The situation when the refrigerator has stopped freezingtakes every home cook by surprise. Food spoils in the chamber, there is water on the shelves, and the temperature inside is close to room temperature. This is not just a household inconvenience, but a signal of a serious malfunction in the cooling system, which requires immediate intervention.
Before calling a technician, it is worth carrying out an initial diagnosis, since in many cases cause of failure the problem lies in simple things that you can fix yourself. However, ignoring the symptoms can lead to the failure of expensive components, such as a compressor or an electronic control module.
In this article we will analyze in detail why refrigerator it freezes poorly or has stopped cooling altogether, and we will draw up a step-by-step action plan to restore its functionality.
⚠️ Attention: If you smell burning or see sparking in the area of the compressor, immediately disconnect the appliance from the power supply and do not try to turn it on again until a specialist arrives.
Primary diagnosis: checking simple causes
Often, equipment owners begin to panic ahead of time, without checking basic things. If the refrigerator does not freeze, but the light is on and the noise of the motor is heard, the problem may lie in improper operation or simple carelessness.
The first thing to do is check the tightness of the door. The rubber seal could have worn out, become dirty, or simply not closed due to a foreign object. Warm air enters through the gap formed, and the unit does not have time to cool it.
It is also worth paying attention to the position of the temperature regulator. Someone in the household could accidentally move the wheel to minimum or switch the device to defrost mode. In models with electronic control, the operating mode could be lost after a power surge.
Another common reason is the chamber being overloaded with food or, conversely, running empty refrigerator. Heat transfer is violated if the products lie close to the back wall or block the air ducts. In an empty chamber, the cold simply has nothing to linger on, and it quickly evaporates when the door is opened.
Problems with the thermostat and sensors
If everything is in order with the door and settings, but The refrigerator does not gain coldthe culprit is often becomes a thermostat (thermostat) or air sensor. These elements are responsible for turning the compressor on and off at the right time.
In older models with mechanical control, a capillary thermostat is used. Its tube is attached to the evaporator and reacts to temperature changes. If the thermostat is out of order, the compressor may either not turn on at all, or work without stopping, causing food problems or, conversely, not creating cold. freezing products or, conversely, without creating cold.
In modern units with a system, electronic sensors monitor the temperature. Their breakdown leads to the fact that the “brains” of the refrigerator receive incorrect data and do not give the command to start cooling. Replacing the sensor is a simple procedure, but requires disassembling the internal panel. No Frost The temperature is monitored by electronic sensors. Their breakdown leads to the fact that the “brains” of the refrigerator receive incorrect data and do not give the command to start cooling. Replacing the sensor is a simple procedure, but requires disassembling the internal panel.
Symptoms of a malfunctioning thermostat are often similar to other failures, so accurate diagnosis is important. If you hear clicks, but the motor does not start, or, conversely, it hums continuously, but there is no cold, you should check this unit.
Faults of the compressor and start relay
The heart of any refrigerator is compressor. It is he who pumps the refrigerant through the system. If the engine does not start, hums but does not start, or operates with strong vibration and knocking, the problem most likely lies here.
Often the compressor itself is working, but cannot start due to a faulty start relay. This small device gives the starting impulse to the motor. If the relay is stuck or burnt out, you will hear a characteristic click, followed by a buzzing sound and shutting down after a few seconds. Replacing a relay is one of the simplest and cheapest procedures in refrigerator repair.
A more serious situation is an interturn short circuit of the compressor windings or its mechanical wear. In this case, the unit may become very hot, consume a lot of electricity, but not create the necessary pressure in the system. Repairing such a motor is not economically feasible; a complete replacement is required.
☑️ Compressor diagnostics
⚠️ Attention: Do not try to repair a hermetic compressor yourself. This requires special equipment for evacuation and charging the system.
Freon leak and capillary tube blockage
One of the most common reasons why the refrigerator has stopped freezingis a refrigerant (freon) leak. Freon circulates in a closed circuit, and if a microcrack forms in the tubes or evaporator, the gas gradually evaporates.
Signs of a leak: the compressor works constantly or with short breaks, trying to gain temperature, but there is no cold. The back wall may be warm or only slightly cool. Often, at the leak site (usually the foamed part of the body or the contour around the perimeter of the door), you can notice oily stains, as freon circulates along with the oil.
