DIY vailant boiler gas valve repair

In detail: do-it-yourself vailant boiler gas valve repair from a real master for the site my.housecope.com.

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The proprietary sensor is located in the block with the ignition device and costs over 800 (.) Hryvnia. Chinese sensor, more.

Video (click to play).

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Wall-mounted gas boiler Vaillant: replacement of the heat exchanger of the Vaillant boiler (Vaillant boiler). If the hot one does not flow well.

Wall-mounted double-circuit gas boiler Vilant has several options for malfunctions. Most of them are caused by misuse. But there are also more difficult situations that can be solved only with the help of constant prevention and diagnosis.

Malfunctions of the Vilant gas double-circuit wall-mounted boiler are divided into several groups, due to the occurrence of malfunctions.

improper installation and operation;
lack of prevention;
breakage of parts;
malfunction of the electronic system.

If necessary, all problems can be eliminated very quickly. To do this, it is enough to know the main faults and error codes, which will be reflected on the electronic scoreboard.

Important! In the absence of the required experience, a full-fledged repair should be carried out by a specialist who will immediately identify the cause of the malfunction and eliminate it.

Vilant double-circuit wall-mounted gas boilers have several common problems:

Important! When installing the equipment, diagnostics should be performed by a specialist or a person with experience, as this will help to avoid most of the errors.

During installation, diagnostics must be carried out in advance, which will identify all the problems. This procedure is mandatory. Most of the problems are related precisely to improper installation and operation. In addition, breakdowns are also more likely to occur under these conditions.

It is worth considering that malfunctions can be caused by a variety of reasons, including mechanical damage or a failure in the electronic control system. Most problems will not show up with annual maintenance and proper operation.

It is also worth considering that in case of a number of breakdowns, the electronic scoreboard will not work. For each specific case, a different way of eliminating the negative factor is used.If you do not understand what the problem is, then it is better to contact specialists who will fix the problem without additional damage to the equipment.

There are some expert tips to take into account. In particular, a number of tips are related to the prevention and initial use of the boiler. Recommendations:

the model must meet the needs of the heating system;
connection must be made strictly according to the instructions;
any small deviations from the duty cycle should be checked immediately;
before the first working start, diagnostics should be carried out;
the installation of the equipment is carried out by professionals; otherwise, malfunctions may occur during the first working cycles.

Important! A boiler of any type must be fully serviced. Otherwise, over time, the duty cycle will begin to deteriorate.

During operation, most users have questions that can only be answered by specialists. Also, for each question there is an answer that allows you to solve the problem. Advice:

If there is no reaction to the inclusion of water and a set of sounds that come from the equipment itself, it is worth checking the gas supply line, as well as the gas meter.
In case of pressure jumps that occur due to the expansion tank, it can simply be pumped up.
If the pressure sensor does not work properly, error F75 pops up. To eliminate, you can simply press the feed valve.
With alternating shutdown of equipment and supply of either hot or cold water, it is worth setting the minimum pressure.
With delays in switching the boiler from one mode to another and sounds that look like gurgling, it is required to pump out excess air.
In addition to water, you can only use a coolant specially selected for the boiler. There should be no other liquids.
When the equipment stops completely and the panel fades, it is necessary to check the fuses.
If the icon flashes with a flame and there is no inclusion, you need to clean the filters and check the sensors.
If there is a good pressure of cold water, but hot water does not go well, then you will need to check and change the heat exchanger.

There is one more nuance worth considering. The factory settings are set to the maximum value (not always, but often). If you have a smaller area, it is worth reducing the power. This procedure should be carried out after connection at the first diagnosis.

Different error codes may appear on the display, but, at the same time, the problem can be complex. The error that prevents the equipment from switching to operating mode is displayed.

After identifying the shortcomings, their elimination is required. Further, a complete inspection of the equipment and adjustment is carried out. After that, diagnostics are started, which should check all modes and capabilities of the boiler.

Only after all these procedures can the equipment be put into operation. It is also important to carry out the necessary cleaning after repair or troubleshooting.

