The situation when your Biryusa refrigerator suddenly stops cooling always takes you by surprise. It may be warm in the chamber, food begins to spoil, and puddles appear on the shelves. These are classic signs of a malfunction of the cooling system that require immediate intervention.
However, there is no need to panic ahead of time. Sometimes the reason lies in a simple overload or incorrect installation, and not in a serious breakdown of the unit. In this article we will analyze in detail all possible causes, from simple operating errors to complex technical malfunctions.
Understanding the operating principles of single-compressor and two-compressor models will help you quickly determine the nature of the breakdown. We will look at symptoms that indicate a refrigerant leak, motor failure or problems with electronics.
Primary diagnostics: external factors and settings
Before sounding the alarm and calling a technician, it is necessary to exclude external factors. Often, users themselves create conditions under which refrigerator compartment cannot reach the desired temperature. Check whether the unit is moved too close to the wall or heating appliances.
Particular attention should be paid to the operating mode. If you have just loaded a large amount of warm food into the chamber, the compressor may simply not be able to cope with the load. Give the equipment time; it usually takes several hours for the temperature to stabilize.
Also check the thermostat settings. During hot seasons, it may be necessary to set lower temperatures. Make sure that the mode Super Freeze (if any) was not accidentally activated in the main chamber.
⚠️ Attention: Never install the refrigerator near (batteries, stoves) or in direct sunlight. This critically affects the heat transfer efficiency of the condenser.
Sometimes the problem is solved by simple defrosting. Even in systems No Frost the drainage hole may become clogged, which will lead to the evaporator freezing and stopping the circulation of cold air.
Malfunctions of the thermostat and temperature sensors
One of the most common reasons why Biryusa refrigerator it does not cool is the failure of the thermostat. This element is responsible for turning the compressor on and off depending on the temperature inside the chamber. If it is “stuck” in the open state, the motor simply will not start.
In modern models with electronic control, temperature sensors (thermistors) are responsible for this function. Their resistance changes as the temperature changes, and if the value is outside the normal range, the control module blocks the start of the compressor, believing that there is already cold, or, conversely, does not see the need to turn it on.
Diagnostics of a mechanical thermostat is often carried out by the method of elimination. You can temporarily close the contacts suitable for the thermostat. If after this procedure the compressor starts working, then the part requires replacement.
- 🔍 Symptoms: The compressor is silent, the light is on, and it is warm inside.
- 🔧 Solution: Replacing the thermostat or NTC sensor.
- ❄️ Nuance: In two-chamber models, a sensor malfunction can lead to the freezer working, but the upper chamber not cooling.
Be careful with the plastic latches.
How to check the thermostat with a multimeter?
To test the mechanical thermostat, remove it and immerse the sensing tube in cold water with ice. Ring the contacts: if the circuit does not close when cooling, the part is faulty. For electronic sensors, resistance is measured, which should change during heating/cooling.
Problems with the compressor and start relay
The heart of the refrigerator is compressor. If it does not start, hums but does not turn on, or turns on for a few seconds and clicks, the problem is most likely in the start protection relay or in the motor itself. The relay is an inexpensive part that is often the first to fail.
When the compressor hums but does not start, this may indicate a wedge in the mechanical part of the motor or an interturn short circuit in the windings. In this case, the unit requires professional repair or replacement of the unit.
In models with inverter compressor diagnosis is more difficult. Here, the electronic unit is responsible for starting, and a hum may indicate problems with the control board or a break in the windings of the motor itself.
| Symptom | Probable cause | Difficulty of repair |
|---|---|---|
| Silence, lamp on | Thermostat, wiring | Low |
| Humming and clicking | Start relay, compressor wedge | Average |
| Works constantly | Freon leakage, compressor wear | High |
| Humming without clicks | Fault windings | High |
If you hear a characteristic metallic clanging sound when starting, this almost always means the start relay needs to be replaced. You can do this yourself by selecting an analogue based on engine power.
Refrigerant leakage and clogged capillary tube
If the compressor operates continuously, hums, but there is no cold (or it is very weak), there is a high probability freon leaks. The refrigerant circulates in a closed circuit, and if the seal is broken, the pressure drops and cooling stops.
A common cause of leaks in refrigerators Biryusa is corrosion of the foamed evaporator (internal circuit), especially in models with crying back wall. Also, freon can escape through solder joints or defects in the factory seam.
