The situation when refrigerator stops freezing always takes you by surprise, threatening food spoilage. If you notice that the ice in the freezer is melting and food is becoming soft, this is a signal of a serious problem in the cooling system. The first step is to check whether the door is tightly closed and whether the thermostat setting has accidentally been lost, since sometimes the problem is solved in seconds.
However, if the adjustment does not help, and it is still warm inside, it means that a technical failure has occurred in the operation of the unit. Modern models they may beep or flash indicator, warning of rising temperatures. Ignoring these symptoms will lead to complete defrosting of the contents and possible failure of expensive components.
It is important to understand that it takes time to restore the cold. After defrosting or a power outage, the unit may take from 2 to 12 hours to return to operating mode. If more than a day has passed, and temperature does not fall below -5°C, it is necessary to proceed with detailed diagnostics.
Main reasons for the lack of cold
There are several key factors why Refrigerator stops performing its function. Most often, the problem lies in a violation of the tightness of the circuit or failure of electrical components. Compressor It may work, but does not create sufficient pressure, or the refrigerant has simply leaked out through microcracks.
⚠️ Attention: If you hear a hissing sound when the unit is operating or see oily spots on the floor, this is a sure sign of a freon leak. You cannot refuel the system yourself without equipment.
Another common reason is the formation of a “snow coat” on the evaporator, which is not visible from the outside. This blocks air circulation. Also, the temperature sensor or thermostat often fails, which is why the “brain” of the refrigerator does not receive a signal to turn on the compressor.
Here is a list of the main culprits of the malfunction:
- 🧊 Leakage of refrigerant (freon) from the system.
- ⚡ Failure of the compressor or starter relay.
- 🌡️ Malfunction of the thermostat or defrost sensor.
- ❄️ Clogged capillary tube or No Frost system.
Problems with the compressor and start relay
Compressor - this is the heart of the refrigeration unit, ensuring gas circulation throughout the system. If it hums but does not start, or clicks and turns off immediately, there is most likely a problem with the start relay or the motor windings. In some cases, the motor may operate silently, but not develop the required power.
For diagnostics, you need to listen to the sounds coming from the rear panel. If a characteristic click is heard, followed by silence, this indicates an attempt to start and the protection has tripped. Start relay - an inexpensive part that can often be replaced yourself if you have basic electrical skills.
The table below will help classify the symptoms of a breakdown compressor:
| Symptom | Probable cause | Difficulty of repair |
|---|---|---|
| Buzzes, but does not start | Stuck piston group | High (replacement) |
| Clicks and turns off | Faulty starting relay | Low (replacement relay) |
| Works constantly | Leakage freon or blockage | Medium (search for leaks) |
| Gets very hot | Wear or overload | High |
If the compressor is hot to the touch (more 60-70°C) and does not turn off, this may indicate an interturn short circuit. In such a situation, further operation poses a fire hazard. It is urgent to disconnect the device from the network.
☑️ Compressor diagnostics
Malfunctions of the defrost system and sensors
In models with the system No Frost the proper functioning of the defrost system is critically important. If the defrost heating element, timer or defrost sensor fails, ice builds up on the evaporator. The air stops circulating and the cold does not enter the chamber, although the compressor can work without interruption.
Often owners do not even suspect the presence of ice inside, since it is hidden behind the plastic panel of the rear wall. Symptoms appear gradually: at first the freezer freezes worse, then stops completely. Defrost sensor should record the temperature of the evaporator and give a command to turn on the heater.
⚠️ Attention: If you defrosted the refrigerator and it started working normally, but a week later the situation repeated itself - the problem is guaranteed to be in the defrost system (heating element, sensor or timer).
To check the elements of the defrost system, you will need a multimeter. It is necessary to “ring” the heating element for a break and check the sensor for changes in resistance when the temperature changes. In Atlant refrigerators or Indesit these elements are often the first to fail.
How to check the defrost heating element?
To check you need to get to the evaporator (remove the back panel in the freezer). Disconnect the wires from the heating element and measure the resistance. It should be within 200-400 Ohms. If the device shows “1” or infinity, the heating element has burned out and requires replacement.
Refrigerant leak and system blockage
Leak freon is one of the most common reasons why it is warm in the freezer. Gas can escape through microcracks in the foamed circuit, through solder joints, or through corrosion of the evaporator tubes. Unlike water, gas does not leave puddles, so it is difficult to visually detect a leak.
Signs of a leak are the absence of cold when the compressor is running. The condenser tubes (grill at the back) may be only partially cold or warm. Also, sometimes (not always) traces of oil can be seen at the leak site, since freon circulates along with compressor oil.
