Situation, when Biryusa refrigerator it starts to freeze more than usual, it often takes owners by surprise. Just yesterday the products felt great, but today the milk on the shelf has turned into an ice block, and the vegetables have lost their elasticity and darkened. This is not just a minor inconvenience, but a signal that a failure has occurred in the cooling system that requires immediate intervention.
Hypothermia of the chamber can be caused by both a banal human factor, for example, incorrect installation of the thermostat, and serious technical malfunctions of the unit. Double-compressor models and systems No Frost reacts to breakdowns in different ways, so it is important to correctly diagnose the source of the problem. Ignoring symptoms often leads to spoilage of supplies and an increase in electricity bills.
In this article we will examine in detail why refrigeration equipment the Biryusa brand exceeds the specified temperatures. You will learn how to check the settings yourself, when you need to call a technician, and which components most often fail. Understanding the principles of operation of your equipment is the first step to its long and efficient operation.
⚠️ Attention: If you notice that a thick coat of ice has formed on the back wall of the chamber, and the compressor is working non-stop, immediately defrost the unit before starting any diagnostics.
Checking the settings thermostat and operating mode
The most common reason why refrigerator starts to work in enhanced mode lies in lost or incorrectly set settings. Owners often accidentally touch the temperature control while cleaning or loading food, turning it to the maximum power position. In models with electronic control, a software failure may have occurred that returned the factory settings with a lower temperature.
You must carefully inspect the control panel. If you have a mechanical model, the thermostat knob should be in the middle position, usually numbers 2 or 3 out of 5 possible. For electronic models, the optimal range is considered to be +3 to +5 degrees Celsius. Winter modeIf activated incorrectly in a warm room, it can also cause the compressor to work harder.
It is worth considering that the room temperature directly affects the operation of the equipment. If the kitchen becomes colder, for example due to a draft or the air conditioner being turned on, thermostat it may not read data correctly if it is not compensated. Check whether the refrigerator is too close to a window or a cold source.
⚠️ Attention: The design and location of controls may vary depending on the year of manufacture and model series. Check the technical documentation of your device to accurately determine the standard values.
Malfunctions of the defrost system in No Frost models
Owners of modern Biryusa models with the system No Frost often face the problem of uneven cooling. If the evaporator hidden behind the back panel becomes iced up due to a malfunction of the defrost system, cold air will no longer circulate normally. As a result, the sensors record an insufficiently low temperature in the chamber and force the compressor to work continuously.
The main culprits here are Defrosting heating element, a timer or a defrost sensor. When one of these elements fails, ice freezes on the evaporator, blocking the air passages. The fan begins to hum or stops altogether, and the food in the main chamber freezes due to the lack of proper air exchange.
How to check the defrosting heating element?
To check the defrosting heating element, you need to call it from a hidden state (by defrosting) and ring multimeter. The resistance of a working heater is usually from 200 to 400 ohms. If the device shows a break, the element requires replacement.
Diagnostics requires partial disassembly of the freezer. It is necessary to remove the rear plastic panel and visually assess the condition of the evaporator. The presence of massive ice build-ups while the compressor is running is a sure sign of a problem with defrost cycle.
Problems with temperature sensors and thermostat
If the Biryusa refrigerator freezes too much, but there is no ice coat on the evaporator, most likely the problem lies in the “brains” of the system — sensors. Thermostat (in mechanical models) or thermistor (in electronic models) are responsible for sending a signal to turn off the compressor. If this signal does not arrive or arrives late, the unit continues to freeze until the emergency protection is activated.
In mechanical thermostats, the bellows tube filled with freon often depressurizes. The gas evaporates and the membrane stops opening the contacts. In electronic models, thermistors change their resistance characteristics over time, transmitting incorrect data about the temperature inside the chamber to the control board.
Replacing the sensor is a relatively simple procedure, but requires precision. It is important to select an element with identical characteristics, since even a slight deviation in the nominal value will lead to a recurrence of the problem. Control board in such cases it is often operational, but receives false commands from the periphery.
Failure of the thermal control damper
In two-chamber In Biryusa refrigerators with one compressor, cold from the freezer is supplied to the refrigeration compartment through a special channel, closed air damper. This damper opens and closes at the command of the electronics, regulating the flow of cold air. If the mechanism is jammed in the open position, an excess amount of cold will enter the refrigerator compartment.
The cause of jamming may be icing of the mechanism or failure of the damper drive motor. Visually, this is manifested by the fact that the products at the back wall of the refrigerator compartment are covered with frost, while in the freezer the temperature may be normal or even higher than normal due to cold leakage.
To check, it is necessary to remove the air duct, usually located in the upper part of the refrigerator compartment. The mechanical obstacle can be removed by defrosting, but if the damper drive is burned out, it will need to be replaced. Ignoring this breakdown will lead to rapid spoilage of fresh food.
