land upside down and fill it with a solution. After a while, drain the solution and flush the equipment. Hydrochloric acid softens hard deposits. If cleaning did not help, one thing remains - replacement;
• installation errors. If the installation of the equipment was recent, but the device does not work, the reason may be that the heated towel rail is far from the riser in the bathroom. As a result, there is too much resistance inside the device, and hot water simply cannot get there.
• old pipes. The pipeline in the DHW system becomes clogged over time. This can cause insufficient pressure, and hence the unsatisfactory operation of plumbing fixtures. To clean the pipes, close the tap and put a plug on the DHW line drain. Screw on the plug and open the valve on the circulation line. Sludge and water should go through the bleeder. If hot water does not flow through the drain, this indicates a clogged supply or the heated towel rail itself. As a rule, it is difficult to clean the vertical part of the supply lines. The horizontal section is cleaned in the manner described above (using a metal rod and a ruff).After the inlets have been cleaned and you have made sure that the dryer is not clogged, install the equipment in place, open the valve on the hot water pipe, close the plug on the drain and open the valve on the circulation line;
• airlock. The heated towel rail may not heat up if an air lock has formed in the system. You can bleed air with the Mayevsky crane. There are models with an automatic or manual air bleed option. After the air is removed from the system, the water will begin to circulate freely and the equipment will quickly reach the desired temperature;
• There is no hot water circulation in the DHW system. You can solve this problem by contacting the appropriate authority.
• the device installed in the heating system does not work. In such a situation, the heated towel rail does not heat most of the year until the onset of the heating season - what to do? This problem can be solved by transferring the device to the DHW system or replacing it with an electric dryer.

Troubleshooting depending on the type of heated towel rail

In an electric heated towel rail, you need to check the serviceability of the power line

If an electric heated towel rail suddenly cools down, you should draw up a plan of action, prepare tools and start repairing.

For work you will need:

• wrench;
• multimeter;
• pliers;
• screwdriver;
• FUM tape;
• filler.

Further sequence of actions:

1. Check the condition of the power line. Measure the voltage at the outlet, the readings of the power cord, the performance of the thermostat relay.
2. If there is an electronic control unit, examine it in the workshop or using a special computer program.
3. Strip the contacts, connect the line, turn on the device. If he did not start to warm up, the reason must be sought in him.
4. Loosen the wall fasteners, unscrew the side nuts, and then remove the heater by turning it over so that the coolant does not flow out of it.
5. Replace the element, make sure that there is no current leakage to the housing, top up the working fluid if necessary.
6. Check the performance of the assembled structure.
7. Put the device in place, tighten all fasteners tightly.

The repaired device should warm up in accordance with the indicators set out in the instructions for use.

In a water structure, it is often enough to bleed air

It is necessary to prepare such devices:

• wrench;
• plumbing pliers;
• new gaskets;
• container for collecting water;
• cable with a brush;
• FUM tape;
• floor cloths.

Within your bathroom, you can do the following:

• Check hot water supply. To do this, you need to get into the basement and look at the position of the valve on the riser. Sometimes, in order to save money, people with a small income arbitrarily fasten the heating.
• Bleed the air. This is done using a Mayevsky crane or by loosening the union nut. If this does not help, you need to ask the neighbors from above to do this, in whose apartment the line is looped.

An example of a request to turn off the riser

If you cannot fix the problem on your own, you need to act officially. You should write an application to the management company to turn off the riser for repair work. The best solution is to pressurize the circuit with special equipment.This procedure allows you to get rid of blockages and deposits in the pipes, as it is carried out by flushing them with chemicals under pressure. Since this is not always possible, it is often necessary work with your hands.

The options are:

1. Disassemble the structure and carry out its correct connection in accordance with the manufacturer's recommendations.
2. Clean the pipeline and heated towel rail with a cable. It is advisable to pre-fill the system with chemicals of corrosive quality.
3. Replace fittings with models with large internal clearance so as not to impede fluid flow.

Which of the permanent problems can be fixed with your own hands and what to do if an American is flowing

In case of metal corrosion, water hammer, incorrect installation of the battery or factory defect, you should contact the master. But most of the problems of water flow at the junction of the main pipe and the heated towel rail are solved independently, after turning off the water supply. For example:

1. If there is a small leak at the junctions under the union nut, then the reason may be the weakening of the American - you need to carefully tighten (but not overtighten, so as not to damage the thread) the nut with a suitable wrench.
2. If the leak could not be eliminated, unscrew the American and check the rubber gasket. If necessary, replace the worn part with a new one.
3. If there is no gasket or a piece of rubber at hand, from which a suitable part can be cut out, wrap a piece of linen cloth around the thread, apply sealant on top and let it dry. Then screw the clamping nut into place.
4. If the cause of water leakage was steel wear (at the joints of the heated towel rail welding or in the pipe itself), a “clamp” made of a suitable piece of metal will become a temporary solution to this problem. After installing the "clamp" it must be welded.

Important! Before starting work, you need to warn the neighbors from below about possible unforeseen situations (if you fail to fix the leak with your own hands, you can break the thread of the nut or damage the pipe) and turn off the water supply in the apartment

Why is the heated towel rail cold?

