A sudden stop in the refrigeration chamber or lack of cold in the freezer is always stressful for the owners, because food supplies are at risk. Domestic refrigerators Biryusa have earned a reputation as reliable “workhorses”, but even they eventually experience malfunctions in the cooling system. If you notice that the unit is humming, but not cooling, or the motor is completely silent, the first thing you should do is not panic and look for the number of the service center.
Often the reason lies in trivial things that you can fix yourself in a matter of minutes, without resorting to a complex tool. However, there are also serious technical problems, such as refrigerant leak or compressor failure, that require professional intervention. In this article, we will analyze in detail all possible scenarios, from simple settings to complex breakdowns, so that you can accurately diagnose the problem.
Understanding the operating principle of your unit will help not only fix the current problem, but also prevent future breakdowns. We will look at diagnostic features for different models, including systems No Frost and drip type, and will also pay attention to specific symptoms indicating a specific unit.
Primary diagnostics and simple causes
Before looking for complex engineering breakdowns, it is necessary to eliminate basic operating errors. Very often, users are faced with a situation where the refrigerator is working normally, but the food spoils due to incorrect temperature settings. Check whether the power regulator has been accidentally knocked down or whether the “Vacation” mode is turned on, which turns off the main camera.
Pay attention to the tightness of the door. If the rubber seal is dirty, deformed or simply does not completely close the opening, cold air will evaporate, and warm air will flow inside. As a result, the compressor will work without interruption, trying to compensate for heat loss, but will not reach the desired temperature.
It is also worth checking the ventilation. If the unit is built into a niche or stands close to the wall, heat exchange may be disrupted. The rear grille must have free access to air, otherwise condenser it will not be able to effectively transfer heat to the environment.
Problems with the thermostat and sensors
One of the most common reasons why Biryusa refrigerator does not freeze is a malfunction of the thermostat. This element is responsible for turning the compressor on and off depending on the temperature inside the chambers. If the thermostat is “stuck” in the “Off” position or simply fails, the motor-compressor simply will not receive a signal to start.
In models with electronic control, temperature sensors (thermistors) are responsible for this process. Their resistance changes with temperature changes, and if the sensor shows incorrect values, the control unit may mistakenly assume that there is already cold in the chamber. Diagnosis of such elements requires a multimeter and resistance testing at different temperatures.
⚠️ Attention: Before any diagnostics of electrical components, including the thermostat and sensors, be sure to unplug the refrigerator! Working with live electrical wiring is deadly.
Symptoms of a malfunctioning thermostat are often accompanied by the absence of a click when turning the knob or, conversely, a constant clicking sound. In older models, you can temporarily revive the thermostat by knocking on it, but this is only a short-term measure. Replacing the unit is the only correct solution to restore normal operation.
How to check a mechanical thermostat?
To check a mechanical thermostat, you can close its contacts directly. If the compressor starts after the short circuit, then the problem is with the thermostat. However, remember that in this case the refrigerator will work continuously until you open the circuit, so you cannot keep it in this mode for a long time.
Malfunctions of the defrost system (for No Frost models)
If your Biryusa is equipped with a system No Frostand you notice ice freezing on the back wall inside the chamber or under the plastic panel, the problem lies in the defrost system. Ice blocks the air circulation channels, and cold stops flowing into the refrigerator compartment, although it can be very cold in the freezer.
A timer (or electronic module) Defrost heating element and a defrost sensor are responsible for the defrosting process. If one of these elements fails, the evaporator becomes overgrown with a “fur coat”. This can be seen visually if you remove the back panel in the freezer. Often it is the heating element or fuse that burns out.
☑️ Diagnostics of the No Frost system
It is important to understand that simply defrosting the refrigerator for 24 hours can temporarily solve the problem, but after a week or two the ice plug will form again. It is necessary to find and replace the burnt element of the defrost circuit. In some models Biryusa the fan that circulates the air may also fail; if its blades are frozen in ice, it will not be able to rotate.
Freon leak and problems with the compressor
The most unpleasant situation for the owner is a refrigerant leak or a breakdown of the compressor motor. If the refrigerator hums, runs constantly, but does not cool, and the condenser grill at the back remains cold (or only partially warms up), most likely a problem has occurred freon leakage. Freon can escape through microcracks in the foamed part of the body or through the soldering of tubes.
