The situation when a loved one Biryusa refrigerator suddenly stops freezing can take you by surprise and lead to spoilage of significant food supplies. Owners of equipment, especially good old models, often encounter the fact that it becomes warm in the main chamber, and the ice melts in the freezer, or, conversely, the unit hums, but does not produce cold at all. This does not always mean that the device has completely failed and requires replacement with a new one.
Before calling a technician or buying a new unit, it is worth carrying out the initial diagnostics yourself. Often the reason lies in trivial things: incorrect position of the housing, incorrect thermostat settings, or even too dense loading of the chambers with food. However, if simple methods do not help, you will have to deal with technical components, such as compressor, thermostat or a defrost system.
In this article we will analyze in detail all the possible reasons for the lack of cold in brand refrigerators. Biryusa, from simple operating errors to complex technical breakdowns. You will learn how to distinguish a problem that you can fix yourself from a problem that requires professional attention and spare parts. Understanding the operating principles of your unit will help save time and money.
Primary diagnosis and external factors
First of all, it is necessary to exclude external factors that are often ignored by users. If Biryusa refrigerator stands close to the wall or sideways to the furniture, the air circulation around the condenser is disrupted. This leads to overheating of the motor and reduced cooling efficiency. Make sure that the gap between the back of the appliance and the wall is at least 5-7 centimeters.
It is also worth checking the position of the unit itself. If the floor is uneven or the legs of the refrigerator are not adjusted correctly, the door may not fit tightly. Even a microscopic gap allows warm air to constantly penetrate inside, causing the compressor to wear out without reaching the desired temperature. Try tightening the adjusting supports.
Pay attention to the loading density of the chambers. If you have just placed a large amount of warm food or, conversely, packed the freezer too tightly, the circulation of cold air may have been disrupted. In models with the No Frost system, this is critically important, since the air channels can be blocked by packages.
⚠️ Attention: If you notice that the rubber seal on the door is cracked or has lost elasticity, no amount of adjusting the legs will help. Warm air will pass through microcracks, and the refrigerator will not be able to maintain the temperature.
Problems with the thermostat and temperature sensors
One of the most common reasons why Biryusa refrigerator does not freeze is the failure of the thermostat (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 “off” position, the motor simply will not start, and you will hear silence instead of the usual hum.
In modern models with electronic control, the control module is responsible for this process. If the sensor transmits incorrect data (for example, that the chamber is already -20°C, although it is +10°C), the controller will not give a command to start cooling. Diagnostics of such systems requires a multimeter to check the resistance. temperature sensor and a control module. If the sensor transmits incorrect data (for example, that the chamber is already -20°C, although it is +10°C), the controller will not give a command to start cooling. Diagnosis of such systems requires a multimeter to check resistance.
Signs of a malfunctioning thermostat in mechanical models often manifest themselves in the fact that the refrigerator either does not turn on at all, or works non-stop, freezing everything into “stone”, but not cooling the main chamber evenly. In some cases, temporarily closing the contacts helps, but this is only a diagnostic measure.
How to check a thermostat without instruments?
Unplug the refrigerator, remove the regulator knob and get to the terminals. Connect the two main wires to each other (not to ground!). Plug in the unit. If the compressor starts working, the thermostat is faulty and requires replacement.
Replacing the thermostat is a procedure accessible to a home handyman, but requires caution. The capillary tube of the new sensor must be installed exactly the same as the old one, otherwise it will read the temperature incorrectly. The length of the tube and the location of its attachment play a decisive role in correct operation.
Faults of the compressor and start relay
The heart of any refrigerator is the compressor. If Biryusa it hums, clicks, but does not start, or starts for a couple of seconds and immediately stalls, the problem most likely lies in the start-protection relay or the motor itself. The relay is an inexpensive part that often fails first, protecting the engine from overloads.
Signs of a compressor malfunction can be different. Sometimes it simply overheats and is switched off by a thermal release. In other cases, a characteristic metallic clanging sound is heard when trying to start. This may indicate that the piston group is jammed or the motor winding is broken.
- 🔌 Click and silence: The relay click is heard, but the motor does not start - the starting winding is probably burned out or the compressor is jammed.
- 🔥 Overheating: The compressor housing becomes hot in a few minutes operation, followed by shutdown.
- 📉 Weak pressure: The motor runs constantly, but does not create the necessary pressure for freon circulation.
If diagnostics have shown that it is faulty compressor, repairs at home are almost impossible. The unit needs to be replaced, the system evacuated and charged with refrigerant. This is work for a specialist with professional equipment.