There is an important nuance. If the boiler is not regularly maintained, problems with filters and chimney may arise. That is why the maintenance procedure implies not only the change of parts, but also the complete putting of the equipment in order.

Most often, all problems during operation are displayed on the display. It is these signs that are required to navigate in the first place.

The most common errors on the scoreboard are F22, 28, 29, 36, 75. But in fact, there are a lot of errors that are displayed on the screen using codes. Most of the codes will not appear even for the entire long-term period of use, but there are several errors that can occur if used improperly. These include errors like:

F0 or F1 - a check of the cable and the NTC sensor, which controls the temperature regime, is required;
F2 - sensor failure or cable break;
F5 or F6 - incorrect operation of the sensor, which removes combustion products in a safe way;
F10 - short circuit on the line;
F13 - the temperature regime of 130 degrees was exceeded, which led to a failure in the system;
F32 - poor fan performance.

There may be a lot of errors and codes for them, but everything can be found in the instructions. The Russian-language manual contains a list of the most common codes. Less common, but still encountered, are errors:

F11 - indicates that there has been a short circuit of the temperature sensor installed in the return line;
F12 - this type of error appears only if the water heater sensor is closed;
F15 - a short circuit occurred in the outdoor flue gas sensor;
F20 - this type of error appears if the overheating sensor was poorly connected or it is inoperative. The error indicates the activation of the overheating protection, which occurs in such situations;
F23 - this code appears if there is not enough coolant in the unit and because of this there is a big difference between the readings of the sensors of the incoming and return lines. To eliminate this problem, it is enough to check the correct connection of the sensors, the performance of the pump, as well as its condition, since it can be damaged or blocked;
F24 - insufficient amount of coolant in the boiler itself. In such a situation, the temperature rises sharply. This may be due to insufficient pressure in the system itself, low pump performance or blockage;
F61 - the control signal to the gas valves is interrupted. In such a situation, you need to immediately check the valves or electronics, they may be faulty.

When these and many other errors appear on the display of the device, you must immediately diagnose it and eliminate all errors in order to prevent its failure.

Even despite the high quality of the product, over time it can be subjected to various damages, which can be recognized by means of various error codes displayed on the device's screen.

All codes must be treated carefully, deciphered and immediately eliminated all problems, otherwise the device may quickly become unusable. To prevent the appearance of new errors, you can call a wizard who can replace the broken parts.

Modern gas boilers are quite sophisticated technological equipment. With proper care and proper handling, the gas boiler will serve for a long time without any interruptions. However, even the most expensive and functional equipment has its own resource, after the exhaustion of which all sorts of malfunctions begin to appear.

DIY gas boiler repair

Knowing the main causes of malfunctions and the procedure for eliminating them, you can repair your gas boiler with your own hands. This is a very painstaking, responsible, but in most cases relatively easy job.

Contents of step-by-step instructions:

First of all, it is necessary to establish why any malfunctions may occur in the operation of gas heating boilers. A number of different factors can lead to problems.

Modern gas boilers are equipped with various automation equipment. These funds, in turn, are powered by electricity. And, despite the fact that the 21st century is already in the yard and systems for the use of alternative energy sources are being actively developed around the world, the problem of stability of power grids remains relevant for many regions, especially for remote villages and all kinds of summer cottages.

A sudden power outage or a strong surge in electricity is one of the main enemies of any modern gas boiler.

To avoid all the accompanying troubles, buy a quality stabilizer in advance.Do not spare money to buy this device - there is little sense from cheap models, so it is better to immediately allocate funds to purchase a good stabilizer from a well-known manufacturer. Be sure that in the event of a breakdown of the automation, you will spend much more money on its repair and replacement.

At home, wall-mounted models of gas boilers are often used. Such devices are simultaneously responsible for both space heating and hot water preparation.

The design of wall-hung boilers includes a flow-through heat exchanger. Low-quality hard water with various impurities is the main enemy of the heat exchanger of a gas boiler. At the same time, under the influence of low-quality water, the heat exchanger can fail in just one season.

