The situation when Biryusa refrigerator stops turning off is one of the most alarming signals for the owner of household appliances. Instead of the usual rhythmic hum and periodic pauses, the unit begins to emit a monotonous, continuous sound of the engine running. This not only creates discomfort due to increased noise, but also indicates that the cooling system is operating in emergency mode, trying to achieve the specified temperature parameters.
Continuous operation compressor leads to its overheating and accelerated wear of the mechanical parts. If you ignore this symptom, the service life of the motor may be reduced several times, which will inevitably lead to an expensive replacement of the unit. It is important for owners of models of the 133, 134 series or more modern two-chamber versions to understand that the reasons may be hidden either in a banal loss of tightness or in the failure of the control electronics.
In this article we will analyze in detail the main malfunctions that lead to a continuous cooling cycle. You will learn how to independently carry out initial diagnostics and determine whether you need to call a specialist or whether the problem can be fixed on your own. Understanding the principles of operation thermostat and refrigerant will help you save time and money on repairs.
Faults of the thermostat and temperature sensors
The most common reason why a refrigerator Biryusa turns off, there is a failure of the thermostat (thermostat). This component is responsible for monitoring the temperature inside the chambers and sends a signal to turn the compressor on or off. If the contacts inside the thermostat stick in the closed position, the engine receives continuous current and operates without interruption, even if deep freezing has already been achieved in the chamber.
In models with a system No Frost or electronic control, the role of a mechanical thermostat is performed by air temperature sensors. Their readings may be distorted due to oxidation of the contacts or a software failure of the controller. In this case, the “brain” of the refrigerator simply “does not see” that the desired temperature has already been reached, and continues to keep the compressor on.
To diagnose a mechanical thermostat, it is often necessary to remove it and check it with a multimeter under conditions of temperature changes. Electronic sensors are checked for resistance, which should change depending on the heating or cooling of the sensitive element.
How to check a thermostat without instruments?
There is a popular test method: if when the temperature drops (for example, putting the thermostat in the freezer for 15-20 minutes) there is no click, but the contacts ring, then the part is faulty and requires replacement. However, this method does not provide a 100% guarantee.
It is worth noting that replacing the thermostat is a procedure that requires care, especially if the capillary tube is fixed in a hard-to-reach place. Incorrect installation of a new part can lead to the fact that the refrigerator either stops turning on or continues to work without stopping.
Refrigerant leak and circuit failure
The second most popular reason for continuous operation is freon leak. The refrigerant circulates in a closed circuit, taking heat from the refrigerator chambers. If a microcrack appears in the system (often in the foamed part of the housing or in the soldering areas of the capacitor), the gas gradually evaporates. The pressure in the system drops, and the compressor is forced to work around the clock, trying to compensate for the lack of cooling capacity.
The main sign of a leak is that with continuous operation of the motor, the temperature in the chambers either does not drop at all, or drops very slowly and insufficiently. The back wall of the freezer may only be partially covered with a “cap” of snow or remain warm. In such cases attempts to turn the temperature regulator to maximum only aggravate the situation, causing the compressor to burn out..
The process of restoring tightness includes several stages: searching for a leak using a leak detector or soap solution, vacuuming the system to remove moisture and air, and then filling with a new portion of refrigerant strictly by weight. It is impossible to carry out these operations independently without specialized equipment (vacuum pump, pressure gauge station).
It is important to understand that the freon used in modern models Biryusais often a mixture of different gases. Using the wrong type of refrigerant or violating the proportions when filling can lead to unstable operation of the system and repeated breakdowns.
Problems with sealing rubber and heat loss
Often owners forget about the simplest reason - a violation of tightness doorway. If sealing rubber (the cuff) is worn out, cracked or simply dirty, warm air from the room constantly enters the chamber. The compressor tries to cool this incoming volume and does not turn off, since the temperature sensor records a constant increase in degrees.
You can check the condition of the seal visually and tactilely. The rubber should be soft, elastic and fit snugly around the entire perimeter of the body. If you notice creases, peeling, or feel a puff of air while holding your hand near the closed door, the problem must be solved immediately.
In some cases, the rubber can be restored: washed with soapy water, lubricated with silicone, or even heated with a hairdryer to restore its elasticity. However, in case of severe deformation or ruptures, only complete replacement of the seal with an original part for your model will help.