There is a heated towel rail in every home. This part prevents mold, fungus and condensation from appearing in the bathroom, and also serves as a dryer for towels and other things. But sometimes it happens that the heated towel rail does not heat up or even becomes cold.

And there are several reasons for this, which we will discuss below. Why is the heated towel rail cold? As you know, there are two types of models - electric and water. And if the lack of heat in the first case may be due to a lack of power or equipment failure, then in the second case everything is much more interesting.

The heated towel rail does not work after the hot water is turned off quite often. She gets there only when the tap is open. In such situations, it is unlikely that the breakdown will be corrected, and the best option would be to replace the water appliance with an electric model.

What to do if the heated towel rail in the bathroom does not work? Having determined the source of the problem, you will need to repair the device as soon as possible. But doing it yourself is recommended only in those situations where you have the appropriate knowledge and skills.

And if there are none, then you will need to urgently contact a specialist who will restore the device to working capacity again, eliminating the malfunction. The reasons for a cold heated towel rail in the bathroom can be different. Sometimes devices stop giving off heat due to improper connection to a common line. Most often this happens when connecting to old thermal communications, where everyone changes the principle of connecting to the riser, guided by the reason "It's so convenient for me."

In such cases, you will need to contact the Housing Office, since it is unlikely that you can fix everything on your own.

The acid softens the remaining sediment, and after draining it will be easy to remove.

Troubleshooting depending on the type of heated towel rail

Bathroom dryers are available in different types. They differ in size and shape, as well as in design. They can be electric or water. Malfunctions in their performance can be different, therefore, the repair of electric towel warmers will not differ significantly from the repair of other types of structures.

Electric

Repairing electric heated towel rails is considered a simple process if you carefully understand it. The structures contain a heating element that is connected directly to the power supply system of the whole house or apartment

Initially, it is important to determine the cause of the breakdown, for which certain tools are used:

• a tester represented by a measuring device;
• special indicator screwdriver.

With the help of these elements, the electrical supply circuit is checked. For this, an indicator is used to check the phase of the heating element.Even if there is phase voltage, this is not always a reason to say that the supply is correct. The fact is that often there is a break in the neutral conductor. It is he who can cause poor-quality work of the heated towel rail, so the ladder can heat, but not too well, so it does not cope with its main purpose.

If voltage problems are detected, then reconnection is carried out with a preliminary study of the instructions

If all the work is done on your own, it is important to act carefully, and also take into account safety requirements, since you have to perform actions with an electrical appliance

Water

The most common cold water heated towel rail, so you need to understand the cause of the breakdown, after which it is effectively eliminated

It is usually quite difficult to determine the cause of a breakdown, since it is important to understand the device of this design.

It can be a dead-end or looped system. The first consists of a single pipe, and is considered effective only for small structures or various industrial facilities. Water comes directly to people directly, so if the tap is often blocked, the water will become cold. To get hot water, you have to drain it a little.

A looped system, otherwise called a circulation system, does not have this significant drawback. It is installed in various apartment buildings and other large buildings. Therefore, the apartments have both a pipe through which hot water flows, and a return line for the process of circulation of the coolant. Water moves in a circle.It is in this system that the installation of a heated towel rail is most often carried out, and it is installed in risers.

If the heated towel rail does not work, then it is important to understand the connection diagram, which can be:

• direct, when the heated towel rail acts as a direct continuation of the water supply;
• with a bypass, and here you have to spend significant funds on the purchase of components, and water enters in the process of its circulation, but the device does not act as a continuation of the system.

Each cause of failure has its own characteristics, therefore, the repair is carried out by specific actions:

• blockages - they occur in the process of circulating water through the heated towel rail. The water is usually of poor quality, and it also contains a lot of impurities that lead to blockages. To eliminate this situation, it is necessary to remove the device, after which it is washed, and it is also desirable to clean the pipes of the system itself. To do this, you can apply mechanical forces or use special chemicals to remove blockages;
• incorrect connection scheme - often people prefer to install this plumbing fixture on their own, but they do not have the necessary knowledge, experience and skills, therefore, incorrect installation is performed. Most often, the structure is mounted at a considerable distance from the riser. This leads to the appearance of significant water resistance, so it simply does not enter the device. To eliminate this situation, it is necessary to move the device closer to the riser, and it is also allowed to install a special pressure pump into the system. It is he who contributes to the creation of the necessary pressure;
• there is no water circulation - this reason is considered the most difficult, and it is impossible to eliminate it without a complete change in the system.

If there is the latter reason, then in order to correct it, you will have to obtain a work permit from the management company.

Hot water comes out, but the heated towel rail does not heat

Why isn't the towel warmer heating up? The reason in most cases is the presence of traffic jams and blockages. Most consumers have installed heated towel rails for a long time, and accordingly they are unlikely to realize that this device needs to be cleaned on a regular basis.

Why a cold heated towel rail in the bathroom? In the event of a malfunction, there will be little bleeding. You will need to close the water supply tap, dismantle the device, clean it with a wire with a brush at the end, and then flush the system.

The acid softens the remaining sediment, and after draining it will be easy to remove.

After carrying out the indicated procedures, the heated towel rail is installed in place and connected to the system, and then the water supply tap opens, and the device should start to warm up.