The situation when in a two-chamber refrigerator Biryusa the upper chamber stops cooling food, while the lower (freezer) continues to freeze properly, is one of the most common complaints from owners. This behavior of equipment often confuses users: the motor seems to be humming, the light seems to be on, but in the refrigerator compartment the temperature rises to room temperature. This does not mean that the unit is completely out of order, but the problem cannot be ignored, since the products can quickly deteriorate.
The reasons for such a temperature imbalance can be hidden either in simple settings or violation of operating rules, or in serious technical malfunctions of the system No Frost or the heat removal circuit. In most cases, if the freezer is working, it means that the compressor is working and the refrigerant is circulating, but the heat exchange process in the upper compartment is disrupted. Understanding the physics of the process will help you quickly diagnose the problem and make a decision: call a technician or try to fix the problem yourself.
In this article we will analyze in detail the main failure scenarios typical for refrigerators Biryusa with a drip system and a system No Frost. We will look at how the condition of the seals, the operation of the sensors and the integrity of the freon circuit affect the overall cooling efficiency. It is important not to panic, but to consistently check each unit in order to avoid unnecessary repair costs.
Tightness failure and problems with seals
One of the most banal, but common reasons that the refrigerator Biryusa stopped freezing in the upper compartment, the door does not fit tightly. If the rubber seal around the perimeter of the door is dirty, deformed, or simply worn out over time, warm air from the room constantly enters the chamber. The compressor, trying to compensate for this heat influx, works in increased mode, but often cannot cope with cooling a large volume, while the freezer, which has a smaller volume and denser insulation, continues to maintain the temperature.
Checking the tightness is the first thing to do. Visually inspect the rubber around its entire perimeter for cracks, tears, or contamination that would prevent a tight seal. Often the problem lies in small crumbs or sticky residue that prevents the door from closing completely. Also pay attention to the design of the door itself: if it is skewed due to long opening or heavy loading, the seal will not fit over the entire area.
⚠️ Attention: If you find that the seal has lost its elasticity and has hardened, traditional methods such as treatment with boiling water can only give a temporary effect. In this case, a complete replacement of the part is necessary to restore energy efficiency.
For an accurate diagnosis, use a simple test with a sheet of paper. Clamp the sheet with the door in different places around the perimeter. If the paper falls out or is pulled out without resistance, it means that the seal is broken in that area. This leads to constant freezing of the rear wall and ineffective operation of the cooling system as a whole.
- 🧼 Wash the rubber seal thoroughly with warm water and soap, removing all grease and deposits.
- 📄 Carry out a test with a sheet of paper around the entire perimeter of the door to find leaking areas.
- 🔍 Inspect the door hinges for sagging, which can create a gap.
Malfunctions of the defrost system in No Frost models
If your refrigerator Biryusa is equipped with a system No Frost (or Low Frost), and the freezer is freezing, but the refrigerator compartment is warm, then with a 90% probability the problem lies in the evaporator defrost system. In such models, cold is forced into the upper chamber by a fan through special channels. If the evaporator, located behind the back wall of the freezer, becomes covered with an ice coat, the air stops circulating, and the cold simply does not reach the upper compartment.
Several key elements are responsible for the defrosting process: heating element (heater), defrost sensor (thermostat) and timer (or electronic control module). If at least one of these components fails, the ice does not melt, builds up and blocks the air channels. Visually, this may manifest itself in the fact that the back wall of the freezer is covered with a thick layer of ice or snow, and the fan is humming but not blowing.
How to defrost the refrigerator to check?
Unplug the refrigerator for 10-12 hours with the doors open. If, after turning it on, it starts to freeze normally, but after 1-2 weeks the problem repeats, the defrosting system is faulty.
Often, owners are faced with a burnout of the defrosting heating element. This is a heating element that turns on on a timer and melts the ice on the evaporator. If it burns, the ice doesn't go anywhere. The defrost sensor may also be stuck, which “thinks” that there is no ice and does not give a command to turn on the heating. In models Biryusa with electronic control, the control module itself can fail.
For diagnostics, you need to remove the back panel in the freezer (after defrosting the unit) and check the integrity of the heating element with a multimeter. The patency of the drainage hole through which water flows into the tray above the compressor is also checked. If the hole is clogged with debris or ice, water will accumulate inside and freeze, exacerbating the problem.
- ❄️ Ice on the back wall of the freezer is the main sign of a defrost system failure.
- 🔌 The absence of cold in the upper compartment when the compressor is running indicates blockage of the air ducts.
- 🛠 To replace the heating element or sensor, partial disassembly of the inside of the freezer is required.
☑️ Diagnostics of the No Frost system
Problems with the compressor and refrigerant
The situation when the freezer is working, but the refrigerator is not, may indicate a loss of compressor performance or a leak freon. In dual-circuit systems or systems with one compressor and solenoid valve, the refrigerant first passes through the freezer and then goes to the refrigerator compartment. If there is little gas in the system (leak), it is only enough for the first circuit (freezer), and it simply does not reach the top or does not have time to release the cold.
A freon leak is a serious malfunction that cannot be eliminated without special equipment and skills. Leak points are often located in the foamed part of the housing or in the solder joints of the tubes. An indirect sign of a leak may be the quiet operation of the compressor (it cannot gain pressure) or its continuous operation without shutting down, since temperature sensors do not record the achievement of the required values.
⚠️ Attention: Freon used in modern refrigerators is odorless and colorless. The leak cannot be detected by smell. If you hear hissing or see oily spots on the tubes at the back, this is an alarming signal.
