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It is very unpleasant when, in the middle of winter, some problems begin with heating equipment in a private home, for example, with a gas boiler. According to Murphy's law, the heat source begins to mope on the coldest days, when its shutdown leads to a rapid cooling of the coolant in the system, and after it, the entire building.

The first thing that comes to mind is to call a specialist who will solve your problem. The idea is correct, but due to many reasons, the arrival of a specialist may be delayed for several hours, or even days. Instead of slowly freezing, try to find out the reason why the gas boiler goes out and fix the problem yourself. We will tell you what to do in such a situation.

Why does the gas boiler burner go out?

The answer is simple - the fuel supply is shut off by reliable automation installed on all heating units using natural or liquefied gas. The burner will turn off and the gas boiler will go out in any of three cases:

the draft in the chimney has decreased or disappeared;
the gas pressure in the supply line has dropped below normal;
the flame of the burner itself went out.

For reference. Gas valves from the Italian EuroSIT or the American brand Honeywell act as automatic shut-off devices.

The automation can work either due to external factors or due to the breakdown of any part of the heat generator. In this regard, it is easier to deal with non-volatile floor-standing boilers of simple design, since there is literally nothing to break in them, and the burner more often goes out due to external reasons than from malfunctions. These include the brands Danko, Zhitomir, Aton, Ross and other manufacturers of gas-using devices from the countries of the former USSR.

Gas valve EuroSit (right) and Honeywell (left)

A more modern wall-mounted electric gas boiler, equipped with a closed combustion chamber, is a miniature boiler room equipped with additional protection stages that shut off the fuel supply in the following situations:

the movement of coolant in the heating system has stopped (the flow sensor is triggered);
the air supply has decreased or stopped, as indicated by the pressure switch (another sensor);
power surges occur in the home electrical network;
during a power outage.

Note. At the moment, only one Russian manufacturer offers high-quality wall-mounted boilers - Neva; the rest of the market is occupied by imported brands from Europe and Korea.

When a wall-mounted heat generator begins to go out, it is not easy to fix it, but a number of malfunctions can still be eliminated with your own hands. How to do this correctly - read on.

Preventive measures

To prevent damage to any boiler parts, special preventive measures are taken. Before the start of the heating season and after it, the unit must be serviced in a special way. If possible, it is disassembled and all components of the spare part are carefully inspected for damage. All faults must be eliminated, broken parts replaced with new ones or repaired.

The instructions for the device always include a list of preventive measures. must be strictly followed . The instructions for do-it-yourself repair of a Navien or Oasis mounted boiler contain information that you need to promptly remove all contaminants from the internal surfaces.

Due to the danger of gas boilers, you should not deal with problems yourself if you do not have any experience in repairing units. It is better to entrust the repair of the device to a specialist who will accurately identify broken parts and repair or replace them with new ones. During operation and maintenance, you must follow the manufacturer's instructions.

Damping of boilers with an open combustion chamber

By default, we consider a situation where the heating unit has worked for several seasons without complaints, and now for some reason it has begun to go out. An extended list of reasons that cause an automatic valve to stop supplying gas looks like this:

the draft in the chimney disappeared;
there were problems with the supply of natural gas, causing its pressure in the pipe to drop below normal;
the boiler does not have enough combustion air, causing the flame to go out;
the burner is blown out by a strong wind outside or the flame breaks off due to a strong draft inside the house;
hardware malfunctions of the gas boiler - failure of the draft sensor or thermocouple.

Lyrical digression. Home owners may not immediately notice the attenuation of the gas burner device, especially when the unit is installed in a separate room. The problem is discovered when the air temperature in a private house has already dropped.

So, if your main boiler burner goes out, then look for the reason in the specified sequence, starting with checking the draft in the chimney. Let's look at each step in detail.

Traction problems

The first thing that owners of atmospheric gas boilers should do when the burner goes out is to check the draft. Take matches or a candle, light it and bring it to the viewing window and observe the behavior of the flame. If it deviates towards the opening, then everything is in order with the thrust and you can move on to the next step.