Install special filters to prevent such damage. The best option is a complete water purification system. With it, your boiler will work as long as possible, and using purified water is much safer for health.

Any knowledgeable person will tell you: only qualified specialists should be engaged in the installation and piping of gas heating equipment.

Even the slightest mistakes at the stages of installation and connection of equipment can lead to irreversible consequences. For example, an incorrectly executed piping in the case of a cast-iron gas boiler more powerful than 50 kW will lead to the fact that the unit will simply split at low temperatures.

If you are not an experienced gas operator, entrust the boiler installation to professionals.

Therefore, if you are not an experienced gas operator, entrust the installation of the boiler to professionals - this way you will save yourself from many problems in the future.

Unfavorable weather conditions can also lead to the appearance of many different problems. In frosty winters, people turn on the heating at almost full capacity. This leads to a significant decrease in pressure in the gas pipeline system. As a result, boilers cannot fully realize their potential.

You will not be able to solve this problem on your own - you still cannot explain to your neighbors that by their actions they only aggravate the situation. As a solution to the problem, you can install an additional boiler that runs on a different fuel.

Automatic solid fuel coal-fired boiler with hopper

A modern gas boiler is a complex and potentially dangerous system. The main danger of such units is the risk of a gas explosion in the event of improper handling of the equipment or untimely elimination of various malfunctions.

Various kinds of automation are responsible for maintaining the operation of the gas boiler at an optimal level. An inexperienced user is often unable to understand its device. Therefore, it is better to immediately invite specialists to troubleshoot serious problems.

On your own, you can try to eliminate only visible damage and various contaminants that have led to the failure of the pipe, chimney and other parts of the boiler.

Typical malfunctions of gas boilers

There are a number of typical problems that you can fix yourself in most cases. Problems will also be listed, in the event of which you can only protect yourself before the arrival of a specialist.

If a distinct smell of gas or smoke appears in the room, immediately turn off the boiler and leave the room, opening it for ventilation.

Gas boiler functionality diagram

Call a professional immediately. Trying to solve the gas leak problem on your own without the necessary skills is extremely dangerous and unreasonable.

If the flame sensor or the gas supply pipe breaks down, turn off the boiler, close all gas valves and let the unit cool down completely.

Return to the area after a while to check for the smell of gas.If everything is in order with the draft, try to turn on the boiler again. If there is no thrust, immediately call a repairman.

Overheating is one of the most common problems in modern gas boilers. The reason for this may be a malfunction of the automation equipment or a clogged heat exchanger.

It is impossible to cope with the repair of automation without the appropriate knowledge.

You can also clean the heat exchanger with your own hands. The most common materials for the manufacture of heat exchangers are copper and stainless steel. There is usually no problem cleaning them, but be extremely careful anyway.

Primary heat exchanger for wall mounted gas boiler Beretta

According to the recommendations of the manufacturers, the heat exchangers must be cleaned of soot every few years (each manufacturer indicates a specific interval in the instructions for their equipment).

Primary heat exchanger (heating circuit) of the gas boiler Rinnai SMF

To clean the heat exchanger, simply remove it and clean it thoroughly with a metal brush. In the case of a copper heat exchanger, it is best to replace the brush with a metal sponge used for washing dishes.

The problematic place of fans is their bearings. If the fan of your boiler stops developing the set number of revolutions, try to eliminate the problem as soon as possible.

Fan (3311806000) for Daewoo gas boiler

To do this, remove the back of the fan, take out the stator and lubricate the bearings. Machine oil is fine for lubrication, but it is best to use a higher quality carbon compound with heat-resistant properties if possible.

Fan RLA97 (Aa10020004) for gas boiler Electrolux

Also, an interturn short circuit can lead to problems with the fan. Only a specialist can cope with the elimination of this malfunction. Return the stator for repair to replace the winding, or immediately replace the faulty unit with a new device.

Gas boiler chimney diagram

Often, excessive clogging of the coaxial chimney leads to the appearance of various malfunctions in the operation of a gas heating boiler.

