Detection of an ice coat or massive ice on the rear inner wall of the refrigerator compartment is a signal that equipment owners cannot ignore Biryusa. In modern models with a No Frost or drip defrosting system, such a symptom often indicates a malfunction of the automation or a violation of the tightness of the circuit. Many users mistakenly believe that it is enough to simply defrost the unit for the problem to disappear forever, however, without eliminating the root cause, the ice shell will grow again within a few days or even hours.
Refrigerators Biryusa have proven themselves to be reliable equipment, but even time-tested models have failures in the operation of thermostats, defrost heaters or temperature sensors. Understanding the physical processes occurring inside the camera will help you quickly diagnose a problem and make the right decision: call a technician or try to fix the problem yourself. Ignoring the problem can lead to food spoilage and compressor failure.
In this article we will analyze in detail the mechanics of ice formation, consider typical malfunctions and draw up an action algorithm. You will learn how to distinguish normal system operation from a critical failure, and what tools are needed for diagnosis. It is important to approach the issue systematically, checking each component sequentially.
The principle of operation of the cooling system and natural ice
To understand why icing occurs, it is necessary to briefly consider the principle of operation of the refrigeration unit. Most models Biryusa use an evaporator hidden behind the rear plastic panel. When the compressor operates, the refrigerant circulates through the tubes, taking heat from the chambers. During the cooling process, the moisture contained in the air condenses on the coldest surface - precisely on this back wall.
In a working device, this condensate flows into a special groove and through the drainage channel enters the container above the compressor, where it evaporates. However, if the system automatic defrosting fails, the water does not have time to drain and freezes, forming a layer of ice. In models with manual defrosting, a small amount of frost on the back wall is an absolutely normal operating process until the device is scheduled to shut down.
⚠️ Attention: If the thickness of the ice on the back wall exceeds 5-7 millimeters, this is no longer the norm, but a sign of a malfunction that requires intervention.
Particular attention should be paid to the tightness of the door seal. If the elastic does not fit tightly, warm, moist air from the room constantly enters the chamber. This air cools, moisture falls in the form of dew and instantly freezes on the cold walls. You can check the seal in a simple way: hold a sheet of paper with the door and try to pull it out - if it comes out easily without resistance, the seal is broken.
Faults in the defrost system (for No Frost and drip models)
The most common cause of excessive ice freezing in refrigerators Biryusa s automatic defrosting is the failure of one of the elements of the defrosting system. This unit is responsible for periodically turning on the heater, which melts the ice on the evaporator. If the cycle is disrupted, the ice does not have time to melt and gradually blocks the air circulation channels.
The system includes a heating element (tubular electric heater), a defrost sensor and a timer (or electronic control module). The heating element may burn out due to a power surge or natural wear. The sensor that controls the temperature of the evaporator may “stick” in the “cold” position, not giving a command to turn on the heating. The control module may also stop supplying voltage to the heating elements.
How to check the defrost heating element?
To check the heating element you will need a multimeter in resistance measurement mode. You need to get to the evaporator (by removing the back panel in the freezer), disconnect the wires from the heating element and ring it. If the device shows a break (infinity), the heater is faulty and requires replacement.
Diagnostics of these components requires partial disassembly of the refrigerator and the presence of measuring instruments. If you do not have electrical skills, it is better to entrust this procedure to a specialist. Replacing the heating element yourself is possible, but requires care when removing plastic panels, which become brittle in the cold.
Problems with the thermostat and temperature sensors
A thermostat (thermostat) is a device that controls turning the compressor on and off depending on the temperature inside the chamber. If this device is faulty, it may not turn off the motor-compressor in time. As a result, the refrigerator works without interruption, trying to cool the chamber to unattainable values, which leads to deep freezing of moisture on the back wall.
In models with electronic control, the role of a thermostat is performed by air temperature sensors. They may give incorrect readings due to contact oxidation or internal failure. For example, a sensor can “tell” the module that it is warm in the chamber, although in fact the temperature there is already below freezing. The compressor will work continuously, causing excessive freezing.
- 🌡️ Sign of breakdown: the compressor hums constantly, without turning off for hours, and the food in the main chamber begins to freeze.
- 🔌 Sign of breakdown: the refrigerator does not turn on at all or turns on for a very short time, without reaching the desired temperature.
- ❄️ Sign of breakdown: a “fur coat” forms on the back wall, and the temperature in the chamber is higher than the established norm.
Replacing the thermostat in refrigerators Biryusa is usually not difficult, since access to it is often located inside the chamber or on the back of the case. It is important to choose an analogue with exactly the same characteristics, especially the length of the capillary tube and the temperature range of operation.
Freon leakage and blockage of the capillary tube
The situation when a local spot of ice forms on the back wall of the refrigerator compartment (often in the form "sockets" or stripes) and the rest of the wall is dry may indicate a refrigerant leak or a blockage in the circulation system. In normal mode, the entire evaporator is cooled evenly. When freon leaks, the pressure in the system drops, and the refrigerant boils only at the beginning of the evaporator circuit, where an ice plug forms.
