The situation when a refrigerator Biryusa works without interruption is familiar to many owners of this equipment. The unit hums around the clock, trying to reach the set temperature, but never turns off. This not only increases energy bills, but also creates the risk of complete breakdown of expensive equipment in the shortest possible time.
The constant operation of the motor-compressor indicates that the cooling system cannot reach the desired temperature or the sensors do not record this moment. Depending on the model, be it classic Biryusa 3 or more modern Biryusa 6 with the No Frost system, the reasons can vary from a banal violation of operating rules to serious technical malfunctions.
Before Call a technician or disassemble the unit; it is necessary to carry out initial diagnostics. Often the problem lies in small things that you can fix yourself in a few minutes, without resorting to complex repairs. However, this symptom cannot be ignored, since continuous load quickly damages the compressor.
Violation of temperature and tightness
The first thing to check is the operating conditions. If warm air from outside enters the chamber, the refrigerator simply does not have time to cool it, and the motor works non-stop. This is the most common reason that users encounter.
Pay attention to the tight fit rubber seal to the body. Over time, the rubber dries out, cracks or deforms, forming gaps. Warm air enters through them, causing the unit to work for wear. Check the cleanliness of the seal: adhered fat or crumbs may impair the seal.
⚠️ Attention! If the seal is damaged or has lost elasticity, replacing it is the only correct solution. Attempts to lubricate it with oil or heat it with a hairdryer give only a temporary effect.
Also check whether the refrigerator is not loaded too tightly with food. For proper circulation of cold air, there must be a gap between the food and the walls. If you just put a hot pan inside, the compressor will run until the food has completely cooled.
- 🌡️ Check that the thermostat knob is not set to the maximum value (7 or Max).
- 🚪 Make sure the door closes tightly and does not open on its own.
- 🧊 Do not place hot foods inside the chamber, let them cool to room temperature.
Malfunctions of the thermostat and sensors
If everything is in order with the tightness, the problem may be hidden in the “brain” of the system - the thermostat. It is this element that is responsible for sending a signal to the compressor to turn on and off. Older models Biryusa use a mechanical thermostat, while new ones use an electronic sensor.
If a mechanical thermostat breaks down, the contacts may “stick” in the “on” position. In this case, the compressor receives voltage constantly, regardless of the actual temperature inside the chamber. This can be determined if you carefully disconnect the wires from the thermostat: if the motor stops, then the problem is in the regulator.
In models with electronic control, temperature is controlled temperature sensors (NTC thermistors). If one of them fails and shows incorrect data (for example, that the chamber is +10°C, although it is actually +2°C), the control unit will keep the compressor on.
Replacing the thermostat is a simple procedure, but requires accuracy. It is important to choose an analogue with exactly the same characteristics, otherwise the refrigerator will either turn on frequently or work intermittently.
- 🔧 To replace the mechanical thermostat, you will need to remove the plastic cover and unscrew the fastening screws.
- ⚡ Before any electrical work, be sure to unplug the refrigerator.
- 📉 The new sensor should have identical resistance at a certain temperature.
How to check a thermostat with a multimeter?
To check a mechanical thermostat, remove it and immerse the sensitive tube in cold water with ice. Test the contacts with a multimeter: if the circuit does not open when cooling, the device is faulty.
Refrigerant leakage and problems with the cooling system
One of the most serious reasons for continuous operation is freon leak. The refrigerant circulates through the system, picking up heat. If its quantity decreases due to a microcrack in the circuit or evaporator, the cooling efficiency decreases.
The compressor tries to compensate for the lack of freon by working without stopping. Visually, this can be noticed by poor cooling (food spoils) or by the fact that the condenser grille at the back heats up unevenly. In some cases, frost or ice may appear on the tubes.
⚠️ Attention! Refilling your refrigerator with freon yourself without finding and fixing the leak is a waste of money. Gas will escape through the crack again.