Remove the chimney and thoroughly clean all of its components from soot. So you will not only return the previous level of efficiency of the unit, but also significantly increase the efficiency of the boiler.

The boiler can shut down spontaneously for several reasons. This usually happens due to a malfunction of the combustion sensor. This problem, in turn, most often leads to contamination of the gas pipe.

Draft sensor 87 ° C for Thermona boiler

Remove the branch pipe, rinse it thoroughly with water, clean it with a cotton swab and blow it off the remaining moisture. Put the pipe back in place and try to turn on the boiler. If it doesn't help, call the wizard.

No wonder they say: the best repair is prevention. Gas boilers require annual preventive maintenance, which must be carried out before the start of the heating season.

Whenever possible, maintenance should be carried out twice a year, before and after the heating season.

Check all the previously discussed boiler elements for their serviceability. Follow the preventive maintenance recommendations given by the manufacturer in the instructions specific to your boiler. Eliminate any malfunctions that arise in time, if possible.

Remember! A gas boiler is a potentially hazardous equipment. Incorrect use and untimely troubleshooting can lead to irreparable consequences. Therefore, be careful and do not engage in any repair work if you doubt your ability and correctness of action. Otherwise, follow the instructions provided.

Even if you carry out regular boiler maintenance and operate the equipment correctly, Vaillant equipment can still fail.Do not think that you have come across a fake or the Germans started making bad boilers. Like any other technique, it can also break.Before repairing the Vilant gas boiler without the help of a specialist, assess your abilities. If you "communicate with you" with technology, you can only advise one thing - even with minor failures, immediately call the wizard. You are not hammering a nail into the wall, but repairing serious equipment. One wrong step can put you and other residents in the house in danger.

