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What to do if the gas boiler shuts down

Preventive measures

Breakdowns of gas equipment occurs in all, it is impossible to be immune to it.

However, there are a number of ways to reduce the risks of breakdowns:

  • Routine diagnostics of gas equipment before the heating season. a specialist will conduct a revision, make a test run and talk about all the nuances of the boiler.
  • Selection of the correct mode of operation of the boiler and pump.
  • Periodic cleaning of all elements of the combustion chamber. carried out only by a master.

Incorrect capacity of the unit

If the gas boiler switches on and off frequently, it indicates that the capacity of the unit is too high for the room. As a result, the unit quickly reaches the desired temperature and shuts off. Frequent on and off leads to increased wear and tear on the parts of the boiler. Therefore, before buying a gas device, it is important to calculate the optimal value of its power based on the area of the heated room, its insulation and other factors.

For a large private house, floor standing gas boilers with a capacity of 35 kW are suitable. For apartments and small cottages is better to buy a compact hinged model that will fit perfectly into a small kitchen or hallway.

If the boiler is already installed, the problem of over capacity can be solved by the following methods:

  • installation of four-way valves;
  • Resetting the gas burner to the minimum setting;
  • Connection of a boiler or other systems so that part of the boiler power is spent on them.

Low pressure in the line

Usually the causes of low gas pressure are the following factors:

  • Fuel meter malfunction. There may be a suspicious sound or noise coming from the unit. On a defective device, the readings change jerkily or the pointer does not move at all. To fix the problem, contact a professional.
  • Safety sensors are triggered. if the system has noticed a fuel leak, the work of the unit is blocked. The smell of gas is also characteristic of leakage. If such a problem occurs you should turn off the gas boiler and call the gas service technician.
  • The filter is clogged. it should be cleaned.

Back draft

If there is back draft and the flame goes out, the protection system of the gas boiler is activated, and it turns off.

Correct the situation can only be done by eliminating the back draft. To do this, you need to identify the cause of its occurrence. For example, to correct the chimney construction, install a deflector, etc.д.

Reverse draught also occurs with poor ventilation in the room. It is easy to check this. the flame will burn well when you open the window. The following factors can make the ventilation worse:

In this case, measures must be taken to improve the ventilation.

Problems with the chimney

The common problem for gas boilers of open and closed type is an icing on the outlet of the chimney. Hot combustion products come out of the chimney and are converted into condensate, which freezes on the chimney cap. This frost prevents the flow of air, the fire goes out and the boiler shuts down. The ice must be cleaned and the air flow will resume.

If ice builds up regularly, the chimney must be insulated.

Classic chimney is more prone to all kinds of clogs. It can get in there:

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Voltage fluctuations in the network

If the voltage in the mains falls below the reading provided by the unit’s operating mode, the safety system will shut down the gas boiler. When the voltage returns to normal, the unit will start again.

To avoid this problem, an uninterruptible power supply should be installed.

Failures in the fan operation

In turbo gas boilers the air inflow and outflow of products of combustion is performed by the fan. If there is a malfunction in this node, the boiler will shut down.

In this case it is necessary to carry out diagnosis of the fan, clean it from clogging, replace damaged parts, inspect the wiring.

Problems with the pump

If the pump fails, the heat transfer fluid does not circulate properly through the system. As a result, the radiators are not heated, and the automation shuts down the gas boiler.

If the circulating pump has recently been included in the system, and then the unit began to turn off, there may have been mistakes during its installation.

Malfunctions in the burner

If the gas boiler keeps turning off, you should check the functioning of the burner:

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Why the heating boiler shuts down?

Even the most reliable equipment sometimes stops working, and heating boilers are no exception. Malfunctions occur both in new and in units of any type that have been in operation for a long time. There are many reasons why the heating boiler shuts down. To diagnose faults we recommend contacting a specialist. But while waiting for the wizard, you can figure out yourself why the automation blocks the heating equipment.

Why the boiler constantly shuts down

Such malfunctions occur both in new units that have just been installed and in units that have been in service for several years. The cause is caused by external and internal factors. Users often complain that the boiler shuts down and does not turn on after a long period of downtime. For example, in the cottage, you start the device only when you arrive, which can freeze the system.

  • Improper power settings.
  • Heating or hot water system (DHW).
  • Smoke Removal Unit.
  • Gas line.
  • The electrical part.
  • Incorrect regulation.

Malfunctions are subject to both wall hung and floor standing boilers. What to do to fix them? Find the cause and try to eliminate it.

Why does the gas boiler extinguish and how to fix the problem with your own hands?

It is very unpleasant when in the middle of winter in a private home begins some problems with heating equipment, such as a gas boiler. According to May’s law, the heat source begins to mope on the coldest days, when its disconnection leads to a rapid cooling of the coolant in the system, followed by the entire building.

The first thing that comes to mind is to call a handyman to solve your problem. The thought is correct, but due to a variety of reasons, the arrival of a specialist can be delayed for several hours or even days. Instead of slowly freezing up, try to figure out the reason why your gas boiler is fading and fix the problem with your own hands. We will tell you what to do in this situation.

