Common breakdowns of solid fuel boilers

No matter how expensive and efficient the equipment is, it can eventually break down. To understand that the heating equipment has failed, it is necessary to know the main malfunctions of solid fuel boilers and the reasons that caused them.

Solid fuel boiler overheats

Why does the boiler temperature rise to too high a level? This can happen for a variety of reasons. For example, due to a broken circulation pump or if the equipment is selected incorrectly, so the heat generated by the boiler is much more than needed to heat the room.

The solid fuel boiler will heat up until the safety valve is activated due to boiling water inside the system. In most cases, the boiler overheats due to an emergency power outage. To prevent this, it is recommended to install an uninterruptible power supply and a storage tank (heat accumulator).

Condensation from the boiler or chimney

The reason may be insufficient temperature of the heating medium in the return pipe if the solid fuel boiler does not reach the temperature. If this malfunction is not eliminated, soot begins to accumulate in the chimney. The service life of the equipment is also reduced.

To prevent this from happening, it is important to ensure that the water temperature in the return pipe is at least 55 degrees. For this purpose, a three-way mixing valve is installed.

Resin formation on the boiler walls

Resin contamination of the heat exchanger can be the cause:

• use of low-quality fuel;
• insufficient combustion temperature;
• incomplete combustion of fuel;
• Lack of draft or airflow.

The most common causes of resin buildup on boiler walls are improper installation and improperly selected fuel.

Fuel burns poorly in the boiler

If the solid fuel boiler does not burn well and the fuel in it does not completely burn, check the draft in the chimney and, if necessary, clean the equipment. The reason why the solid fuel boiler does not burn may be the lack of draft. Therefore, if cleaning the pipe did not help, you need to increase the height or cross-section of the chimney pipe.

The pressure rises strongly

The pressure in the system may rise because the expansion tank used is insufficiently large or damaged.

Black smoke is coming from the boiler

The reason for the black smoke coming out of the chimney may be the use of low-quality fuel or insufficient air to ensure high-quality combustion.

Fuel consumption is too high

Excessive fuel consumption may be due to its poor quality. For example, it has minimal calories or high humidity. Other reasons for high consumption include:

• significant heat loss of the premises;
• incorrect choice of boiler capacity;
• mistakes in the design of the heating system.

As a result, the cost of heating the premises increases significantly. To prevent this, you need to choose only high-quality fuel, insulate the building, and check the system for design errors.