Another possible reason is a clogged capillary tube. A blockage from oil or moisture breakdown products may form in the refrigerant circulation system. This prevents the normal flow of freon. As a result, the pressure in the system drops and cooling of the upper chamber stops. Diagnosis of a blockage requires professional intervention and purging the system with nitrogen.
If the compressor operates with strong vibration, hums louder than usual, or, conversely, makes strange clicking sounds, this may indicate its mechanical wear. In such cases, the motor may not create enough pressure to pump freon through both circuits, limiting itself only to the freezer compartment.
| Symptom | Possible cause | Required actions |
|---|---|---|
| The compressor runs non-stop | Freon leak or blockage | Call a technician to find a leak |
| The freezer is freezing, the top is warm | Lack of refrigerant | Refilling and soldering circuit |
| Loud knocking sound when starting | Compressor wear | Replacement of the compressor |
| Pipes at the rear are hot | Normal operation or clogged | Diagnostics of pressure in the system |
Incorrect setup and operation
Before looking for complex technical faults, it is worth eliminating the human factor. In refrigerators Biryusa with electronic control, a failure in the temperature settings can lead to the upper chamber not working correctly. For example, if the “Super Freeze” or “Vacation” mode is activated without a corresponding need, the operating algorithms may shift.
It is also important to consider the location of the products. If you pressed the shelves tightly against the back wall, you could be blocking the vents that allow cool air to enter the chamber. Impaired air circulation leads to local overheating and incorrect temperature sensor readings. Products must be positioned so that air can freely wash them from all sides.
Frequent and prolonged opening of doors, especially in the hot season, creates excess humidity and heat stress. The refrigerator Biryusa may not have time to restore the temperature regime, and while it is trying to cool the top, the temperature in the freezer will already rise, or the system will go into emergency mode.
- 🌡 Check the set temperature: it is optimal for the refrigerator compartment +2...+5°C.
- 🚫 Do not place hot foods inside - this sharply increases humidity and load.
- 💨 Leave a gap of 2-3 cm between the food and the back wall for circulation.
Faulty thermostat or sensors
The thermostat (in mechanical models) or an electronic temperature sensor (in models with a display) is responsible for turning the compressor on and off. If this element fails and “lies”, showing the control module that it is cold in the chamber, although in fact it is warm there, the compressor simply will not turn on to cool the upper compartment (in two-compressor models) or will work incorrectly.
In refrigerators with one compressor and a solenoid valve, a faulty sensor in the refrigeration chamber may not give the command to open the valve to supply freon to the this circuit. As a result, freon circulates only through the freezer evaporator. Diagnostics is carried out by testing the sensor with a multimeter at different temperatures.
Often the problem lies in oxidation of the contacts or a break in the wiring going to the sensor. Vibration from compressor operation can damage the connection over time. In such cases, the repair may take a little time if the technician quickly gets to the wiring harness.
It is worth noting that in some models Biryusa the thermostat is located inside the chamber and has a capillary tube. If the tube is damaged or has lost its tightness, the regulator no longer senses the temperature and requires a complete replacement.
Failures in the operation of the electronic control module
Modern refrigerators Biryusa are controlled by electronic boards. Voltage surges in the network, moisture ingress, or simply aging of the elements can lead to “glitches” of the module. The board may incorrectly read sensor readings or may not supply voltage to the defrost heating element, fan or circuit switching valve.
Signs of a module malfunction may include random blinking of indicators, lack of response to control buttons, or turning on the refrigerator immediately at full power without stopping. Sometimes a reboot helps: disconnecting from the network for 15-20 minutes. If the problem persists after switching on, an electronics failure is likely.
Repairing the control module requires high qualifications. It is often cheaper and more reliable to replace the entire board than to look for a burnt capacitor or relay. However, before replacing an expensive module, you need to make sure that all actuators (heating elements, fans, valves) are in good working order, since their short circuit could damage the board.
⚠️ Attention: If you notice traces of burning, melting or swelling of capacitors on the control board, further connecting the refrigerator to the network can be dangerous. Diagnostics by an electrician is required.
In some cases, the problem may not be in the refrigerator itself, but in the quality of the power supply. Unstable voltage can lead to resets or incorrect operation of the controller. Installing a voltage stabilizer will help protect equipment in the future.
Is it possible to repair the module yourself?
Theoretically, you can replace the fuse or relay if you have soldering skills. But without a circuit diagram and experience in diagnosing electronics, there is a high risk of permanently damaging the board.
Frequently asked questions (FAQ)
Why does the Biryusa refrigerator work non-stop and does not turn off?
This may occur due to a freon leak, a malfunction of the thermostat, or a broken door seal. The unit tries to compensate for the loss of cold by operating in constant mode. Also, the cause may be a clogged capillary tube.
How long should defrosting last with the No Frost system?
Full defrosting of the refrigerator Biryusa with the No Frost system for resetting errors and thawing ice in hidden cavities should last at least 12-24 hours with open ones doors. Short defrosting of 2-3 hours is often ineffective.
Is it possible to use a refrigerator if the upper chamber does not freeze?
Short-term - yes, if you store products there that do not require strong cooling. However, long-term operation in this mode is harmful to the compressor, which operates under overload. In addition, bacteria quickly multiply in a warm chamber.
Where is the defrost sensor in Biryusa?
In most models, it is located on the evaporator in the freezer, often attached to an aluminum groove or next to the heating element. To gain access, you need to remove the rear plastic panel inside the freezer.
What should you do if, after defrosting, the refrigerator started working, but after a week it stopped working again?
This is a classic sign of a malfunction of the automatic defrosting system (the heating element, sensor or timer burned out). Defrosting temporarily clears the ice blockage, but since the system does not remove new condensation, the problem returns. Repair is needed.