If the flame does not deviate, then there is no draft in the chimney

The fire remained motionless; the cause of the burner extinguishing was discovered; the draft in the chimney disappeared. Your actions:

Open the window to the boiler room slightly so that air flow is guaranteed into the room.
Disconnect the section of the chimney connected to the outlet pipe of the heating unit, and then check the presence of draft in the chimney pipe itself. If there is one, you need to disassemble and clean the gas boiler itself, which is discussed in a separate article.
If no draft is detected in the main channel, then it is probably clogged. Find the hatch for maintenance and cleaning; it is located in the boiler room below the connection point or on the street. Open the hatch and insert the mirror inside to see the exit hole. If it is not visible, then the chimney must be cleaned.
Inspect the outside of the pipe head; a bird's nest may have appeared there during the summer. Another option is complete freezing of the cap covering the cut of the chimney. This happens during severe frosts, when ice blocks the working section of the chimney.

Iced chimneys with caps

Important! The operating rules for gas-using installations directly prohibit placing umbrellas on top of chimney pipes. If you have such a cap, it must be dismantled. Only open tapered nozzles may be used.

Briefly about the reasons for clogged smoke ducts:

uninsulated brick walls are destroyed by condensation, causing the flow area to become clogged with construction debris;
in cheap sandwich chimneys, the zinc coating can peel off from the inner wall and block the channel in the form of a thin film;
2 boilers are connected to one chimney - gas and solid fuel, so it is clogged with soot;
Foreign objects from the activity of birds may get into the pipe.

There is not only a lot of soot in the chimney, but also birds

Cleaning the pipe may not work when its walls freeze through at low outside temperatures. The fact is that the combustion products of gas heat generators have a relatively low temperature (up to 120 ° C) and are unable to warm up the chimney so that a stable draft occurs. Since you won’t be doing insulation in the middle of winter, there is only one way out - buy a disposable torch with a can, light it and stick it into the open cleaning hatch. When the frozen channel warms up, start the boiler, but do not turn it off for a long time, otherwise the procedure will have to be repeated.

Food for thought. There are situations when a two or three-story cottage is being built on a neighboring site in close proximity to your home. As a result, the chimney may enter the leeward zone of a neighboring building, and this leads to a decrease in draft, as a result of which the gas boiler goes out. Since you cannot prohibit your neighbors from building, you will have to increase the chimney by 1-2 m in order to remove it from the stagnant zone.

The simplest and cheapest way to combat wind blowing into a problematic chimney is to install a damper at the outlet of the gas boiler. True, if weather conditions change, its position will have to be adjusted, because with a half-blocked channel cross-section, the heater will not reach the optimal operating mode, and fumes may enter the house. Therefore, the best way to overcome draft overturning is to increase the chimney by 1-2 m.

Reduced gas pressure in the line

After making sure that there is draft in the chimney, proceed to the next step - checking the fuel supply. A sign of low gas pressure at the inlet is the burner going out for no apparent reason, and the flame on the boiler igniter continues to burn. What can be done:

Check how well the gas flows from the pipeline. First, close the door to the boiler room, open the window and unscrew the supply hose from the heat generator pipe. Briefly open the gas valve. A sign of a good delivery is a loud hiss from the hose and a strong smell of odorized methane. Reinstall the hose and check the tightness of the joint with soapy water.
If the fuel supply is poor, clean the gas strainer and then try to light the wick and the main burner of the boiler. If the result is negative, call the appropriate service and call a gas technician.

Attention! Before performing any manipulations with the fuel pipeline, be sure to turn off the gas shut-off valve!

On the way to your heating unit, the line may become clogged in one more place - inside the gas meter. This happens after repairing external pipelines, when rust or scale from welding gets into them. But it is prohibited to disassemble the meter for cleaning; only calling a specialist will help.

Why does the Danko boiler light up but quickly go out?

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Can anyone help solve the following problem. A Danko parapet gas boiler is in operation. When you light it, the main burner burns well, but after 15-25 seconds it turns off. Repeated action does not produce changes. Has anyone encountered this? The first step is to check the thermocouple and draft sensor. Check the circuit connections. Carefully disassemble the ignition burner device and blow it out. Adjust the burner by reducing the gas pressure. Perhaps the draft has deteriorated, so the igniter has insufficient air to ignite the main burner.