Freon leakage and capillary system blockage
Refrigerant (freon) is the working fluid that transfers heat from the chambers to the outside. There are no consumables in the system, so if Biryusa refrigerator stopped freezing due to a lack of freon, it means the circuit has depressurized. Freon does not disappear on its own, it evaporates through microcracks in the evaporator or condenser tubes.
Often a leak occurs in the foamed part of the housing where the evaporator tubes are located. Metal corrosion makes the tube walls thin over time, and any vibration can lead to a fistula. It is difficult to notice this visually, but an indirect sign is swelling of the side wall of the refrigerator or the appearance of rusty spots.
Another problem that is symptomatically similar to a leak is clogged capillary tube. Oil circulates in the system, which over time can thicken or mix with breakdown products, forming a plug. In this case, there is freon, but it cannot circulate through the system.
| Symptom | Probable cause | Characteristic symptom |
|---|---|---|
| The refrigerator hums, but does not freeze | Freon leak | The compressor is hot, the condenser (grid at the back) is cold |
| The freezer works, the refrigerator compartment does not | Capillary clogged | The lower part of the condenser is warm, the upper part is cold |
| The compressor turns on for 10-20 seconds and turns off | Lack of freon / Clogging | Thermal protection of the motor is triggered |
To eliminate a leak or blockage, you need to find the location of the damage (often using nitrogen pressure testing), soldering the tubes and completely refilling the system. It is impossible to carry out these operations independently without a pressure gauge station and scales.
Failures in the defrost system (for No Frost models)
If you have a modern Biryusa with a No Frost system, and it has stopped freezing, while the fan inside is working, but the cold is not coming out, most likely the drainage is clogged or has come out building Defrost heating element. In such models, frost builds up on the hidden evaporator, and if it does not thaw, the ice blocks the air channels.
The defrost system consists of a heater (heating element), a timer (or electronic module) and a defrost sensor. If one of these elements breaks, the evaporator becomes overgrown with a “fur coat”. Air cannot pass through the ice plug to the products, and the temperature in the chambers rises, although the compressor can operate continuously.
- ❄️ Defrost heating element: The heater spiral burns out, the ice does not melt.
- ⏱️ Timer/Module: Does not give a command to turn on the defrost mode.
- 🌡️ Defrost sensor: Incorrectly reads the evaporator temperature, interrupting the heating cycle ahead of time.
You can diagnose the problem by manually defrosting the refrigerator for 24 hours with the doors open. If after turning it on it starts to freeze like new, but after 1-2 weeks the problem returns, the problem is definitely in the defrosting system.
⚠️ Attention: Do not try to beat off the ice with a knife or sharp objects inside the No Frost chamber. You can damage the aluminum tubes of the evaporator, which will lead to an immediate leak of freon and expensive repairs.
Rare breakdowns: control module and ventilation
In electronic models Biryusa the control module is responsible for all processes. Voltage surges in the network can lead to failure of the electronic components of the board. In this case, the refrigerator may behave chaotically: turn on and off spontaneously, not respond to buttons, or show an error on the display.
It is also worth mentioning the fan in the No Frost system. If it stops, cold air stops being forced to circulate through the chambers. You can hear the engine humming, but there is silence inside. Often the reason is simple: freezing of the fan blades to ice.
Repairing the control module requires deep knowledge of electronics. It is often cheaper and more reliable to replace the entire board with a new one, selected by part number. However, before replacing the “brains”, always check the integrity of the wiring and sensors so as not to burn the new part.
☑️ Actions in case of suspected electronic failure
Frequently asked questions (FAQ)
Why is the Biryusa refrigerator so strong freezes, but does not turn off?
This is a sign of a malfunction of the thermostat or temperature sensor. The mechanism is “stuck” in the maximum cold position and does not give the command to the compressor to stop. It is also possible that the seal of the door is broken, and heat constantly flows inside, forcing the unit to work at the limit.
Is it possible to operate the refrigerator if it stands on its side?
It is possible to transport refrigerator on its side, but it is absolutely forbidden to plug it into the network immediately after installation. The oil from the compressor should drain back into the crankcase. The minimum settling time after vertical installation is 4-6 hours, and after transportation on its side, it is better to wait a day.
What does the flashing temperature indicator on Biryusa mean?
Flashing usually signals an increase in the temperature in the chamber above the permissible norm. This can happen either immediately after turning on an empty refrigerator, or during a malfunction (freon leak, compressor failure). If the blinking does not stop after several hours of operation, call a technician.
How often do you need to defrost the Biryusa refrigerator?
Models with manual defrosting require disconnecting from the network when an ice crust of 3-5 mm thick forms. This usually happens once every 3-6 months. No Frost and Low Frost systems do not require regular defrosting; it is enough to wash the chambers 1-2 times a year for hygiene.