To fix this problem, you need to call a specialist with equipment to evacuate the system and find the leak. The technician will seal the damage, replace the filter drier and fill the unit with the required amount of refrigerant.
Wear of the compressor and start relay
The most expensive and difficult reason to repair is wear of the compressor itself motor-compressor. Over time, the piston group wears out, the compressor loses performance and cannot create the necessary pressure in the system. It hums, but does not pump freon with the required force.
The starting relay also often fails. This small element is responsible for starting the engine. If the relay contacts are burnt or stuck, the compressor may hum but not start, or run continuously without receiving a signal to stop.
Diagnostics of the compressor at home is limited. If the engine gets very hot, makes strange knocking noises, or hums, but does not start, it most likely needs to be replaced. This is a complex process that requires resoldering the tubes and evacuating the system.
☑️ Compressor diagnostics
Comparison table of faults
To quickly navigate the problem, use the table below. It will help compare symptoms with possible causes.
| Symptom | Probable cause | Difficulty of repair |
|---|---|---|
| The refrigerator hums, but does not cool | Leakage freon or compressor failure | High (requires a technician) |
| The motor does not turn off, there is cold | Thermostat or sensor is faulty | Medium (you can do it yourself) |
| Ice on the back wall, non-stop operation | Problems with defrost or seal | Low/Medium |
| Extreme heating of the compressor housing | Motor wear or contamination capacitor | Medium/High |
Problems of the defrost system (for No Frost models)
If you have a modern Biryusa with system No Frost, the reason may lie in the defrost system evaporator. In such models, ice is not visible inside the chambers; it accumulates on a hidden evaporator behind a plastic panel.
If the defrost heating element burns out, the timer or defrost sensor burns out, the ice stops melting and blocks air circulation. The fan moves air, but it does not pass through the evaporator clogged with ice. The compressor runs constantly, trying to cool the chamber, but to no avail.
You can diagnose this by defrosting the refrigerator manually within 24 hours. If, after turning it on, it works normally for a few days, and then stops cooling again, the problem is definitely in the defrost system. It is necessary to check the heating element circuit and replace burnt out elements.
- ❄️ Complete defrosting should last at least a day so that the ice inside the case completely melts.
- 🔌 Do not use a hair dryer to speed up defrosting, this may damage the plastic.
- 🔍 Check the drainage hole: if it is clogged, the water does not leave and freezes.
External factors and installation conditions
You should not discount the conditions in which the equipment is installed. If the refrigerator Biryusa is installed close to the wall or in a niche without gaps, heat is not removed from the condenser grille. The motor overheats and works more intensely.
The room temperature also affects. If the refrigerator is in the kitchen, where it is very hot in summer, or near the stove, it is more difficult for it to give off heat. In such conditions, working without a break can be a temporary defensive reaction.
⚠️ Attention! Installing the refrigerator near heating appliances or in direct sunlight will reduce the life of the compressor by half.
Check the rear grille for cleanliness. A layer of dust and pet hair acts as a thermal insulator, preventing cooling. Regular cleaning of the back of the unit with a vacuum cleaner is a mandatory maintenance procedure.
Frequently asked questions (FAQ)
Can the Biryusa refrigerator work without stopping due to power surges?
Yes, power surges can damage the electronics or the start relay, resulting in incorrect operation. It is recommended to use a voltage stabilizer.
How long should the compressor normally work?
In normal mode, the compressor operates cyclically: it works for about 10-15 minutes and rests for 20-30 minutes. The operating time depends on the load and temperature in the room.
Is it dangerous to leave the refrigerator running without interruption?
Yes, it is dangerous. The compressor may burn out from overheating, and there is also a risk of wiring or plastic elements catching fire due to high temperature.
Why did the refrigerator start working without stopping after defrosting?
You may have damaged the pipe system during defrosting (pierced the evaporator) or did not allow it to dry completely before turning it on, which caused a short circuit in sensors.