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Those who are confident in their skills can be advised to make repairs on their own.New boiler won't start at all? Check if phase and zero are connected correctly. Air that has accumulated in the system can also interfere with the full startup of the boiler.The second common problem that the owner of a Vaillant boiler may encounter is insufficient flame level. In this case, boiler repair is reduced to the correct setting of the required gas pressure level. If the problem persists, we advise you to check the module on the gas valve, as well as the diode bridge. A complex reconfiguration of equipment can also correct the situation. To carry it out, use the instructions that come with the boiler.Read also: Furniture to order in Mr. Dors: advantages and featuresWhy does the burner go out immediately after starting the equipment? This symptom may also indicate that the gas pressure is too low. Try to lower the minimum pressure to 5 mbar. It is possible that after this procedure the boiler will start working correctly.Some owners of Vaillant boilers are faced with the problem of insufficient water temperature. Elementary, Watson - you just need to adjust the minimum and maximum values of the indicators.If a problem occurs in modulation mode, it makes sense to check the valve and board. But if the sensor readings are inaccurate, the elements may need to be replaced.A fairly common problem with many Vaillant units is filter clogging. The poor quality of the coolants is to blame for everything. Check the filter periodically - and you will need to buy vaillant parts much less often. Even if the need arises, always purchase original components. Although they will cost more, they will last much more.The problem is this: the boiler gives an error F28 and F29. I disassembled the stepper valve, cleaned it from dirt, wiped it with alcohol. The problem was removed, but a month later the picture repeated itself, again removed the valve - it is full of dirt, similar to plastic shavings. Why is this happening?... look for the cause in the boiler itself and, if not on your own ... what ...... The gas valve may not be adjusted manually, but when ...hello. I have a vailant boiler. every time the burner turns on, a third-party sound is heard. three years of operation of the boiler. this sound comes from the side of the gas valve .. tell me what it can be. and so there are no more claims. Thank you.it works fine only this sound appears.the boiler gives an error F 28, after firing up it works for a while (several hours) and goes out again, gives again an errorHow to adjust the gas valve on the Navien Ace-35k boiler so that the nozzle burns quieter (reduce the gas pressure)?error 28 on vaylant how to fixBOILER GIVES ERROR F.28 after firing up it works for some time and goes out and gives error F.28Disassemble the gas valve, clean it, lubricate the hex shaft with silicone oil and you will be happyA finished home is always easier to find than to build from the very beginning. They built a house for me from turnkey blocks, I gave 45 thousand dollars back in 2011. There are many different firms, depending on what area you live in, you can find a good one, but be sure to do monitoring.Vailant atmotes boiler 24 kW. when hot water is opened, a spark is supplied to the electrodes and the burner does not ignite, after three attempts, error f28, reset does not help. what could be the reason.When opening a hot water tap, the burner does not light up every other time with a crackling ignition. after two times f28If in frame houses you build ovens from brick ovens from brick ovens from bricks, then the house will be no worse than a lumber one.How to adjust the gas valve on the Navien Ace-35k boiler so that the nozzle burns quieter (reduce the gas pressure)?Yes, the installation of the insulation system can be carried out in winter conditions.User dated January 22, why did you decide so? In general, together with them, we created a project from scratch, and then we were already building on it. We did not use their version, because we wanted to get a very individual house.For the parents, Flotenk took him to the dacha, well, in my opinion, it has been worth almost three years, the parents are happy. To be honest, I don't understand them at all, but the guys from Megaskat have convinced that this is a good septic tank, there will be no problems. So far, everything is so))After gluing the wallpaper, I have vinyl on a non-woven basis, the walls under the wallpaper get very wet and black, the smell of dampness, the walls are insulated with foam on both sides, tell me what to do.In our village, a large poplar grows on the site, obscures the light of garden plants, and even takes up space. In addition, it is already old, it can fall in a strong wind. Husband .Good evening. I would like to hear your recommendations regarding the project of an inexpensive country house. This is the case. I am planning to build an inexpensive country house, but the project.I want to put an air conditioner at home so that the air is better, but I don’t know how to put it in the room. Tell me how to position the air conditioner in the room?We are building a wooden house from a bar outside the city, we are already dreaming of drinking tea at a common table. I see that the house has shrunk and the building is replete with gaps that will pass through.Bought a marble countertop for a bathtub under the sink. During transportation, the marble cracked, but it's a pity to throw it away, dear all the same. Maybe someone came across a similar one.You can buy the UP23-02 gas valve for the DGB-200 ICH boiler in ...The vaillant turbotec pro gas boiler is a quality boiler ...... and require replacement of the valve, because this is a defect in the boiler itself.Of course you are right, you need to change the valve or make it.

I have a problem with a boiler that only worked properly for the first year. Then it happened ...It is possible that my question will seem ridiculous to specialists, but I want to understand how ...... give when the gas valve directly examines the subject ... will have to ...... to see reviews of the vaillant gas boiler, then I advise you to visit the wonderful ...Boilers of the atmo and turbo series actually differ in the way they remove combustion gases. In the first case, gases are removed naturally, in the second - forcibly using a fan (turbine).There are other letters in the boiler labeling: pro and plus, VUW and VU. Sometimes it becomes necessary to understand which specific version of the boiler is installed. The Pro model is a simplified (economy) version of boilers, supplied only in a double-circuit design.lack of hot start function (Aqua-Comfort system);a smaller secondary heat exchanger (13 plates instead of 19);manual regulation of the circulation pump;open front panel with smaller display.A single-circuit boiler is marked with VU, a double-circuit VUW.Functionally, boilers with an open combustion chamber are distinguished by the presence of special AtmoGuard sensors in the smoke exhaust system and a draft stabilizer, because the ingress of combustion products into the room is unacceptable. The control is very simple: the temperature sensor is located in the space between the draft stabilizer and the combustion chamber and, for example, when the draft is overturned, the flue gases will certainly change its temperature, which immediately fixes the control board and stops the boiler after 2 minutes.Gas boilers with an open combustion chamber, despite all the protections, are recognized in the European Union as unsafe and prohibited for operation.In a boiler with a closed chamber, a collector of waste gases is used, which are forcibly removed by a fan (smoke exhauster) and the presence of traction is controlled by special devices (for example, a Venturi or a Pitot tube).

