The situation when you go to the refrigerator, and there is room temperature inside, can ruin anyone’s mood. It is especially alarming when the back grate or side walls of the unit are noticeably hot, creating the illusion of active operation, but the food begins to deteriorate. This is a classic sign of a violation of the thermal balance, which can indicate a whole range of malfunctions - from a banal blockage to a serious failure of the compressor.
Understanding the principles of your operation helps you quickly navigate the problem. When a motor runs non-stop, trying to reach set temperatures, it produces excess heat. However, if there is no cold, it means that the refrigerant is not circulating through the system properly or the heat exchange is impaired. In this article we will analyze in detail the main causes of such an anomaly and methods for eliminating them. refrigeration equipment helps to quickly navigate the problem. When a motor runs non-stop, trying to reach set temperatures, it produces excess heat. However, if there is no cold, it means that the refrigerant is not circulating through the system properly or the heat exchange is impaired. In this article we will analyze in detail the main causes of this anomaly and methods for eliminating them.
You should not panic ahead of time, but you cannot ignore the problem either. Leaving the engine idle for a long time can lead to complete combustion, which will significantly increase the cost of repairs. Let's figure out why your unit stopped freezing, and what you can do yourself.
The main signs of a malfunction of the cooling system
The first sign indicating that the refrigerator works, but does not freezeis the constant hum of the engine. In normal mode, the equipment operates cyclically: it turns on, cools the chamber to the desired degree and turns off. If the compressor hums non-stop, this is a sure sign that the system cannot close the thermostatic circuit due to lack of cold.
Pay attention to the heating pattern of the external elements. Depending on the model, the side walls, rear grille, or the space between the doors may become hot. If these zones are hot to the point where they are painful to touch, but there is heat inside, there is obvious overheating of the system. Often this is accompanied by the formation of ice in one corner or, conversely, complete dryness of the evaporator.
⚠️ Attention: If you smell burning or see sparking in the compressor area, immediately unplug the device. Further operation may lead to a fire.
It is also worth listening to the sounds that the unit makes. Gurgling, hissing, or the complete absence of the characteristic sound of flowing freon may indicate a refrigerant leak. A normally working refrigeration system emits a uniform low-frequency hum, interrupted by silence during periods of rest.
Problems with the compressor: motor diagnostics
The heart of any refrigerator is the compressor, and it is its incorrect operation most often leads to the described symptoms. If engine it hums but does not start, or starts for a few seconds and stalls with a click, the problem may lie in the start relay. This is a small part that provides an impulse to start the motor.
In more severe cases, the compressor itself may be faulty. An interturn short circuit of the winding leads to the fact that the motor consumes enormous current, heats up greatly, but does not develop the necessary pressure for freon circulation. In this case, the compressor housing becomes hot very quickly, sometimes within 5-10 minutes of operation.
Checking the compressor requires caution. It is necessary to check the resistance of the windings with a multimeter. If the device shows an open or short circuit, the part must be replaced. It is also worth inspecting the contacts for oxidation or burning, which is often found in older models. air pumping and skills in working with refrigerants. Without experience, it is better not to take risks. Indesit or Atlant.
Is it possible to replace the compressor yourself?
Theoretically, yes, but this requires a special tool for soldering copper pipes, a vacuum pump for pumping out air, and skills in working with refrigerants. Without experience it is better not to take risks.
Another reason may be jamming of the piston group inside the compressor due to oil burnout or moisture entering the system. In this case, the motor shaft simply cannot turn, although electricity is supplied to the windings, causing them to heat up greatly.
Freon leakage and clogged capillary tube
If the compressor runs smoothly, without strain, but there is no cold, and the condenser (grid at the back) is only warm at the beginning or half, most likely it has occurred refrigerant leak. Freon is a working fluid that transfers heat. Without it, the cooling process is physically impossible, although the motor will try to compensate for the lack of cold by constant operation.
Leaks often occur in places where tubes are soldered or in the foamed part of the body, where the metal corrodes over time. It is rarely possible to locate a leak visually; it usually requires the use of a leak detector or a soap solution if you have access to the connections. In modern models with one cooling circuit, a leak often leads to the fact that the freezer still holds cold, but the main chamber does not.
Another common problem is clogging of the capillary tube. An ice or mud clot could form in the system, which blocks the flow of freon. In this case, the compressor creates high pressure before the blockage (hence the heating), but the refrigerant does not flow further. A characteristic sign is that the filter drier may be covered with frost or, conversely, be hot.
To eliminate these problems you need:
- 🔍 Conduct a visual inspection of all accessible tubes for oil stains (freon carries oil away from itself).