Clogged capillary tube is a less common, but possible problem. It occurs due to moisture or oil breakdown products entering the system. In this case, the compressor operates with overload, and the pressure in the system is not enough for normal boiling of the refrigerant.
- 🔍 Visual inspection of the tubes for oil stains.
- 👂 Listening to the nature of the compressor operation (intermittent cycle).
- ❄️ Check uniform cooling of the evaporator (the whole thing should be cold).
- 🛠️ You need to call a technician with a leak detector and a vacuum pump.
Restoring tightness and charging with freon is a complex process that requires specialized equipment. It is almost impossible to eliminate a leak in the foamed part of the housing on your own.
Problems with the seal and chamber tightness
Sometimes the reason lies not in the “insides”, but in the banal leakage of the door. Sealing rubber over time it dries out, cracks, or simply becomes dirty and no longer fits tightly to the body. Warm air constantly enters the chamber through the cracks, which the cooling system does not have time to cool.
You can check the tightness with a simple test with a sheet of paper. Clamp the sheet with the door around the perimeter. If it is pulled out easily and without resistance, the fit is broken. It is also worth inspecting the door hinges: if they are loose, the door warps and does not close tightly.
To restore the tightness, you can try:
- Wash and degrease the rubber band thoroughly.
- Warm the seal with a hairdryer (carefully!) so that it straightened out.
- Replace the rubber band with a new original one.
- Adjust the position of the door.
It is important to note that in some models, for example Liebherr or Bosch, the seals have a complex magnetic structure, and their replacement requires certain skills.
Is it possible to restore an old elastic band?
You can temporarily restore elasticity by wiping the elastic band with silicone oil or glycerin. However, if there are physical breaks or severe deformation, only a complete replacement of the part will help.
Electronic control board and thermostats
In modern two-chamber refrigerators, the entire process is controlled electronic module. If it is “buggy”, it may not send a command to turn on the compressor or fan, even if the sensors are working properly. Power surges in the network are the main cause of failure of electronics.
Mechanical thermostats (in older models) also tend to break. If the thermostat bellows has lost its seal, the contacts simply will not close. As a result, the compressor does not turn on at all. You can check this by closing the thermostat contacts directly (for a short time!).
⚠️ Attention: Work on the electrical part only when the device is completely disconnected from the network! Residual voltage in capacitors can be dangerous.
Diagnostics of the control board requires knowledge in electronics. You can often visually notice burnt tracks, swollen capacitors or traces of soot. Repairing the board is usually cheaper than replacing the entire module, but requires qualifications.
If the refrigerator stops freezing after a thunderstorm or a power surge, the probability of electronics failure is 90%. In such cases, independent repair is only possible if you have a diagram and experience.
☑️ Electrical check
When you need to call a technician
Not all faults can be fixed with your own hands. If the diagnosis shows a freon leak, a clogged capillary system, or a compressor malfunction, professional intervention will be required. A technician is also needed if a foamed evaporator needs to be replaced or complex electronic repairs are required.
A call to a specialist is justified when:
- 🛠️ The system needs to be evacuated and refilled with freon.
- 🔥 There is a burning smell or obvious traces of a short short circuit.
- 🔊 The compressor makes unnatural sounds (knocking, clanging).
- 📉 The cold has disappeared completely and does not return after defrosting.
An attempt to independently repair complex equipment without experience can lead to higher repair costs in the future. The technician will bring with him the necessary equipment: pressure gauges, leak detector, burner and spare parts.
It is worth remembering that replacement compressor an evaporator in the foamed part is often not economically feasible for old refrigerators, and it is easier to consider purchasing a new unit.
Why doesn’t the refrigerator freeze after defrosting?
If after complete defrosting (more than 24 hours) the cold does not appear, then the problem is not in the ice plug. Most likely, there was a freon leak or the compressor burned out. The thermostat could also have failed, which “does not see” that it is warm in the chamber.
Is it possible to use a refrigerator if it does not freeze?
You can use it as a cabinet for storing food at room temperature, but not for long. However, if the compressor hums and does not turn off, it will quickly burn out from overheating. It is better to turn off the device before the technician arrives.
How long does it take the refrigerator to gain temperature after turning it on?
Usually the process takes from 2 to 6 hours, depending on the model and chamber volume. In super freeze mode or when fully loaded with warm food, the time can increase to 12 hours. If the temperature has not stabilized within a day, look for a malfunction.
What to do if the freezer is freezing, but the refrigerator is not?
This is a classic sign of a malfunction of the defrost system (the air supply channel is frozen) or a freon leak (there is only enough gas for one circuit). It is also possible that the air flow control damper gets stuck.