The refrigerator has stopped freezing, and the ice is melting in the freezer? Do not rush to call a specialist - in 60% of cases the problem can be fixed on your own. The causes of the malfunction vary from trivial disabling the freezing mode to serious compressor breakdowns or refrigerant leaks. In this article we will analyze all possible scenarios: from diagnostics to step-by-step repair.
The first thing to do is check the obvious points: is the refrigerator connected to the network, is the electricity in the house turned off, is the outlet overloaded. If everything is fine with the food, but the freezer is not working, and the temperature in the main compartment is above normal, proceed to detailed diagnostics. We have compiled a checklist of 12 reasons why the refrigerator may not freeze, and we will tell you how to identify them without special tools.
Modern refrigerators are equipped with a self-diagnosis system, but it does not always work correctly. For example, in models Samsung No Frost or LG Inverter an error may be displayed on the display, but its interpretation is not always clear to the user. If your unit is not equipped with a screen, focus on indirect signs: whether the fan is working, whether you can hear the noise of the compressor, how hot the back wall is.
It is important to distinguish complete failure of the freezer from a partial loss of performance. In the first case, the food is completely defrosted, in the second, the temperature simply does not correspond to the set temperature (for example, instead of −18°C it stays at −5°C). This will help narrow down the range of possible faults.
1. Problems with power supply and settings
Start by checking basic things that are often overlooked. No power supply is the most common reason why the refrigerator does not freeze. Make sure that:
- 🔌 The plug is firmly inserted into the socket (sometimes the contacts oxidize).
- 🔋 There are no power outages (check other appliances in the house).
- ⚡ The socket is working (connect another device to it, for example, a hair dryer).
- 🔄 The circuit breaker on the panel did not work (especially important after power surges).
If the power supply is normal, check temperature settings. In some models (for example Indesit or Atlant) the "Vacation" or "Eco" modes automatically turn off the freezer or reduce its power. Take a look at the instructions - you may have accidentally activated one of these functions through the control panel.
Another nuance - network overload. If the refrigerator is connected through an extension cord or tee along with other powerful appliances (microwave, electric kettle), the voltage may be insufficient for normal operation of the compressor. In this case, the unit will hum, but not freeze.
2. Malfunction of the thermostat or temperature sensor
The thermostat (or thermostat) is the “brain” of the refrigerator, which controls turning the compressor on and off. If it breaks, the compressor will either not start at all, or will work continuously, but without the desired effect. Signs of a broken thermostat:
- ❄️ The compressor does not turn on, although there is power.
- 🔄 The refrigerator works without stopping, but does not freezing.
- 🌡️ The temperature in the chambers does not correspond to the set temperature (for example, instead of 5°C it shows 15°C).
To check the thermostat, follow these steps:
- Disconnect the refrigerator from the power supply.
- Remove the protective cover from the thermostat (usually it is located next to the temperature control knob).
- Ring the contacts with a tester in resistance mode. At room temperature, the resistance should be close to zero.
- If there is no resistance, the thermostat is faulty and requires replacement.
In models with electronic control (for example, Bosch KGE39XW25R or Liebherr CNef 4815) instead of a mechanical thermostat, temperature sensorsare used. Their failure is diagnosed by errors on the display (for example, code E1 or F2). For accurate diagnostics, you will need a multimeter and a refrigerator circuit.
How to fool the thermostat for a test?
Unplug the refrigerator, find two wires going to the thermostat, and short them together. If the compressor starts working, the thermostat is faulty.
3. Freon leak: signs and what to do
A refrigerant (freon) leak is one of the most serious breakdowns that requires professional repair. Freon circulates in a closed circuit, and if a crack appears somewhere, the gas gradually comes out, and the refrigerator stops freezing. How to recognize a leak:
- 🛠️ The compressor works, but does not turn off (trying to “catch up” the cold).
- ❄️ The freezer is covered with ice unevenly or does not freeze at all.
- 🔥 The condenser (grid on the rear wall) does not heat up.