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All reasons for the extinguishing of a gas boiler

When using an autonomous heating system at home, automatic or mechanical devices are used that operate from different types of energy. When there are power outages, the boiler stops functioning. The same can happen with frequent surges in voltage. And this is one of the main reasons for the boiler to fade.

Low pressure

Burner wick extinguishing can occur on any boiler, regardless of the cost of the device itself. If the gas pressure in the system decreases, the burner will certainly go out, it’s only a matter of time. To determine the cause of the problem, you must first inspect the gas pipeline.

To detect a leak, you need to pay attention to where the unpleasant odor occurs. But you should not try to smell the source of the leak, otherwise the risk of gas poisoning will increase.

The joints where pipes are connected to gas equipment must be generously treated with soap foam. Bubbles will begin to form where the leak occurs.

Chimney problems

If the gas appliance begins to fade, you need to carefully inspect the chimney. If the weather conditions are bad outside, a lack or excess of traction may occur. This is explained by the fact that the boiler operates unstably in wind or rain, as they penetrate into the chimney. As a result, the gas device goes out. To fix the problem, you need to install protective elements on the pipe.

The next step in troubleshooting a chimney is to check it for burnout. If the equipment is old, it can be seriously damaged. In this case, you will have to completely replace the entire chimney. The problem can occur on any equipment (for example, a Danko boiler or a Siberia boiler)

Insufficient fan draft

If the boiler begins to fade, it is necessary to check the draft inside the system. Gas boilers Aton and Lemax often suffer from this. To check this nuance, you will need to light a match or candle and bring the flame to the viewing window.

If the traction is not enough, you need to take the following actions:

If the boiler operates on forced draft through the operation of a fan, then you need to climb onto the roof and see if it is broken. It is possible that debris has gotten into the blades and the fan has jammed. If the device is working properly, then you need to move on to the next step.
Open the window that leads to the boiler room so that air can flow into the room. Disconnect the part of the chimney that is connected to the outlet pipe, and then check whether the draft remains in the chimney pipe itself. If it is not in the main channel, then it is clogged and the fan cannot cope with the load because of this.

Tips for proper operation of a gas boiler

Any equipment wears out when used for a long time. Therefore, when purchasing, it is necessary to carefully study the instructions and main elements in order to know what may break. Knowing the design, you can determine which part has failed. The boiler will go out in a strong wind, and therefore it is advisable to cover the chimney with protective caps. If the gas boiler (Conord, Mimax or other popular types) is still under warranty, then the manufacturer should not repair it himself. In this case, you need to contact a specialist who will carry out the appropriate repairs.

If you use the equipment correctly and follow the recommendations of specialists and follow safety precautions, then problems with attenuation can be avoided or eliminated on your own. If the damage is serious, you will have to contact a service center, where the failed parts will be replaced. This information will be enough to understand what to do if the gas boiler goes out.

The prospect of being left without heat in the cool autumn and frosty winter period will not please anyone. If this happens, then in the best case, the room can return to a comfortable temperature within a few hours. After all, it takes time for the master to arrive when called.

To quickly resolve the problem, it would be a good idea to learn how to identify and eliminate the cause of operational irregularities yourself. You need to figure out why the gas boiler goes out and try to get rid of at least basic faults yourself. We'll tell you how to find them.

Of course, no one forces you to dismantle equipment or change a part yourself if you have neither the tools nor the training to do so. However, information about simple and affordable repair operations will come in handy. In addition, they will help monitor the actions of gas workers, not all of whom are quite experienced and competent.

Cleaning a Danko gas boiler

Doesn't light, igniter doesn't start. Problem with Eurosit automation Repair at home.

We managed to solve the problem with the igniter ourselves. It's time to clean the igniter pipe. Today this is the most common ha.. How to check the solenoid valve of a gas boiler.

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How to check the solenoid valve of a gas boiler? Checking the valve is very easy in just a few minutes.

The model has a built-in water heater - it can be used to heat a private home and heat hot water. Appearance: Rectangular shaped cabinet. The facade is equipped with a door that closes and provides access to the elements responsible for ignition.

