The situation when it is warm in the refrigerator compartment, food begins to spoil, but the freezer continues to freeze properly, is one of the most common and alarming for owners of household appliances. This behavior of the unit often confuses: the compressor seems to be humming, the light is on, but there is no desired cold in the main compartment. There is no need to panic in this casesince in many cases the problem can be solved without calling a technician, although it requires careful diagnosis.
There may be reasons for such a temperature imbalance many: from a banally loosely closed door to a serious freon leak or failure of electronics. Modern two-chamber models are more complex than the old single-compressor “boxes”, and a violation of the circulation of refrigerant or air in them manifests itself in exactly this way. Understanding the operating principle of your equipment will help you quickly localize the problem.
In this article we will analyze in detail the algorithm of actions that will allow you to determine the nature of the malfunction. You will learn in which cases you can handle it yourself and when you need to call a specialist. The main thing is to act consistently and not ignore the first signs of a malfunction in the cooling system.
Primary diagnostics and simple causes
Before disassembling the back wall or looking for a service center phone number, it is necessary to eliminate basic operating errors. Often the answer to the question “why the refrigerator does not work” lies in the little things that we overlook in a hurry. Careful inspection can save you time and money.
Check whether the refrigerator door fits tightly. If the rubber seal is dirty, deformed, or simply has crumbs stuck in it, the seal is compromised. Warm air from the room constantly flows inside, and the cooling system simply does not have time to cool it, creating the illusion of a breakdown. Also make sure that you do not put freshly cooked hot food inside - this could throw off the thermostat settings.
⚠️ Attention: If you notice that the door does not close tightly, do not try to slam it shut. This may damage the hinges or permanently deform the seal. Check that the refrigerator itself is installed evenly on the floor.
Another important point is the operating mode. If you have a model with the No Frostsystem, make sure that the Vacation or Eco function is not activated, which can turn off the cooling in the main chamber to save energy. Also check that the ventilation holes inside the chamber are not blocked by food. The air must circulate freely.
Problems with the No Frost defrosting system
In refrigerators with technology No Frost or Full No Frost the most common reason for the lack of cold in the upper compartment when the freezer is running is a malfunction of the defrost system. The essence of the problem is that a “coat of ice” builds up on the evaporator, which is usually hidden behind the rear panel. This ice blocks the operation of the fan, and cold air simply cannot enter the refrigerator compartment.
You can diagnose this problem by listening to the operation of the unit. If the fan is humming, but no air is blowing out of the holes, or you hear extraneous crackling of ice, the evaporator is most likely clogged. In this case, the compressor can work in enhanced mode, trying to increase the temperature, but physically cannot do this due to the ice jam. Defrosting in this case, this is the first and often the only necessary action.
After complete defrosting (at least a day!) the equipment can work in normal mode. However, if after a week the situation repeats, it means that one of the elements of the defrosting system has failed: the evaporator heating element, the thermostat (defroster) or the timer. In electronically controlled models, the defrost sensor may have burned out. Here you will already need replacement of partswhich only a master with a multimeter can do.
Faults of the compressor and start relay
The compressor is the “heart” of the refrigerator. If it does not work properly, all refrigerant circulation is disrupted. In situations where the freezer is freezing and the refrigerator is warm, a phenomenon called “working on one cylinder” often occurs. This is typical for dual-circuit systems or when the compression mechanism is damaged.
Pay attention to the sound of the motor. If it hums smoothly but weakly, or turns on for a few seconds, clicks and turns off, the problem may be in the start relay. This is a small part that supplies current to the motor windings. If it breaks down, the compressor cannot start fully, creating insufficient pressure in the system. Replacing the relay —the procedure is inexpensive and fast.
In more complex cases, an interturn short circuit of the windings or depletion of the life of the compressor itself may be observed. It can create pressure only on one circuit (the freezer), without coping with the second. Diagnostics of pressure in the system requires special equipment - a pressure gauge station.
