Gas boilers are considered one of the most economical and easy to install, which are used for autonomous water heating and heating. Despite this, they are still engineering equipment. And sometimes there are situations when the gas boiler simply does not work. The reasons may be very different. The signs of a malfunction will help you find out exactly. It is important to understand the types of heating installations, as well as the principles of their operation.

Types of gas boilers

Before you start troubleshooting, you need to perfectly understand which boiler is installed. They are divided into several groups.

By installation type

The placement of the gas boiler can be floor and wall. The first option has high power, which allows it to be used for heating large rooms. It is characterized by a long service life, since the main components are made of cast iron and steel. For such technologies, a separate room is usually allocated.

Wall-mounted units are smaller and lighter. They are limited in power. In addition, they are demanding on the quality of the water that needs to be heated.

By type of construction

Devices are divided into single-circuit and double-circuit. The first are intended exclusively for heating. The second circuit additionally heats running water.

By type of disposal of processed products

Boilers have natural and forced draft. First option connects to an ordinary chimney. Exhaust gases are removed naturally. For everything to work as it should, this design has some installation rules. So, for example, the pipe should be at least half a meter higher than the roof. Otherwise, the boiler may go out.

Such units have open combustion chambers or atmospheric burners. In this case, the air to maintain the fire is taken from inside the room.

The second version of the gas boiler has the so-called coaxial chimney, which in fact is a pipe located inside another one. A similar design is displayed immediately through the nearest wall to the street. Oxygen enters through the outer tube, which supports the flame. And on the inside, the products of combustion are brought out. Such boilers have closed combustion chambers.

By way of water circulation

It may or may not be dependent on electricity. The first uses a special current-powered pump, which creates forced pressure in the system. In most cases, such installations have a complex automation system that supports the desired mode of operation.

Non-volatile do not need to be connected to a 220V network. The movement of water is carried out by means of a natural difference. A piezo allows you to kindle a fire, which is triggered by pressing a button.

Gas boiler malfunctions

All malfunctions of thermal units can be conditionally divided into four main groups:

  • the equipment does not start;
  • the burner goes out;
  • does not reach the desired temperature;
  • does not turn off.

Equipment does not start

A gas boiler malfunction may be due to:

  • ignition system problems;
  • lack of voltage in the network;
  • shutting off the gas supply;
  • insufficient or vice versa excessive fuel pressure;
  • burner blockage.

Any gas equipment, including the boiler, is a complex mechanism. It has a potential hazard if misused. That’s why Doing your own repairs is not recommended.except in the simplest cases.

To replace the ignition elements or clean the nozzles, it is imperative to call a specialist who has special approvals from the relevant authorities. The fact is that damage to the burner can lead to the separation of the flame from it, which in most boilers is a sign for automatic shutdown.

Main article: What to do if a gas boiler blows out?

Burner damping

There are several reasons that lead to the fading of this element:

  • excessive or insufficient traction;
  • the corresponding sensor does not work;
  • insufficient thermocouple contact;
  • unstable operation of the power system;
  • depressurization of the gas system.

Problems with the draft of a gas boiler arise with installations with an open combustion chamber and a natural emission system. All of them have built-in sensors that can be triggered by poor extraction of decay products. As a result, the automation shuts off the burner. In the case of excessive draft, the exhaust gases are drawn out faster, which can lead to a breakdown of the fire. As a result, the system shuts off the fuel supply. Sometimes the flame can go out due to strong gusts of wind.

Checking the lack of thrust with an open chamber is simple — you need to bring a burning match to the holes of the atmospheric burner. If all is well, the flame will be directed inward. In the event of excessive thrust, the gas begins to burn quickly, an unusual noise occurs, and the flame is barely noticeable. If you bring a burning match, the fire will instantly go out.

In most cases, draft problems result from non-compliance with the regulations for the installation and use of chimneys. Sometimes the cause is condensation inside the pipe. In the case of minus weather outside, the drops may freeze, which eventually leads to a decrease in the clearance.

Almost all problems associated with traction are solved independently. First you need to determine the cause of the malfunction. So, for example, you can lengthen or, on the contrary, cut the chimney, remove frost or other blockages.

You can determine the malfunction of the sensor by closing its terminals and trying to ignite the equipment. If everything worked, the sensor has broken, and therefore it is advisable to replace it as soon as possible.

To prevent problems with power surges, the unit is connected to the network using a stabilizer. In addition, just in case, you can create power from a gas generator or battery.

Doesn’t get hot

Sometimes there are situations when the boiler works, but the water does not heat up to the desired temperature. There are several reasons:

  1. Poor oxygen supply. So, for example, in special rooms for heaters, special holes are made in the doors to allow air to get inside.
  2. Chimney problems.
  3. Pump breakdown or failure of individual automation elements.
  4. Pressure drop in the system.
  5. Air congestion.
  6. In the case of a double-circuit boiler, an excessive amount of energy can be taken from the water supply.

It is advisable to call a specialist to correct the problems of this group, who will diagnose and fix everything.

Equipment does not turn off automatically

Basically, automatic units turn off when the temperature inside reaches the desired level. It is determined by the appropriate sensor. Shutdown is carried out by means of a processor installed in the electronic board. Usually, when the boiler does not want to turn off, the thermostat or microcircuit has failed.

Connecting a gas boiler at home is an excellent precaution that allows you to use hot water and not be dependent on the heating season. Like any other technological equipment, it can also fail. There are several main problems, the solution of which will further allow you to use the installation.


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