The compressor is the heart of the unit. If it hums but does not start, or starts for a couple of seconds and clicks (the starting relay is activated), this may indicate an interturn short circuit in the windings or a jammed mechanism. In some cases, replacing the start relay helps, but if the problem is inside the motor, an expensive replacement of the entire assembly will be required.
| Symptom | Probable cause | Necessary actions |
|---|---|---|
| The grill is humming, but not getting cold cold | Freon leak | Call a technician, search for leaks, refill |
| Clicks and does not start | Faulty start relay or compressor | Replacement relay or motor diagnostics |
| The side of the housing heats up, but there is no cold | Clogged capillary tube | Cleaning the system, replacing the filter-drier |
| Strongly buzzing and vibrating | Compressor wear or incorrect installation | Checking the legs, replacing the motor |
Restoring tightness and refilling with refrigerant are jobs that cannot be done efficiently at home without special equipment (vacuum pump, pressure gauge station). Attempts to refill yourself “by eye” will lead to rapid breakdown of the compressor.
Clogged capillary system
Another technical reason for the lack of cold may be clogged capillary tube. Oil oxidation products or moisture can accumulate inside the thin tube through which freon circulates, turning into an ice plug. This interferes with the circulation of the refrigerant.
Symptoms of a blockage are often similar to a lack of freon: the compressor is overloaded, the condenser may only be hot at the beginning, but the evaporator remains warm. Sometimes you can hear gurgling or intermittent hissing when the unit is operating, which indicates difficulties in the passage of gas.
⚠️ Warning: Purging the capillary system with nitrogen at high pressure is a dangerous procedure. Incorrect pressure can rupture the tubes or damage the evaporator. Entrust this to the specialists.
To remove the blockage, technicians often use the method of pushing with nitrogen or replacing the filter-drier. In difficult cases, depressurization of the circuit is required, which is almost impossible to do in an apartment. If your Biryusa old, the blockage may be caused by the destruction of the internal insulation of the compressor windings.
Electronic control modules
Modern models of refrigerators Biryusa are equipped electronic control units. If the control board burns out or there is a problem in its circuit, the refrigerator may behave inappropriately: it may not turn on, change modes chaotically, or show errors on the display. Power surges in the network are a common cause of failure of electronics.
Visually on the board you can see burnt tracks, swollen capacitors or traces of burning. However, often the breakdown is hidden. In this case, professional diagnostics using an oscilloscope or replacing the module with a working one is required.
It is worth noting that before replacing an expensive module, you must make sure that all sensors and actuators are in good working order. Electronics “glitches” can be caused by oxidation of contacts in connectors or moisture getting on the board.
Is it possible to restore the board yourself?
If you have soldering skills and reading electrical circuits, you can try replacing burnt out elements (relays, fuses). However, without an accurate diagnosis of the cause of the failure, the new board may also burn out when turned on.
When you need to call a technician
Independent repair is good when it comes to cleaning, replacing the seal or thermostat. However, there are situations when calling a specialist from the service center is the only correct solution. This applies to work related to a sealed circuit, welding copper pipes and refrigerant charging.
A master is also needed if the compressor needs to be replaced. This process includes not only dismantling the old motor, but also evacuating the system, which requires a special pump. An attempt to start the system without vacuum will lead to instant failure of the new compressor.
If you live in a region with unstable voltage, it is recommended to install a voltage stabilizer after repair. This will protect expensive equipment Biryusa from repeated breakdowns and extend its service life for many years.
Why does the Biryusa refrigerator work without interruption?
Continuous operation most often indicates a freon leak, wear and tear compressor or chamber seal failure. The unit is trying to gain temperature, but due to a lack of refrigerant or heat flow, this is impossible.
Is it possible to use the Biryusa refrigerator if it does not freeze well?
It is not recommended to operate the equipment in this mode. The compressor is overloaded, which can cause it to burn out. In addition, bacteria can multiply in products if the temperature is above +5°C.
How often do you need to defrost the Biryusa refrigerator?
Models with manual defrosting require unplugging from the network every 3-6 months. The systems No Frost do not need defrosting, but general cleaning and washing are recommended once a year.
What to do if the refrigerator does not turn on after defrosting?
Wait 4-6 hours. The compressor's thermal protection may have tripped, or there may have been a lot of moisture left in the system. If after a day there is no work, the problem is in the start relay or wiring.