Image - DIY vailant boiler gas valve repair

Before filling, it is necessary to thoroughly flush the heating system (large particles remaining after installation work can damage the actuators)

check the condition of the automatic air vent on the circulation pump, if it is closed, unscrew it by 1-2 turns

shut-off valves on radiators or thermal heads must be fully open

fill the heating system to a pressure of at least 1 bar (usually 1.3 - 1.5 bar)

turn on the boiler and check the pressure, if necessary, also top up the system

be sure to check the gas deflector for leaks

Vaillant requires the system to be filled with treated water with a hardness not exceeding 20 German units and prohibits the addition of antifreeze or corrosion inhibitors to the system.

After the system is full, it is necessary to carry out the P0 bleeding program, in which only the pump will operate in a specially provided mode, and excess air is removed from the heating and DHW circuits.

For further normal and safe operation, as well as maintaining the warranty, any equipment requires compliance with a number of conditions:

the voltage in the network according to the rules of the PUE and the obligatory grounding of the boiler (ideally there should be no potential between zero and “ground”, Vaillant allows no more than 1.5 Volts)

compliance of the system as a whole with the capacity of the installed equipment (lack of capacity for heating or hot water supply prohibits starting). Constant operation of the boiler at the power limit will quickly lead to the failure of the unit.

verification of compliance with the chimney installation standards (for atmospheric boilers, there is a draft, for coaxial chimneys, the chimney is protruded and tilted towards the street)

The installation manual also prescribes the installation of a coarse filter on the cold water supply to the boiler and on the return pipe of the heating system, as well as a gas filter.

It is better to study the commissioning process in more detail in the instructions for a specific boiler model.

The selection of the test program (airing, filling the system) is started by turning on the boiler and simultaneously holding the “+” button for 5 seconds. The selected program is activated with the “i” button. There are five preset programs for TEC boilers.

The gas boiler is recommended to be serviced annually. Basically, maintenance is reduced to visual inspection and preventive cleaning of the main components: heat exchangers, combustion chambers, coarse filters and the condition of the expansion tank.Clean the outside of the primary heat exchanger from soot with a soft brush. In no case should you use brushes with metal bristles, because the copper plates are treated with a special anti-corrosion coating and its damage will lead to a serious reduction in its service life. Due to the design feature, the primary heat exchangers from the inside in most cases cannot be flushed, its service life can be seriously reduced from the use of antifreeze or frequent replenishment with tap water of increased hardness.The secondary heat exchanger (DHW), due to the constant passage of water through it, is more susceptible to the formation of deposits and scale, but at the same time it can be successfully washed with a certain frequency. Heat exchangers are washed with special installations (boosters) using special equipment. The process consists in long-term (sometimes up to several hours) pumping of chemicals that help dissolve and wash out scale. Valiant recommends flushing with normal acetic acid.The expansion tank is designed to compensate for the thermal expansion of the heating system and is also subject to annual maintenance. It consists in measuring its pressure. The measurement must be done on an empty boiler and, if necessary, pumped up to the static pressure of the system (approx. 1-1.2 bar). If water comes out of the control fitting, this indicates that the tank membrane is not tight and that it needs to be replaced.It is imperative to rinse and clean the heat exchangers in a timely manner, because dirt and scale deposits reduce the thermal conductivity and flow area, which leads to a decrease in the efficiency of the boiler and overheating, and subsequently expensive replacement.It is recommended to set the hot water supply temperature so that it is not diluted with cold water, thus ensuring minimum heating. The lower the hot water temperature, the lower the scale formation rate.Coarse filters are nets, so their maintenance is reduced to removing and rinsing under running water to the desired state.A gas burner can become clogged and build up over time from combustion products and is usually easy to clean with a soft brush and vacuum cleaner. If there is heavy dirt, then it can be easily removed.