What to do if the gas boiler is clogged with soot? Cleaning a gas boiler from soot.

Why might the burner go out at all?

The boiler extinguishes as a result of the device’s automatic operation, which responds to the following disturbances in the operation of the system:

the draft in the chimney has decreased or disappeared;
the gas pressure in the supply line has dropped;
The flame in the burner has gone out.

Moreover, these processes can occur both due to internal failure and due to the influence of external factors.

If we consider floor-standing models (manufacturers: Danko, Aton, ROSS, Zhitomir), then they have a primitive internal design. Therefore, if you look into them, there is nothing special to break in them. Attenuation in this case occurs most often due to strong wind outside or other external factors.

But wall-mounted gas boilers in their design already resemble an autonomous mini-boiler room, and therefore there may be more options for stopping the operation of a gas boiler:

the coolant circulation was interrupted or did not start after repairing the circuit (the flow sensor reacts);
The air supply has decreased/stopped (the pressure switch is triggered);
voltage drops occur;
power outage.

If a mounted heat generator goes out, it is not easy to restore its operation. However, it is still quite possible to eliminate some malfunctions on your own. Find out how to do this below.

Main causes of attenuation

If the equipment was working properly before, but now the automatic valve begins to shut off the gas supply, there may be several reasons. Depending on them, the ways to eliminate them will be different.

Decreased/disappeared cravings

Rule No. 1 in case of atmospheric boiler extinguishing: check the draft. This can be done with a match or lighter, which should be brought to the viewing window.

Further actions depend on the behavior of the flame:

if it deviates towards the combustion chamber, there is draft - everything is in order;
if remains vertical, there is no thrust.

It is important to remember to close the gas supply valve well. But that's not all.

Remove the part of the pipe that is connected to the outlet pipe and check the draft now in the chimney:

if there is one, you need to clean the boiler channels;
if not, you can limit yourself to cleaning the chimney.

What exactly needs to be cleaned? Where does pollution come from in the chimney? Natural combustion products accumulate in it in the form of soot and soot deposits, fallen leaves, and sometimes even the boiler goes out due to a flying bird!

If a blockage has formed at the inlet, it will not be difficult to clean it yourself. But if it’s at the top of the pipe, you’ll have to wait for a technician with tools (you may have to use access from the roof).

There is a backdraft in the chimney

Sometimes the boiler may go out due to reverse draft. This means that due to the blowing of the gas boiler by the wind, the smoke does not come out of the chimney into the street, but returns back to the firebox, thereby knocking out the flame.

There may be an alternative solution to the problem:

Install a protective cap at the end of the chimney (popularly called a deflector, popularly called a “mushroom”).
Increase the chimney pipe itself by 1–2 m if, due to the height and location of nearby buildings, there is a disturbance in the circulation of air masses.

Cornice-type caps are currently prohibited according to SNiP II-35 and SNiP 02.04.05. However, in some cases, their installation may be the only way out - so it is still better to consult with gas workers.

Burner nozzle or filter clogged

If the pilot light does not light when the boiler is turned on, this is a sure sign that the starting elements are clogged. Namely, you will have to clean the igniter nozzle nozzles, the fine-mesh inlet filter or the pilot burner filter. You can do this yourself using handy tools.

For example, filters are easy to blow (even just blowing is enough, but if you have a hand-held vacuum cleaner or a pneumatic spray, it will, of course, be more convenient). You will have to tinker with the nozzles - scrape away carbon deposits with a thin copper wire until the original diameter of the nozzles “returns”.

The pressure in the gas line has decreased

Turning off the burner is the very first sign of a drop in pressure in the gas supply line, while the pilot flame does not go out when the boiler stops operating.

First of all, evaluate how gas flows through the pipeline. To do this, unwind the hose of the pipes and open the valve completely, and then see:

if there is a strong hiss and the smell of methane is released, everything is fine with the supply;
if the signs are almost invisible or absent, the problem is in the gas supply system.

Typical problems with turbo boilers

The problems described above also occur with turbocharged boilers. But in addition, given that boilers with a closed combustion chamber are equipped with additional elements, additional “troubles” can happen to them.

