The situation when the refrigerator has stopped freezingalways takes you by surprise and creates a real threat of product damage. You open the door hoping to see frost, and inside there is a warm chamber and melting food. This is not just discomfort, it is a signal that there is a problem in the refrigerant circulation or temperature control system. Often, equipment owners begin to panic and immediately call a technician, but in many cases the problem can be diagnosed independently.
Before disassembling the unit, it is important to understand the scale of the disaster: is nothing working at all, or is the freezer functioning, but is it warm in the refrigerator compartment? The answer to this question narrows the scope of troubleshooting. In this article we will analyze in detail the main reasons why the refrigerator does not cool, and what steps need to be taken to restore its functionality without extra costs.
Sometimes the problem lies not in a breakdown, but in improper operation or external factors. Compressor malfunction or freon leak - these are serious diagnoses that require the intervention of professionals. However, before diagnosing them, it is necessary to eliminate simple errors that are often made during installation or maintenance of equipment.
Primary diagnosis: checking obvious causes
The very first thing to do if The refrigerator is not freezing is to check basic things. It often happens that the equipment is working properly, but its operating conditions are violated. Make sure that the plug is firmly inserted into the outlet and that the power supply voltage is stable. If the indicators on the panel are on, but there is no cold, proceed to the next step.
Carefully inspect the location of the refrigerator. If it stands close to the wall or in a niche without gaps, air circulation is disrupted. Compressor it overheats and goes into protective mode, stopping pumping freon. Also check that the ventilation holes inside the chambers are not blocked by food. This blocks the distribution of cold air.
⚠️ Attention: Never try to force start the compressor if it is hot. Allow the equipment to cool for at least 2-3 hours with it turned off.
Check the temperature settings. Perhaps one of the household members accidentally changed the settings or activated the “Vacation” or “Super Freeze” mode (which sometimes does not work correctly when turned on for a long time). In modern models with electronic control controller failure can cause sensors to show incorrect data.
Problems with the seal and tightness of the chamber
One of the most common reasons why the refrigerator does not freeze wellis a violation of the chamber's tightness. If warm air from the room constantly flows inside, the cooling system does not have time to cool it down. The compressor works non-stop, trying to compensate for the heat flow, which leads to its rapid wear and excessive consumption of electricity.
The main element of tightness is rubber seal on the door. Over time, rubber dries out, cracks or becomes deformed. A gap is formed in places of damage. Check the seal around the entire perimeter: there should be no tears, sticky residue or mold. Dirt prevents the door from fitting tightly.
☑️ Checking the door tightness
There is a simple test to check the tightness. Take a sheet of paper, open the door slightly, place the sheet between the body and the seal and slam the door. Try to pull out the sheet. If it is pulled out easily and without resistance - The seal does not fit.. The door is not airtight at this point. Carry out this check along the entire perimeter.
What to do if the seal is deformed?
If the rubber has simply lost its elasticity, you can try softening it with boiling water or a hairdryer (carefully!), and then press the door with a weight overnight. If there are breaks, only replacement will help.
Malfunctions of the defrosting system (No Frost)
In refrigerators with a system No Frost a frequent reason for the lack of cold is a failure in the defrosting system. Ice builds up on the evaporator, which is hidden behind the back wall of the chamber. The fan stops driving air through the “ice coat”, and the cold stops flowing into the chamber, although the compressor may hum.
Three main elements are responsible for the defrosting process: Defrost heating element, defrost thermostat (or sensor) and timer (or electronic module). If the heating element burns out, the ice does not melt. If the sensor is stuck, it does not give a command to turn on the heating. As a result, the evaporator turns into a block of ice.
You can diagnose this by completely defrosting the refrigerator. Leave it turned off with the doors open for 24 hours. If after turning it on it works normally, but after 1-2 weeks the problem returns, it means that the defrosting system is not functioning. It is necessary to test the elements with a multimeter.
Freon leak and problems with the compressor
If after defrosting the refrigerator turned on, worked for a couple of hours and stopped freezing again, or the compressor starts for a couple of seconds and turns off - there is a high probability of a motor malfunction. Freon is the “blood” of the refrigerator; without it, heat exchange is impossible. refrigerant leaks or motor malfunction. Freon is the “blood” of the refrigerator; without it, heat exchange is impossible.