- 💨 There may be an oily trace at the leak site (freon comes out along with the oil).
It is impossible to eliminate the leak on your own - special equipment is required to evacuate the system and refill freon. However, you can check the most vulnerable places:
- Inspect places where pipes are soldered (most often leakage occurs in locking connections).
- Check evaporator in the freezer chamber - if it is covered with rust, there are probably microcracks there.
- Pay attention to oil under the refrigerator - its presence indirectly indicates a leak.
In refrigerators with a system No Frost a freon leak is often accompanied by by icing the evaporator (it is not visible without disassembling, but you can hear — the fan will hum loudly, trying to break through the ice). In this case, defrosting for 24 hours and diagnostics by a specialist is required.
⚠️ Attention: Do not try to charge freon yourself! The refrigerant is toxic, and improper charging can cause the compressor to explode.
4. Compressor failure: how to check and what to do
The compressor is the “heart” of the refrigerator, which pumps freon through the system. If it is broken, the refrigerator will not freeze at all. Signs of a compressor malfunction:
- 🔇 The refrigerator does not make any sounds (no buzzing).
- 🔥 The compressor housing is excessively hot (more than 80°C).
- 💥 When turned on, clicks are heard, but the motor does not start.
- 🛑 The compressor runs for 5-10 seconds and turns off (protection is triggered).
To diagnose the compressor, follow these steps:
☑️ Check compressor
Normal indicators of compressor winding resistance:
| Winding | Resistance (Ohm) | Note |
|---|---|---|
| Working (R) | 15–40 Ohm | Depends on the compressor model |
| Starting (S) | 20–50 Ohm | Must be higher than operating |
| Between R and S | Sum of R+S (for example, 30+25=55 Ohm) | If the resistance is 0 or ∞ - break |
| Case → any winding | ∞ (infinity) | If there is resistance, there is a breakdown on the housing |
If the compressor is faulty, it can be replaced, but this is an expensive repair (from 5,000 to 15,000 rubles depending on the model). For refrigerators older than 10 years, it is more advisable to consider purchasing a new unit.
⚠️ Attention: Compressors in inverter refrigerators (for example Samsung RB37J5240SA) are sensitive to power surges. If you have frequent power outages, install a voltage stabilizer.
5. Clogged capillary tube or filter drier
The capillary tube is a thin channel through which freon enters the evaporator. Over time, it can become clogged with compressor wear products, moisture or oil deposits. Symptoms of a blockage:
- ❄️ The freezer is working poorly, and the main compartment is not cooling.
- 🔥 The compressor is hot, but not turns off.
- 💧 Condensation on the back wall of the refrigerator.
A clogged filter-drier (it is located in front of the capillary tube) leads to the same consequences. You can diagnose the problem by temperature difference:
- If the tube before the filter is hot and after it is cold, it means freon is not passing through.
- If both parts of the tube are equally warm, the problem is in the compressor or leak.
The blockage can only be eliminated by purging the system with nitrogen or replacing the capillary tube. This is a job for a professional, as it requires:
- Pump out the old freon.
- Clean or replace the tube.
- Fill in a new portion of refrigerant.
6. Fan failure in No Frost systems
In refrigerators with a system No Frost the fan is responsible for circulating cold air. If it breaks, the freezer may continue to operate, but the main compartment will not cool. Signs of a faulty fan:
- 🌀 There is no air flow from the vents.
- 🔇 The refrigerator has become quieter (no characteristic fan noise).
- ❄️ Ice forms on the back wall of the freezer (the fan does not blow through the evaporator).
To check the fan:
- Unplug the refrigerator.
- Remove the back panel in the freezer (usually it is attached to latches).
- Try to turn the fan blades by hand - if they do not rotate, then the problem is in the motor or bearings.
- Test the fan winding with a tester (resistance should be 200–500 Ohms).
If the fan does not work, it can be replaced on your own. The cost of a new part is from 1,500 to 4,000 rubles, depending on the model. In refrigerators LG and Samsung fans often fail due to icing, so after replacement it is recommended to carry out a complete defrost (at least 24 hours).