- ❄️ Check the uniform heating of the condenser over the entire area.
- 🔧 Call a technician to find leaks and refill the system.
⚠️ Attention: Freon is odorless and colorless, but some of its types can emit toxic substances when in contact with an open flame. Do not try to solder the pipes without first removing the refrigerant from the system.
Malfunctions of the thermostat and electronics
Electronics controls all processes in modern refrigerators. If thermostat or temperature sensors are faulty, they may send incorrect signals to the control module. For example, the sensor may “think” that it is already -20 degrees in the chamber and not give a command to turn on the compressor, although in reality it is +15. Or vice versa - do not turn off the motor when the goal is achieved.
In models with the system No Frost the defrost sensor plays an important role. If it is faulty, the evaporator may become overgrown with a “fur coat” that will block the cold air supply channels. The fan will drive air, but it will not be able to pass through the ice monolith to the food. As a result, the motor runs, the capacitor heats up, and the chambers are warm.
Checking a mechanical type thermostat is simple: you need to close its contacts. If after this procedure the compressor starts, it means the regulator is faulty and requires replacement. In electronic systems, you will need to diagnose the control board, which could have failed due to power surges.
Diagnostic table by symptoms
To make it easier for you to navigate the variety of symptoms, we have compiled a summary table. It will help narrow down the troubleshooting before calling a specialist.
| Symptom | Probable cause | Difficulty of repair | Required actions |
|---|---|---|---|
| The compressor is hot, humming, does not start | The starting relay is faulty or the motor is stuck | Medium | Replacing the relay or compressor |
| The motor runs constantly, the capacitor is cold | Leakage freon | High | Looking for leaks, soldering, refilling |
| Humming, warm inside, ice frozen in one place | Clogged capillary system | High | Purge the system, replace the filter |
| The refrigerator does not turn on, the indicators are on | Failure of the control board | High | Module repair or replacement |
This table is for informational purposes only. An accurate diagnosis can only be made by a specialist with the appropriate equipment. Self-diagnosis is good for understanding the scale of the problem, but is not always sufficient for repair.
Operation rules and prevention
Often users themselves create the conditions under which the refrigerator stops freezing. For example, installing the unit close to a wall or in a niche without gaps disrupts air circulation. The condenser does not have time to cool down, the cooling efficiency drops, and the motor wears out.
Loading the refrigerator with hot foods is another common mistake. The evaporator is instantly covered with a thick layer of ice, thermal conductivity is disrupted, and the equipment loses its ability to freeze. Also, do not forget about regular defrosting if your model is not equipped with a system No Frost.
☑️ Prevention of proper operation
Monitor the condition of the sealing rubber on the doors. If it becomes dry or dirty, warm air from the room constantly enters the chamber. The compressor tries to compensate for heat loss by working without interruption, which leads to its overheating and cooling stops.
When you need to call a technician
There are a number of situations when independent repair is not possible only useless, but also dangerous. If you have identified a freon leak, you will not be able to cope on your own. Special equipment is required to pump out air, evacuate the system and accurately dose the refrigerant. In addition, working with gas requires a license.
Replacing a compressor is also a complex process that requires soldering copper tubes with an open flame. Inept actions can lead to damage to other components or even fire of insulation. If after defrosting and checking the electrical system the problem does not disappear, it is better not to experiment.
⚠️ Attention: By opening the sealed circuit yourself, you lose the product warranty (if it is still valid) and risk damaging expensive components, which will ultimately cost more than calling a professional.
A qualified technician will conduct a full diagnosis, will check the tightness of the system under pressure and provide a guarantee for the work performed. This will save your nerves and money in the long run.
Why does the refrigerator freeze but does not turn off?
Most often this is due to a freon leak or a malfunction of the thermostat. The system cannot reach the required temperature, so it does not receive a signal to stop. Also, the reason may be a violation of the door seal.
Is it possible to use a refrigerator if it does not freeze?
For a short time - yes, but not for long. Constantly running the motor in overload mode will cause it to burn out. It is better to turn off the device and eliminate the cause of the breakdown, so as not to buy new equipment.
How long should the compressor cool down after turning off?
Usually the rest cycle lasts from 15 to 40 minutes, depending on the model and settings. If there is no pause at all, or it lasts seconds, this is a sign of a malfunction.
What to do if after defrosting the refrigerator still does not freeze?
If complete defrosting (at least 24 hours with the doors open) did not help, then the problem is technical: leakage, blockage or breakdown of the electronics. Diagnostics by a specialist is necessary.