☑️ Diagnosis of the seal
It is also worth checking the door hinges. If they are loose or warped, the door may not close tightly even with good rubber. Adjusting the hinges often restores tightness without the need to purchase new spare parts.
Incorrect operating and placement conditions
Sometimes the reason lies not in a breakdown, but in the incorrect use of the device. If Biryusa refrigerator is installed too close to a wall, radiators or in direct sunlight, the efficiency of heat removal from the condenser drops sharply. The compressor overheats and runs longer than usual, trying to cope with the thermal load.
Another factor is the placement of warm products inside the chambers. If you put a large pot of soup or a freshly cooked roast in the refrigerator, the unit will work in enhanced mode until the entire volume has cooled down. This is a normal reaction, but it should not last for days.
The frequency of opening doors also affects. In households with small children or during hot seasons, the door may be opened too often, which upsets the temperature balance. In such cases, the equipment simply does not have time to enter the mode and turn off.
| Influence factor | Impact on work | Recommended action |
|---|---|---|
| Distance to the wall | Less than 5 cm worsens ventilation | Move 10-15 cm |
| Temperature in the room | Above +30°C increases the load | Ventilate the room or turn on the air conditioner |
| Loading chambers | Full chambers keep the cold better | Do not fill more than 80% of the volume |
| Condenser condition | Dust reduces heat transfer | Clean the grille regularly rear |
Faults in the start relay and compressor
The most serious scenario is wear itself compressor or its starting relay. The relay is responsible for starting the engine and protecting against overloads. If its contacts burn out or the mechanism jams, the compressor may hum, but not start, or, conversely, work continuously without receiving a signal to stop.
Wear of the compressor piston group leads to a drop in performance. The motor hums and vibrates, but does not create enough pressure to circulate freon. As a result, the refrigerator runs continuously, but does not freeze. This condition is often called “the compressor does not pump.”
Diagnostics of these components requires professional skills. Checking the motor windings, measuring resistance and analyzing current consumption allows you to accurately determine whether the motor can be repaired or needs to be replaced. Often replacing the compressor is not economically feasible for older models.
⚠️ Attention: If you hear a loud knocking, clanging or smell a burning smell from the compressor, immediately unplug the refrigerator. Further operation may lead to a fire or complete failure of the system.
Failures in the electronic control module
Modern models Biryusa equipped with electronic control boards. Power surges, moisture, or manufacturing defects can lead to electronic glitches. The board may send incorrect commands to the actuators, forcing the compressor to work in constant mode.
Sometimes the problem is solved by rebooting the system. To do this, you need to completely turn off the power to the refrigerator by unplugging the cord from the outlet for 15-20 minutes. If, after switching on, the operating mode returns to normal, then a single software failure has occurred.
If the problem recurs, diagnostics of the module is required. In some cases, flashing helps, but most often it is necessary to replace the board or its individual elements (capacitors, relays). Repairing electronics on your own without a circuit diagram and experience is extremely difficult.
Is it possible to use a voltage stabilizer?
Yes, installing a high-quality voltage stabilizer will protect the electronic module of the refrigerator from power surges and extend its service life, especially in old houses.
Frequently asked questions and answers (FAQ)
How long should the Biryusa refrigerator work and how long should it rest?
In normal operation, the working time ratio is approximately 40-50%. This means that for 10-15 minutes of work there should be 10-15 minutes of rest. However, these figures depend on the room temperature, the loading of the chambers and the installed cooling power.
Why does the refrigerator not turn off for a long time after defrosting?
Immediately after defrosting and loading food, the temperature inside the chambers is high. The compressor takes time (from 2 to 6 hours) to cool the entire volume to the specified values. If after this time it does not turn off, it is worth checking the settings and tightness.
Is it possible to replace the thermostat in the Biryusa refrigerator yourself?
Replacing a mechanical thermostat is possible with your own hands if you have basic skills and tools. However, it is necessary to accurately select the model that matches your unit and correctly install the sensitive capillary tube so that it is in close contact with the evaporator.
Is it dangerous to continue using a refrigerator that does not turn off?
Short-term operation in this mode is not dangerous. But if the refrigerator hums for days, this leads to overheating of the compressor, melting of the wiring and increased energy consumption. It is not recommended to leave equipment in this condition for a long period of time.