7. Problems with the electronic control unit
In modern refrigerators, the electronic control module (ECU) is responsible for all processes. If it fails, the refrigerator may behave unpredictably:
- 📛 Errors appear on the display (for example,
Er IForE3). - 🔄 The compressor turns on and immediately turns off.
- 🌡️ The temperature in the chambers does not correspond to the set temperature.
- 🔇 The refrigerator does not respond to button presses.
The most vulnerable models are Bosch, Siemens i Gorenje s touch control. Problems with the ECU often occur after power surges or short circuits. For diagnostics:
- Turn off the refrigerator for 10-15 minutes, then turn it on again (sometimes resetting the settings helps).
- Check the fuses on the board (they may burn out).
- Inspect the board. for the presence of blackened or swollen elements.
If the control unit is faulty, it can be reflashed or replaced. The cost of repair is from 3,000 to 8,000 rubles. In some cases, replacing the capacitors on the board helps (this is cheaper than buying a new module).
⚠️ Attention: Do not try to repair the electronic unit without experience! Improper soldering can lead to a short circuit and fire.
8. The freezer door does not close tightly
If the freezer door does not close tightly, warm air gets inside and the refrigerator cannot maintain the desired temperature. Causes loose closure:
- 🧲 Wear or contamination of the sealing rubber.
- 🔧 Warping of the door due to loose hinges.
- 🧊 Ice on the seal (prevents a tight fit).
- 📦 Overloaded shelves (the door does not close all the way).
To check the tightness:
- Close the door and try to insert a sheet of paper between it and the body.
- If the sheet is easily pulled out, there is a seal is faulty.
- Check the rubber band for cracks or deformations.
To restore the tightness:
- 🧼 Wipe the seal with warm water and soap (sometimes it sticks due to grease).
- 🔥 Warm up the elastic band with a hairdryer (it can become deformed in the cold).
- 🔧 Tighten the door hinges (if it is sagging).
- 🛠️ Replace the seal (cost - from 1,000 to 3,000 rubles).
In refrigerators with magnetic seal (for example, Liebherr), the magnetic field weakens over time. In this case, only replacing the rubber will help.
FAQ: Frequently asked questions about a non-working freezer
The refrigerator hums, but does not freeze - what is the reason?
Most likely there is a problem in freon leakage or clogged capillary tube. The compressor is running, but the cold does not enter the chambers. Also check if the starting capacitor is burnt out (it is responsible for starting the motor).
The freezer is working, but the refrigerator is not - what to do?
In refrigerators with one compressor this can be caused by:
- Clogged capillary tube (freon does not reach the main one compartment).
- Fan failure (in No Frost systems).
- Failure of the damper that regulates the air flow.
In models with two compressors (for example, Atlant MHM 2808) the problem may be in a separate cooling circuit refrigeration chamber.
The refrigerator stopped freezing after the power was turned off. What broke?
Most likely it burned out. starting relay or failed electronic control unit due to a power surge. Check whether the compressor turns on (if not, the problem is in the relay; if it turns on and turns off immediately, it’s in the ECU).
There is no heat on the back wall of the refrigerator - is this normal?
No, this is not normal. If the condenser (grid on the back wall) is cold, this means that:
- The compressor is not working (check the power supply and thermostat).
- Happened freon leak (gas does not circulate, so the condenser does not heat up).
- The capillary tube is clogged (freon does not enter the condenser).
In a working refrigerator, the condenser should be warm (40–60°C).
Is it possible to fill the refrigerator with freon yourself?
Technically it is possible, but highly not recommendedFor this you need:
- Special equipment (vacuum pump, pressure gauges, freon cylinder).
- Knowledge of the exact type of refrigerant (R134a, R600a, R12, etc.).
- Experience in soldering copper pipes (if filled incorrectly, the compressor can be damaged).
An error during refueling can lead to compressor explosion or a leak of toxic gas. It is better to entrust this to professionals.