Too much or not enough air

Each of these phenomena can cause blowing out. In order for the boiler to function properly, there must always be air flow into the furnace through the ventilation system. At the same time you can not allow drafts in the room, otherwise it will lead to blowing out the burner.

To see if there is enough oxygen in the room, you need to open a window and watch how the flames behave. This is why it happens:

  • If modern sealed windows are installed, the supply of fresh air may stop.
  • If the kitchen hood is too powerful, it may happen that a large part of the air flow is drawn by it.
  • The interior doors in the house have been renewed. The gaps between the floor and the sashes have decreased, hence the problems with oxygen intake.
  • A similar effect occurs when a bathroom or toilet hood is installed.

Fading problems associated with the boiler itself

Malfunctions of various kinds can also occur in the boiler itself and cause the appliance to turn off or go out.

Problems can be expressed by the following signs:

The gas burner does not start or burns very weakly. The origin of the problem may lie in clogged nozzles. If the nozzles do not work properly, the burner can start to smoke. You can clean the gas boiler yourself, using a thin wire or a soft brush.

The burner goes out after a short run. The source may be contamination of the ionization electrode, a gap in the gap or a torn connection wire, which causes the unit to howl and make a humming noise. These types of failures are quite solvable.

Flame breakage. If this fault occurs, the igniter gas pressure must be adjusted. The cause can also be excessive ventilation.

Unusual noises in the appliance and turning off without reason. It can indicate breakage of the internal fan or pump, or breakage of the thermostat.

An excellent choice to protect the gas boiler from voltage fluctuations in the house would be the purchase of an uninterruptible power supply. Read more: https://teplo.guru/kotly/gazovye/ibp-dlya-gazovyh-kotlov.html

Causes of clockwork

The frequency of switching on of the device that provides the heating of the heat carrier is denoted by the cadence. In the absence of external control devices connected to the equipment, most often the time interval between turning on the boiler does not exceed 10 minutes, and by default these figures are only three minutes. Frequent switching on and off is not the recommended mode for the operation of the gas boiler.

In order to maximize the economical consumption of natural gas, it is advisable to choose the option of continuous operation of the equipment with compensation for heat losses. Among the main problems provoking the clocking of the unit are:

  • overheating of the device in conditions of high power
  • insufficient pressure of the supplied gas;
  • faulty installation of the thermostat;
  • various failures of the pump;
  • filter clogging.

In small rooms, overconsumption of gas is common, so when selecting equipment, it is very important to correctly calculate its technical indicators and key performance characteristics. Among other things, the configuration parameters of different models often differ significantly, which implies a mandatory and very careful study of the manual before performing the configuration of the equipment.

Gas Boiler Keeps Shutting Down

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Let’s look at the main causes of constant switching on and off the boiler.

Causes of attenuation of turbine gas boilers with closed combustion chamber

Turbine models of gas boilers have additional equipment, so in addition to the above-mentioned problems with them there may be other difficulties:

Despite the fact that such devices are characterized by a complex design, all manipulations with checking the draught, pressure, contacts, etc. д. They are still relevant.

Ice on the hood or chimney pipes

If the gas boiler goes out mainly in frosty weather, it is possible that the chimney is blocked by a mass of ice. There are two reasons for this:

The first situation is typical for convection boilers, usually with a coaxial chimney. In them, the red-hot exhaust gases, when they cool down outside, create condensate that settles in the pipes. So when the thermostat turns the heating off after reaching the set temperature, all this moisture freezes. Over time, plugs form, blocking access to air.

As a rule, you can determine the problem visually: the surface of the spigot begins to get wet, and the wall at the level of ice is covered with frost on the outside.

Simply knock down the ice is not always possible, so it is worth buying a disposable construction burner with a canister in advance, so it can be used to defrost the duct. When it warms up, the boiler will be ready to work again, but to avoid this happening again, it is recommended to insulate the pipes.

The second situation arises when installing a coaxial chimney or caps cornice type: the desire to protect the chimney from precipitation is understandable, but to use them for gas equipment, as mentioned earlier. very undesirable. Instead of them it is recommended to put on the header open tapered nozzles.

Ice crust from the head to dislodge or remove, like ice, is impossible. it tightly covers the entire structure. Therefore, the external part of the chimney will have to dismantle and put in hot water until the complete defrosting. The boiler can function without this part, but it should be monitored all the time.

Faulty fan or turbine

When the igniter suddenly goes out in the unit with a built-in blower, you should listen to its work: turbocharger system or the fan should emit a measured hum, so if there are strange noises (creaking, crackling, whistling) or the sound comes with interruptions. you should think about their failure.

If they stop making any noise. the breakdown is obvious: the automatics do not allow the safety valve to open and the igniter does not light up at all.

Failed equipment can be tried to be repaired, but as practice shows, it is hardly repairable. In any case, the work should be carried out only by specialists, because without the necessary skills all manipulations with the blower associated with a high risk of carbon monoxide entering the room.



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