⚠️ Attention: Do not try to forcibly open or close the damper with your hands without turning off the power - this may damage the plastic drive gears.
Refrigerant leakage and problems with the compressor
Although a freon leak is most often associated with insufficient cooling, in some cases it can lead to a paradoxical effect. If refrigerant leaves through a microcrack, the system loses efficiency and the compressor begins to work non-stop, trying to reach the set temperature. As a result, hypothermia may be observed in the freezer while the refrigerator is warm.
Another option is a malfunction of the compressor itself or the start relay. If the compressor valves are worn out, it may not develop the required pressure, but at the same time work in enhanced mode. The motor-compressor overheats, hums, but does not ensure uniform distribution of cold along the circuit.
Diagnostics of a leak requires special equipment. The technician uses a leak detector or a method of painting the system. It is difficult to determine the location of the leak on your own, but an indirect sign is oily residue (oily stains) at the junction of the tubes or near the compressor.
The influence of external factors and operating conditions
The reason does not always lie inside the unit. External factors may force refrigerator work to the limit of your capabilities. Check the tightness of the rubber seals around the perimeter of the door. If the rubber has dried out, become dirty or deformed, warm air constantly enters the chamber, causing the equipment to freeze more actively.
It is also important to consider the location of the refrigerator. Installation close to the wall, near the radiator or in direct sunlight disrupts the heat exchange of the condenser. Ventilation gaps must be observed according to the instructions, otherwise the compressor will overheat and work without rest.
☑️ Checking the operating conditions
Frequently opening the door or placing hot food in the chamber also creates extreme stress. In such cases, the system may not have time to stabilize, creating the illusion of a malfunction, although in fact it is a reaction to a violation of operating rules.
Summary table for diagnostics of faults
For the convenience of analyzing the situation, we suggest using a table that will help compare symptoms with probable causes. This will allow you to better prepare for a conversation with a technician or decide to repair it yourself.
| Symptom | Probable cause | Necessary actions |
|---|---|---|
| Ice on the back wall, the compressor is humming | Malfunction of the defrost system (No Frost) | Check the heating element, defrost sensor, timer |
| Food freezes, the light is on constantly | Thermostat or thermistor is faulty | Replacement temperature sensor |
| It’s cold only at the back wall | The air damper is jammed | Defrosting, checking the damper drive |
| The compressor runs without stopping | Leakage freon or compressor wear | Call a technician to find a leak |
| Uneven cold, ice on the door | Damaged seal | Replace or restore the seal |
When a call to a specialist is necessary
Despite the possibility of self-diagnosis of many components, there are situations when the intervention of a professional is strictly necessary. If the problem lies in the refrigerantthe system needs to be evacuated and charged with a special type of freon, which cannot be done without expensive equipment. Attempts at self-repair in this case can permanently damage the unit.
You should also contact a technician if the problem does not disappear after defrosting and checking the electrical circuits. Complex electronics, including control modulesrequire skilled re-soldering or replacement. In addition, a specialist will be able to accurately determine whether it is worth repairing the old refrigerator or whether it is more economically feasible to purchase a new one.
Regular maintenance and timely response to changes in the operation of equipment will extend the life of your Biryusa refrigerator. Do not ignore the first signs of hypothermia, as this can lead to more serious damage to the compressor.
Frequently asked questions (FAQ)
Why does the Biryusa refrigerator only freeze in one corner?
Most often this indicates a malfunction of the air circulation system. In No Frost models, the air supply duct may be clogged or the damper may be jammed. In drip models, local freezing of the evaporator is possible due to a lack of freon.
Is it possible to replace the thermostat in the Biryusa refrigerator yourself?
Yes, if you have basic skills in working with tools and a multimeter. The process involves removing the old part, installing a new one with similar characteristics and adjusting the temperature. However, it is important to observe safety precautions when working with electricity.
How often should you defrost the refrigerator to avoid problems?
Models with the No Frost system do not require manual defrosting more than once a year (for hygiene). It is recommended to defrost drip systems as ice forms, but at least twice a year, in order to prevent channels and compressor overload.
What should you do if, after defrosting, the refrigerator starts to get very cold again?
This is a sure sign of a technical malfunction, most likely associated with sensors or the defrost system. Defrosting had a temporary effect, removing the ice, but did not eliminate the cause of its formation. Diagnostics of the control units is necessary.
Does the temperature in the room affect the operation of the refrigerator?
Yes, significantly. If the room is too cold (below +10°C), the oil in the compressor may thicken and the thermostat will not turn on the motor. If it is too hot, the compressor will work hard trying to maintain cold, which can lead to overcooling of the chambers.