It should be noted that Vaillant equipment is one of the safest among all the others. The number of settings, parameters, checks here is significantly greater than in boilers of other brands. Boilers with displays can display status codes, diagnostics (two levels), faults and set-up programs. The average user will only be interested in the trouble codes, so everything else is mainly intended for service specialists.Also, the vailant automatics stores the history of all errors, this makes it very convenient to diagnose and troubleshoot the boiler. At any time, you can view the last 10 errors that were on the boiler (to display the list, use the "info" and "-" buttons).Next, we will consider the most common errors of Vaillant boilers and recommendations for their elimination.Occurs only in turbocharged boiler models. The source of the error is the pressure switch in the exhaust pipe. The logic of operation of all modern gas boilers is approximately the same. When a request for ignition is received, the control board turns on the fan (smoke exhauster), which creates a vacuum. When the required draft is reached, the contacts of the differential relay close and thereby a signal is transmitted to the board to open the gas valve and ignite the burner. Accordingly, if there is no signal from the relay, or it is in a closed state after the fan is turned off, the vaillant automatics generates error f33.Wilant cauldron error f33 causes:the fan does not work (can be checked visually)breakdown of the pressure switch (condensate can accumulate in the tubes, which, flowing down into the sensor, makes it unusable;an error in the installation of the exhaust pipe (condensation can also accumulate and flood the relay)clogging of coaxial pipes, preventing normal air flowclogged pitot tube (accumulated dirt or insects) Image - DIY vailant boiler gas valve repair

You can check the operation of the relay by creating your own vacuum through the tube (a characteristic click should occur). It happens that the relay "sticks", i.e. in the normal state, it will be closed, which can be checked with an ordinary multimeter. In this case, it will have to be replaced.

It happens that the tubes themselves or the pitot tube are damaged, for example, from exposure to high temperatures.

The slightest change in shape can affect the readings and cause error F33.

It is worth noting that this is a problem for almost all gas boilers. Some manufacturers solve it by installing a special widening (this is what BAXI did) to collect condensate, and some even make heated tubes to evaporate it.

This error can occur both accidentally and require the intervention of a service technician. Error f28 occurs when unsuccessful attempts to ignite the gas burner.

What could be the reasons errors f28 boiler wilant:

no gas is supplied to the burner

low gas pressure at the gas valve outlet

defective gas valve

problem with ignition electrodes and flame presence electrode

incorrect earthing of the boiler

malfunction of the electronic board (repair of the boiler board is possible)

To begin with, you can use the Clear error button (flame with a cross). Perhaps the ignition failure was accidental and the operation of the boiler is returning to normal.

If error f28 appears again, we recommend calling a service technician, because further checks will require special equipment and knowledge. It is not recommended to disassemble the gas valve yourself.

You can check the integrity of the wires going from the electrodes to the control board and, at the next start-up attempt, visually check that the electric spark pierces exactly on the burner body, and not somewhere else.

Service specialists check that the boiler is properly grounded and that the electrodes are in good working order, as well as the pressure at the outlet of the gas valve. If all the nodes are normal and there are no violations, then it is more likely that the diagnostics of the electronic board will be required.

It is not worth changing the control board right away. In most cases, it can be repaired successfully. Repair will cost significantly less.

If the boiler display does not light up, while you are sure that it is securely connected to the mains, then most likely the board has broken. Unfortunately, the self-diagnosis program does not record internal errors in the operation of the board, and in case of damage, the boiler will simply go out. Quite often, this damage can be seen visually when examining the board.We have everything you need to rebuild the boards of TEC and MAX boilers. Here is an example of repairing one such case (the power module burned out on the board):The refurbishment was completed within a day and the fee was passed on to a satisfied customer.Vaillant is a high-quality and reliable technique, but electronics breakdowns still sometimes happen. The boiler board is one of the most expensive elements of it, therefore, turning to us, customers save an impressive amount of money. We have been doing repairs for a long time and all spare parts are always in stock, and repairs take a minimum of time, which is especially important when a breakdown occurred during the heating season.It is not always possible to answer all important questions in one document. Therefore, if you did not find what you were looking for or if you have any questions, you can ask them here: