It is good when heating equipment uninterruptedly heats all winter. You do not have to interfere in the work, you just have to enjoy the warmth and comfort. But it happens that during the coldest period, heating stops. Why does the gas boiler turn off? The reason may be a malfunction of one of the nodes, which is why automation blocks its operation. You have two options: call a specialist or help yourself. Since the wait for the master may be delayed, use our recommendations.
Why does the heating boiler constantly turn off
Similar malfunctions occur both in new, newly installed units, and those that have served for several years. The reason is external and internal factors. Often users complain that the boiler turns off and does not turn on after a long period of inactivity. For example, in the country, you start the device only upon arrival, which is why the system can freeze.
The main causes of the problem lie in:
- Wrong selection of power.
- A heating system or hot water supply (DHW).
- Smoke removal unit.
- Gas line.
- Electrical parts.
- Incorrect adjustment.
Both wall and floor boilers are subject to malfunctions. What to do to eliminate them? Find the cause and try to eliminate it.
What to do if the boiler shuts down
Consider typical problems and solutions.
Inappropriate power
If the boiler often turns on and off, there is an excess of power. Yes, yes, excess is the same problem as disadvantage. A powerful device in a small room quickly warms up the area. Frequent shutdowns lead to wear of components, parts and rapid breakdown.
Before you buy equipment, consider these factors:
- climatic conditions;
- area;
- insulation quality;
- number of windows and doors;
- appointment of adjacent rooms.
For large areas and private houses, the Baxi, Navien, Lemax, Danko flooring equipment is suitable. Wall appliances fit into a small space of the apartment. These are the models "Bosch", "Ariston", "Wisman", Beretta, Vaillant.
But what if the boiler is already purchased and installed? Do not go to the store for new equipment. We need adequate solutions:
- Installation in a hydraulic system of four-way valves.
- Modulation of the burner flame to minimum mode.
- Inclusion in the boiler circuit. So the technique will work not only for heating, but also to provide you with hot water.
Low pressure in the gas line
The problem is caused by malfunctions of the general highway or frequent interruptions in the supply of fuel.
- Clogged or broken gas meter. You may hear noise or other sounds. A working meter should change the readings. If this does not happen, contact the wizard. It is forbidden to fix the problem yourself.
- Safety sensors have tripped. Modern equipment is equipped with gas control, temperature sensors. If a fuel leak is noticed in the system, the boiler operation is blocked by itself. Apply soapy water to the joints to locate the leak. If bubbles appear, turn off the gas supply and open the windows for ventilation. Call gas service immediately.
- Gas filter clogged. Clean.
Before the heating season, services check the condition of the mains. And also calculate the gas flow. If your home is constantly experiencing a power outage, notify the gas service.
Chimney problems
Problems with traction occur during operation of turbocharged and atmospheric boilers. In the first and second case, freezing of the outer part of the chimney is characteristic. Along with the removal of combustion products, hot steam also comes out. It settles in condensate, which freezes on the street. This blocks the flow of air, so the device turns on and immediately turns off.
Way out: remove ice and insulate the chimney. Then the drops will drain, not freeze.
To check for traction, light a match and bring it to the control window. If the flame deviates to the side - there is a draft, it burns exactly - no.
Facts about blockages of stationary chimneys:
- Mine may become clogged with construction waste. These are pieces of pipe that break off under the influence of condensate.
- Insulated sandwich pipes are susceptible to peeling of the zinc coating. It has the form of a film covering the passage.
- The mine is clogged with soot, soot, rubbish from the street, foliage.
- There have been cases when birds nested on the ends of the chimney.
For cleaning, it is better to contact the utilities. If the cause of the lack of traction is freezing, then the pipe will have to be insulated. In winter, this is difficult to do, so you can temporarily install a gas burner for heating.
Reverse thrust
Then the flame is blown by the wind, which makes the automatics cut down.
The situation is dangerous. In new boilers, control sensors are installed that turn off the work, and in old boilers carbon monoxide can enter the room.
How to fix the situation:
- Checking the installation of the chimney. With insufficient height there will be poor traction and wind blowing. A height increase of 50 cm above the ridge of the roof will help.
- It is recommended to mount fungi on the top of the pipe to avoid clogging. It is effective for solid fuel boilers. In the case of gas appliances, this is prohibited.
- Burning or damage to the pipe also leads to blowing. Repair or replacement will help.
- Lack of proper ventilation helps extinguish flame in atmospheric burners. Open the window so that air normally enters the dual-circuit unit.
Should the unit shut off when air flow is interrupted? Of course, this is what protective automation is designed for. Without ventilation, the burner will go out, which means that gas will flow into the room. What contributes to disruption of work:
- Sealed plastic windows.
- Solid doors, without clearance from below.
- Powerful hood that draws in a lot of air.
Compliance with the rules will help to avoid problems. A ventilation valve can be mounted in the window frame. And to compensate for the powerful hood, organize a natural influx from the street.
Automation Fails
Turbocharged cameras include a fan. He forcibly takes combustion products to the street through a coaxial chimney. If the fan breaks down, the device will stop functioning.
Therefore:
- Perform fan diagnostics.
- Clean its blades from clogging.
- Inspect the wiring, replace damaged items.
If the burner fades out periodically, check the draft sensor. If there is a malfunction, install a new sensor.
Network outages
Power outages and power surges are also recorded automatically. As a result, the heating stops, but as soon as the voltage is restored, everything starts again. Experts recommend installing UPS - uninterruptible power supplies. Why does the uninterruptible switch off? It can be discharged with a prolonged blackout.
If your region has frequent problems with electricity supply, choose independent gas boilers.
Incorrect pump installation
If earlier natural circulation of the heat carrier was provided, and now you decided to install the pump, then do it according to the rules. Incorrect installation leads to system failures. The equipment stops heating, the hot water turns off, the radiators cool down. If you have not previously performed the installation, it is better to contact a specialist.
Lack of room thermostat
When the design provides for an external thermometer, the operation of the equipment becomes convenient and economical. The unit starts when the temperature in the house decreases. If there is no thermostat, when the water is heated, the device gains temperature and turns off. But as soon as the coolant cools down, the device turns on again.
The fact is that the liquid cools faster than the air in the room, so the fuel is spent irrationally. Installing a thermostat will help to avoid such problems.
Malfunctions with equipment
Is heating equipment constantly shutting down? Check burner function:
- Ignition does not occur, or the flame immediately goes out. Clean the soot nozzles with a brush and blow off excess air from the system. Check the location of the ignition electrode, clean it during oxidation.
- After a short burning, the flame goes out. Need a diagnosis of the ionization electrode.
- The flame breaks off, while the nozzle is noisy. Adjust the gas supply. There may be high draft or airflow from the ventilation.
If there is no water when opening the mixer, clean the filters and make sure that the heat exchanger is working. With growths of scale, it can overheat. Then the pressure decreases, and the operation is blocked by the temperature sensor. Remove plaque from coil tubes.
The causes of failure are not only consumer-independent factors. First of all, your attitude to technology, care for it, proper installation affects. It is recommended once a year to inspect the units and components of the equipment.