Freon leak and clogged capillary tube
These two problems often go hand in hand in the list of reasons why the refrigerator has stopped freezing. Freon is a working fluid that transfers heat. If its quantity in the system decreases due to a microcrack in the circuit, the pressure drops. The refrigerant simply does not reach the evaporator of the refrigerator compartment, completely evaporating in the freezer. Hence the temperature difference.
Clogging of the capillary tube occurs less frequently, usually due to moisture in the system or oil breakdown products. The tube through which freon enters the evaporator becomes clogged with ice or oil. The circulation stops and the cold ceases to be produced in the required volume. Symptoms Leaks and blockages are similar, and only a professional can accurately distinguish one from the other.
| Symptom | Leak freon | Capillary clogged |
|---|---|---|
| Condenser temperature (rear grill) | Cold or slightly warm | Hot only at the beginning, then cold |
| Operation compressor | Works almost non-stop | Works with overheating, can be turned off by a thermal relay |
| External signs | Oily spots under the refrigerator | Absent |
⚠️ Attention: Independent refilling with freon is impossible without a vacuum pump and scales. An attempt to simply “add gas” through a puncture often leads to final breakdown of the compressor due to moisture or air entering the system.
Failures in electronics and temperature sensors
In modern models such as Liebherr, Bosch or LG, the electronic control module is responsible for the distribution of cold. It reads the temperature sensors in each chamber and gives a command to the compressor or dampers. If the sensor in the refrigerator compartment “lies” and shows that it is already -10°C, the module will turn off the cold supply, although in reality there may be +15°C.
The dampers (dampers) that regulate the air flow may also fail. If the damper is stuck in the closed position, cold air from the freezer simply does not enter the upper compartment. You can check this by disassembling the back panel inside the refrigeration chamber (after defrosting the unit!).
When you need to call a specialist
There is a clear line between do-it-yourself repairs and professional intervention. If you have completed a complete defrost, checked the seals and settings, but the situation has not changed, most likely a complex repair is required. Specialized tools The technician will be able to carry out an accurate diagnosis in 15 minutes.
A call to a specialist is required in the following cases:
- 🔧 You hear gurgling or hissing inside the case (a sign of a leak).
- 🔧 The compressor is hot, hums, but does not start or immediately clicks and stalls.
- 🔧 After defrosting, the refrigerator worked for a day and stopped freezing again.
- 🔧 Swelling or traces of corrosion are visible on the back wall inside the chamber.
Remember that timely repairs are cheaper than buying a new unit or replacing a compressor that burned out from overload. If the equipment is under warranty, any independent opening of the seals will lead to its loss.
Prevention and operating rules
To extend the life of your refrigerator and avoid situations where it stops freezing, it is important to follow simple rules. Do not load the chamber tightly with products “to the ceiling”; leave gaps at the back wall for air circulation. Regularly, at least once every six months, wash the seals and check their elasticity.
It is also important to keep the rear condenser grill clean. Dust and animal hair that stick to it impair heat transfer, causing the compressor to wear out. This is a direct road to overheating and breakdown. Regular cleaning The spaces around the refrigerator are the key to its longevity.
Is it possible to use the refrigerator if the freezer is working and it is warm in the main chamber?
Short-term - yes, if you put the food in the freezer or use it quickly. However, long-term operation in this mode is dangerous for the compressor, which works non-stop, trying to achieve the impossible. This can lead to its burning.
How much does it cost to repair if the refrigerator does not keep cold?
The cost depends on the breakdown. Replacing a sensor or relay is inexpensive. Refilling with freon and finding leaks will cost more. The exact price can only be given after diagnostics, since it consists of the cost of spare parts and the complexity of the work.
Why does the refrigerator take a long time to gain temperature after defrosting?
After a long defrosting (more than 12 hours), the system may require 4 to 8 hours to reach operating mode. At this time, do not open the doors frequently and do not load food, let the equipment stabilize.