Leaks often occur in the foamed part of the body or in places where pipes are soldered. It is difficult to see them visually. An indirect sign - hot condenser (the grille at the back) is only partially or it is cold, and the tubes near the compressor do not have a characteristic temperature difference. Also, only a piece of frost may appear on the evaporator in the corner.
| Symptom | Probable cause | Nature of failure |
|---|---|---|
| The compressor hums, but does not start | Start relay or compressor wedge | Electrical/Mechanical |
| The refrigerator is silent, there is no light | Open circuit or jump voltage | Electrical |
| Works, but does not freeze, no frost | Freon leak | Tightness |
| Freezes slightly, the “fur coat” is freezing | Malfunction of the defrost system | Electronics/heating element |
If the problem is in the compressor, the situation is serious. The motor-compressor is a complex unit, and replacing it requires evacuation of the system and charging with freon. It is impossible to perform this operation independently without equipment. In the event of a leak in the foamed part of the housing, repair is often not economically feasible.
Failure of the thermostat and sensors
The thermostat (thermostat) is the “brain” that decides when to turn the compressor on and off. In older models, this is a mechanical “twist” with a capillary tube. The new ones are electronic temperature sensors. If the thermostat is faulty, it may “think” that the chamber is already cold and not give a command to start.
In mechanical thermostats, the capillary tube itself or the contacts inside the housing often break. You can check it by closing the contacts directly (for diagnostics). If after closing the contacts (with the refrigerator disconnected from the network!) the compressor starts, then the thermostat is to blame. But be careful: this is dangerous for inexperienced users.
⚠️ Attention: Replacing a thermostat requires precise selection of the model. Installing an unsuitable regulator will result in the refrigerator either not turning off or not turning on at all.
In electronically controlled systems (Smart Cooling, Multi Flow), air sensors are responsible for the temperature. They may oxidize or give incorrect readings. Often, when a sensor breaks down, an error code lights up on the display. The decoding of the code should be found in the instructions for the specific model, for example LG, Samsung or Bosch.
Clogged capillary pipe
Another technical reason why The refrigerator does not freeze is a clogged capillary tube. Inside the thin copper tube through which freon circulates, plugs of paraffin deposits or oil oxidation products may form. This disrupts the circulation of the refrigerant.
The symptoms are similar to a leak: the compressor works, the condenser is hot, but there is no cold. Sometimes you can hear gurgling or whistling sounds in the area of the filter drier. Cleaning requires special equipment: nitrogen, a vacuum pump and soldering tools.
Often the blockage is accompanied by overheating of the compressor. The motor is trying to push freon through the plug and is overloaded. If the problem is not corrected in time, the compressor will burn out. Repair consists of purging the system, replacing the filter-drier and refilling with new freon.
When you need to call a specialist
Despite the desire to save money, there are situations when independent repair is impossible or dangerous. If you have checked the seal, defrosted the unit, made sure there is voltage, but the refrigerator does not cool it’s time to call a specialist. Especially if soldering of pipes or replacement of the compressor is required.
A technician is needed to search for micro-leaks of freon using a leak detector. Also, a professional will be able to accurately diagnose the condition of electronics using test modes that are not available to the user. An attempt at independent soldering can lead to complete failure of the equipment.
Is it worth repairing an old refrigerator?
Repair is advisable if the cost of spare parts and labor does not exceed 50-60% of the cost of a new similar device. If the refrigerator is more than 10-12 years old, it is often easier to buy a new one.
Remember that tampering with a sealed circuit without a license and equipment is prohibited by safety rules. Freon can be flammable or toxic under certain conditions. Entrust complex technical operations to certified engineers.
Frequently asked questions (FAQ)
Why does the refrigerator freeze but does not turn off?
Most often this is a sign of a freon leak (the compressor is trying to compensate for the lack of cold) or a door seal is broken. It is also possible for the thermostat contacts to stick.
Is it possible to use a refrigerator if it does not freeze?
For a short time - yes, for ventilation. Idle operation or constant attempt to gain temperature will kill the compressor. It is better to turn off the device until the reasons are determined.
How long should defrosting last?
It takes at least 24 hours for the ice in the No Frost system to completely melt and moisture to evaporate from hard-to-reach places. It is not recommended to speed up the process with a hair dryer or boiling water - you can damage the plastic.
Why is the back wall of the refrigerator covered with ice?
This may be the norm for a drip system (periodic freezing and dripping). But if the ice does not melt and turns into a fur coat, the problem is in the thermostat or defrost system.