For example, during their operation you may encounter the following difficulties:

icing of the coaxial chimney outside the house;
failure of the built-in air blower.

Their design, of course, is more complex than that of models with an open combustion chamber. But at the same time, you can carry out all the same manipulations with them as with atmospheric boilers.

But let us dwell in more detail on the breakdowns characteristic of this type of equipment.

Icing of the hood or chimney

If you observe that the boiler goes out most often in frosty conditions, then most likely the chimney opening is blocked by an ice mass.

This may happen due to:

formation and accumulation of condensate;
snow accumulation.

As you can see, the reason is bad weather conditions. Therefore, the solution to the problem is to protect the chimney from external factors.

In this case, again, it is worth considering the option of installing a “fungus”, i.e. deflector. But this is a preventative measure. But what to do if the problem has already “ripened”, and weather conditions further aggravate the situation? There is a way out in this situation too.

Condensate settling in pipes is typical for convection boilers with a coaxial chimney. Plugs form in them due to the difference in temperature of the air flows drawn into the burner from the street and coming out. These ice jams block the path both into and out of the combustion chamber.

To remove the ice crust from a coaxial chimney, you may even need to dismantle its outer part. Dismantling will not affect the daily operation of the system, but it is still better not to let it happen. Sometimes, in order to prevent the accumulation of condensate in the gap between the pipes, a pair of holes are drilled in the outer contour.

Simply breaking the ice is not the solution. Moreover, the chimney may be damaged. It is better to buy a portable gas burner with a can and “melt” the chimney with it. After the plug melts, the boiler will start working again. But to prevent such incidents from arising in the future, the pipes should be insulated.

The second prerequisite arises in cases of installation of eaves caps: they protect the chimney from precipitation, but in winter they cause more trouble than they are worth, impeding the outflow of flue gases.

Fan or turbine malfunction

When the wick of a gas boiler with a built-in supercharger suddenly goes out during operation or does not initially light up, listen to the sounds it makes.

During normal operation, the turbocharging system should hum steadily, so you should be wary of the appearance of extraneous noise.

If there are none during operation, the breakdown is obvious: that is, the automation does not allow the safety valve to open, so the wick does not light up.

In this case, we strongly recommend not to engage in amateur activities, but to immediately call the gas workers. In most cases, turbocharging cannot be repaired - most likely it will have to be replaced, and such work is associated with the risk of carbon monoxide spreading throughout the room.

Therefore, it is better if this process is monitored by a gas engineer from a company with which an agreement has been concluded for equipment maintenance and gas supply.

Typical problems of double-circuit boilers

Double-circuit modifications of gas boilers, intended for the preparation of coolant and hot water, can also fade for all the reasons described above. But if there are no signs of the above breakdowns, perhaps the problem is caused by the specific features of the unit.

These include those that arise due to the operation of the water overheating protection system, namely:

mixing hot and cold running water;
thinning of the walls of the gearbox membrane.

The instructions for boilers with an additional heat exchanger for domestic hot water usually warn that two taps cannot be opened at the same time. It is better to initially select the most suitable temperature for heating hot sanitary water in the settings.

The fact is that when cold water is turned on, the consumption of hot water decreases, and heat is generated in the same mode, overheating the heat exchanger. Due to overheating, the automatic system is activated, which shuts off the gas supply and blocks the operation of the boiler.

If operation is carried out according to the instructions, but the dual-circuit unit still turns off, you need to change the gasket of the water unit. Most likely it is worn out.

Advantages

The assembly is carried out in accordance with European technologies.
Good technical characteristics - the manufacturer achieves a high level of efficiency and cost-effectiveness due to innovative technologies involved in production.
Works stably and without noise.
Can be used in a heating system without forced circulation - it operates energy-independently.
Simple installation - you can handle it yourself, without the help of specialists.
The kit includes instructions explaining how to light the device, how to connect it to the heating system, how to carry out repairs and maintenance, as well as other useful information.
Equipped with reliable automation that ensures the safety of the equipment.
The coil is made of copper. The water heats up quickly.
The heat exchanger is made of steel. Characterized by high heat transfer.
Three years warranty. Cast iron ones last an average of 25 years, steel ones – 15 years.