Another common problem is clogged capillary tube. Oil breakdown products or moisture entering the system clog the thinnest channel, preventing gas circulation. In this case, the compressor will also work without interruption, trying to pump up pressure.
⚠️ Attention: Self-filling the refrigerator with freon is impossible without special equipment (vacuum pump, pressure gauge station, scales). An attempt to “add gas” without eliminating the leak is useless.
Diagnosing a leak visually is difficult, since the gas is colorless and odorless. The technician looks for the location of damage using a leak detector or by oily spots in the soldering areas.
Malfunctions of the No Frost system and fan
In refrigerators Biryusa with the system No Frost the fan is responsible for circulating cold air. If it stops, the cold does not enter the chamber, although it can be very cold in the freezer compartment (where the evaporator is located).
Often the fan will jam due to ice formed. This happens if the defrost timer or defrost sensor is faulty. Ice blocks the blades, and the fan motor burns out or stops. Defrost heating element, defrost timer or defrost sensor. Ice blocks the blades and the fan motor burns out or stops.
Checking the operation of the fan is simple: open the door of the refrigerator compartment (in some models you need to press the door sensor button, simulating closing) and listen. If there is no sound of rotation, but there is frost on the back wall, the problem is in the defrost system or the fan itself.
- 🌀 Fan: Check the free movement of the blades and the presence of voltage.
- 🔥 Defrost heating element: Rings for resistance (usually 200-700 Ohms).
- ⏱️ Timer/Module: It may not send a command to turn on the defrost mode.
Regular formation of a "fur coat" on the back wall of the freezer is the first signal that the defrosting system is not working correctly and will soon stop cooling completely.
☑️ Diagnostics No Frost
When you need to call a technician
There are a number situations where DIY repairs are impractical or dangerous. If you need to open of the freon circuit, replace the compressor or complex repair of the electronic board, it is better to turn to professionals.
You also need a master if you do not have the skills to work with electrical circuits and measuring instruments. Incorrect diagnosis can lead to the purchase of unnecessary spare parts and aggravation of the breakdown.
It is worth considering the age of the equipment. If your refrigerator Biryusa is more than 10-12 years old, the cost of a major overhaul (compressor + freon + labor) can be up to 70% of the price of a new unit.
⚠️ Attention: When working with the electrical components of the refrigerator, always disconnect the appliance from networks. Capacitors on the control boards can retain charge.
A qualified specialist will not only replace the part, but also conduct a full diagnosis of adjacent components so that the problem does not recur in a month.
Is it worth repairing an old refrigerator?
Repair is advisable if the body is intact, the insulation is not destroyed, and local failure (for example, replacing a thermostat or relay). If a compressor burns out or a leak occurs in the foamed part of the old unit, it is often easier to buy new equipment.
Prevention and care of the Biryusa refrigerator
In order for refrigerator to serve for a long time and not cause problems, it is important to follow the operating rules. Regularly clean the condenser (black grille at the back) from dust. A dust deposit a few millimeters thick can reduce cooling efficiency by 20-30%.
Do not load hot foods into the chamber or overcrowd the refrigerator. Air circulation must be free. Also monitor the condition of the sealing rubber on the doors - if it does not fit tightly, the compressor will work for wear.
Timely defrosting (for drip systems) and cleaning the drainage hole is the key to the absence of ice and mold inside the chamber. These simple steps will extend the life of your equipment.
Why does the Biryusa refrigerator freeze, but the upper chamber does not cool?
Most often this indicates a malfunction of the defrost system (the air supply channel is frozen) or a fan breakdown in No Frost models. In drip systems, the problem may be a freon leak, when the pressure is only enough for the freezer.
Is it possible to replace the compressor on the Biryusa refrigerator yourself?
Theoretically, it is possible if you have the skills to solder copper pipes and work with freon. However, without evacuating the system and accurately dosing the refrigerant, the new compressor will quickly fail. This is a job for the service center.
What to do if the refrigerator makes a loud noise when operating?
Check whether the refrigerator is level (adjust the legs). The noise may come from a fan hitting the ice or compressor tubes rattling. If the noise appears suddenly and is accompanied by knocking, the motor bearings may have collapsed.
How often do you need to defrost the Biryusa refrigerator?
Models with manual defrosting require disconnecting from the network 1-2 times a year. The No Frost and "Weeping Wall" systems are considered self-thawing, but preventive cleaning and drainage checks are recommended every 6 months.