The second problem in this group is clogged capillary tube. An ice plug may have formed in the system or debris (oil oxidation products, dust) may have entered the system. This prevents the circulation of freon. As a result, the evaporator does not cool, and the condenser (grid at the back) remains cold or warm only at the outlet of the compressor.
| Symptom | Probable cause | Method solutions |
|---|---|---|
| The compressor runs constantly, there is no cold | Freon leak | Finding the leak, soldering, vacuuming, refilling |
| The motor hums for 5-10 seconds and clicks | Malfunction of the start relay | Replacement of the relay |
| The evaporator is covered with a “fur coat”, there is little cold | Clogged capillary tube | Purge the system, replacement filter-drier |
| The refrigerator rarely turns on, it’s warm inside | Thermostat malfunction | Replacing the thermostat |
Is it possible to fill the refrigerator with freon yourself?
Theoretically, it is possible if you have the equipment (pressure gauge station, vacuum pump, scales). However, without finding and eliminating the cause of the leak (if there was one), refilling will only give a temporary effect. In addition, different models require different types of freon (R134a, R600a), and an error in the dosage or type of gas can damage the compressor.
Failure of the No Frost system
In refrigerators with a system No Frost lack of cold is often associated with a malfunction of the defrost system. The evaporator, hidden behind a plastic panel in the freezer, becomes covered in ice. The fan stops driving cold air through the chambers, and the temperature rises.
Three main elements are responsible for the defrosting process: Defrosting heating element, a defrost sensor and a timer (or electronic module). If the heating element burns out, the ice does not melt. If the sensor is “faulty”, it does not give a command to turn on the heater or, conversely, does not turn it off in time.
You can understand that the problem is in defrosting by the characteristic hum of the fan (it can touch the ice) or by the fact that after the refrigerator is completely defrosted (for 24 hours with the doors open), it It starts to freeze normally, but after a few days the situation repeats itself.
For diagnostics, you will need to remove the back panel of the freezer and visually assess the amount of ice on the evaporator. The integrity of the heating element and the resistance of the sensors are also checked with a multimeter. Replacing these parts usually does not cause difficulties for home craftsmen.
When you need to call a specialist
Not all breakdowns can be repaired with your own hands. If you have checked the thermostat, relay, made sure that the seal is intact and there is no ice on the evaporator, but the refrigerator does not freezemost likely you will need professional repairs.
Complicated cases requiring specialist intervention:
- 🛠️ Replacement of the compressor: requires overhaul of the system, soldering of tubes and precise filling with freon.
- 🔍 Search for hidden leaks: Often it is necessary to open the foamed part of the housing, which without experience can lead to damage to the thermal insulation.
- 📟 Repair of the electronic module: resoldering parts on the control board requires skills in working with microelectronics.
- ❄️ Replacing the evaporator: in some models (especially the “crying” type), the evaporator is embedded in the wall, and replacing it is a labor-intensive process.
It is also worth contacting professionals if you do not have the necessary tools (multimeter, set of screwdrivers, hair dryer for defrosting ice) or you are not confident in your abilities. Inept intervention can turn a simple repair into an expensive replacement of the entire unit.
Why does the refrigerator freeze but does not turn off?
This is a classic sign of a freon leak or a clogged capillary tube. The compressor tries to compensate for the lack of cold and works to wear out. Also, the reason may be a loose fit of the door or a malfunction of the thermostat, which “does not see” that the temperature has already been reached.
Can a refrigerator freeze poorly in the summer?
Yes, in hot weather heat transfer is difficult. If the refrigerator is located near the radiator, in direct sunlight or in a niche without ventilation, it may overheat and freeze worse. Make sure that the gap between the back wall and the wall is at least 5-7 cm.
What to do if it is warm in the refrigerator compartment, but normal in the freezer?
Most often this is a problem with the fan (in No Frost) or a clogged cold air supply channel. It is also possible that the damper that regulates the air flow between the chambers may fail. Less commonly, the beginning of a freon leak.
Timely contact with a specialist and proper operation will extend the life of your refrigerator. Remember that preventative cleaning of the condenser from dust once a year helps to avoid overheating of the compressor and improves cooling efficiency.