Clogging the capillary tube with wear products of the compressor oil or moisture leads to a similar effect. Freon circulation is disrupted, the refrigerator operates under increased load, but does not cool properly. Products may deteriorate, while the back wall will be covered with an uneven layer of frost.
⚠️ Attention: Freon leaks and blockages are complex technical faults. To eliminate them, you need special equipment for evacuation and filling the system, as well as skills in soldering copper tubes.
An attempt to fix the leak yourself without finding the location of the damage and high-quality evacuation will only lead to a short-term effect. Freon will again leave through a microcrack, and moisture that entered the system during unqualified repairs will cause re-freezing and failure of the compressor.
Violation of operating and placement rules
The cause of icing does not always lie in a technical breakdown. Often, users themselves create conditions for the formation of ice, violating the rules for operating equipment Biryusa. Frequent and prolonged opening of doors, especially in hot weather, leads to rapid saturation of the air inside the chamber with moisture, which instantly settles on cold surfaces.
Placing hot or warm foods in the refrigerator is another common mistake. Evaporation from hot soup or roast creates enormous moisture that the dehumidification system may not be able to handle. The water does not have time to evaporate and freezes on the back wall, forming a thick layer of ice.
It is also important to monitor the temperature. Setting the regulator to maximum cooling (usually a value of 6 or 7) causes the compressor to run almost non-stop. This leads to over-freezing of food and intense freezing of ice, especially if the room is hot.
Instructions for defrosting and diagnosing yourself
If you find ice, the first step should be to completely defrost the refrigerator. This will remove any excess ice and see if the problem reoccurs. It is important to defrost the unit correctly so as not to damage the internal elements and the evaporator.
Unplug the refrigerator, remove all food and leave the doors open for at least 12-24 hours. Do not use a hairdryer or hot water to speed up the process, as sudden temperature changes can damage the plastic and evaporator tubes. After defrosting, wipe the chamber dry and turn on the device without load.
☑️ Complete defrosting algorithm
If, after proper defrosting and observing the temperature regime, the ice crust appears again within 2-3 days, then the reason lies in a technical malfunction of one of the components described above. In this case, a more in-depth diagnosis will be required.
Comparative table of symptoms and causes
For ease of diagnosis, we suggest that you familiarize yourself with the table that systematizes the main symptoms of malfunctions. This will help you quickly navigate the nature of the refrigerator breakdown Biryusa.
| Symptom | Probable cause | Difficulty of repair | Necessary actions |
|---|---|---|---|
| Ice all over the back wall | Malfunction of the defrosting system (heating element, sensor) | Medium | Ring the heating element and sensors, replace burnt elements |
| The compressor does not turn off | The thermostat is faulty or there is a freon leak | High (if there is a leak) | Replace the thermostat or call a technician to find a leak |
| Icy "socket" on the wall | Freon leak or capillary blockage | High | Requires professional refilling and soldering |
| Ice only at the door | The tightness of the seal is broken | Low | Replacing or restoring the magnetic tape |
Analysis of symptoms allows you to weed out simple problems that can be solved by defrosting from serious technical failures. Remember that timely contact with a specialist can save the compressor from overload and expensive repairs.
Prevention and care of the Biryusa refrigerator
To avoid the reappearance of ice and extend the life of your refrigerator, it is necessary to regularly carry out preventive measures. Cleaning your drainage system is a simple procedure that can be done every six months. Use a soft brush or a long wire with cotton wool to clean the water drainage channel.
Monitor the condition of the sealing rubber. Wash it periodically with warm soapy water and lubricate it with silicone lubricant or glycerin to maintain elasticity. If the rubber band has lost its shape, you can try to straighten it by heating it with a hair dryer, but it is better to replace it immediately.
Do not overload the shelves with products and do not place them close to the back wall. This disrupts the circulation of cold air and can lead to local hypothermia and ice freezing in certain areas. Compliance with these simple operating rules will ensure the stable operation of your refrigerator Biryusa for many years.
Is it possible to use a knife or sharp objects to chip ice?
It is strictly not recommended. Using sharp objects can damage the evaporator tubes, which are very close to the surface. A puncture will lead to immediate release of freon and expensive repairs with replacement of the evaporator.
Why does the Biryusa refrigerator not turn off after defrosting?
If after complete defrosting the compressor continues to work without interruption, this indicates a malfunction of the thermostat, a freon leak, or a problem with the control module. It is necessary to diagnose the electrical circuit.
How often do you need to defrost a Biryusa refrigerator with a drip system?
Models with a drip system (“Crying Wall”) are recommended to be defrosted completely at least once every 4-6 months for hygienic treatment and checking the operation of the drainage, even if there is little visible ice.