The situation when the refrigerator has stopped freezingalways takes you by surprise, threatening product damage and financial losses. Initial panic is understandable, but to effectively solve the problem you need to remain calm and act consistently. Often the reason lies not in a complex breakdown, but in a banal overload or improper operation, which can be easily corrected on your own.
Before calling a technician, it is worth conducting an initial diagnosis to eliminate simple errors. If the unit hums, but there is no cold, or, conversely, there is unusual silence, these are the first signals to start checking. In this material, we will analyze an algorithm of actions that will help determine the nature of the malfunction and understand whether professional refrigerator repair or simple manipulations are sufficient.
Primary visual diagnostics and power check
The first step is to eliminate problems with electricity supply. Make sure that the plug is firmly inserted into the outlet and that the cable itself is not damaged. Sometimes the problem lies in power surges, which trigger automatic protection or blow a fuse. Check whether the indicator light is on, if provided by the design of your model Bosch, Indesit or Atlant.
Pay attention to the operation of the compressor. If it is silent, but the light inside the chamber is on, this may indicate a malfunction of the start relay or the motor itself. In some cases, especially after power surges, the equipment may go into protection mode, and it will take time or a complete reset to start it.
⚠️ Attention: Before starting any manipulations with electrical wiring or internal components, be sure to disconnect the device from the network. Working with electricity requires strict adherence to safety precautions.
Check whether the automatic safety equipment in the panel has tripped. If your refrigerator is connected through an extension cord or surge protector, try plugging it directly into the outlet. Often, old or cheap extension cords cannot withstand the starting currents of the compressor, which leads to a break in the circuit.
Analysis of the operation of the compressor and starting relay
The compressor is the “heart” of the refrigeration system, creating pressure for the circulation of the refrigerant. If you hear that the motor is trying to start, makes a clicking sound and goes silent, or hums but does not start, the problem most likely lies in the start relay or the motor windings. Start relay is responsible for providing the impulse to start the motor, and its failure is a common reason for stopping.
In modern models with inverter compressors, diagnostics are more difficult, since they operate smoothly, without characteristic clicks. If such a refrigerator has stopped freezing, but continues to hum quietly, there may be a malfunction in the electronic control module, which does not send the correct commands to the engine.
- 🔌 Clicks during startup: Indicate an attempt to start and the thermal protection has tripped, often the starting relay is to blame.
- 🤐 Complete silence: May indicate an open circuit, burnt winding or malfunction of the thermostat.
- 🔥 Intense heating of the case: If the compressor is hot, but does not work, it may be jammed or the thermal protection has tripped.
For accurate diagnosis of the condition of the windings you will need a multimeter. The resistance between the contacts must be within certain limits. If the meter shows an open (infinity) or short circuit (zero), the compressor is most likely faulty and requires replacement.
How to check the start relay?
Carefully remove the plastic casing from the side of the compressor. There is a start relay inside. Shake it: if you hear a ringing sound (like a dropped ball), it means that the internal contact group is damaged and the relay needs to be replaced. This is a cheap and common breakdown.
Checking the defrosting system and evaporator
In refrigerators with a system No Frost or drip defrosting, the condition of the evaporator is critically important. If the unit has stopped freezing, but the compressor is running continuously, the evaporator may be covered with a “coat” of ice, which is blocking the circulation of cold air. This often occurs due to the failure of the defrost heating element, timer or defrost sensor.
Signs of such a malfunction may be ice in the back of the refrigerator compartment or, conversely, a complete absence of frost when the compressor is running (which indicates a freon leak, but more on that in the next section). In systems No Frost ice can accumulate on the hidden evaporator, blocking the air supply channels.
| Symptom | Possible cause | Action |
|---|---|---|
| The compressor is humming, cold no | Malfunction of the defrosting heating element | Ring the heating element with a multimeter |
| Ice in the freezer, in the refrigerator | Clogged air outlet | Defreeze 24 hour |
| Water under the refrigerator | Drain hole clogged | Clean with a brush |
| Frost only at the entrance to the chamber | Faulty defrost sensor | Replacing the sensor |
If you find an ice sheet, the easiest and most effective way to check is to completely defrost it. Unplug the refrigerator, open the doors and leave it for at least a day. This will allow the ice to melt and free up the air channels.
☑️ Correct defrosting
Diagnostics of refrigerant leaks and blockages
If after defrosting the problem does not disappear and the compressor it works, but does not cool, there is a high probability of a freon leak or a clogged capillary tube. The refrigerant circulates in a closed circuit, and a violation of its tightness leads to a loss of cooling capacity. Leaks often occur at the solder joints of the tubes or in the foamed part of the housing due to corrosion.
A critical sign of a leak is the complete absence of heating of the condenser grille (radiator) on the rear wall when the compressor is running. Normally, the grille should be warm or hot. If it is cold and the motor is humming, the freon is out or the system is clogged.
A clogged capillary tube is often accompanied by similar symptoms. In this case, the compressor may work overload, trying to push the refrigerant. It is almost impossible to determine the exact location of a blockage or leak without special equipment (leak detector, pressure gauge station).
⚠️ Attention: Self-filling the refrigerator with freon is prohibited and dangerous. This requires evacuation of the system, accurate calculation of the mass of refrigerant and special equipment. An attempt to refuel “by eye” will lead to compressor breakdown.
If a leak or blockage is confirmed, a call to the technician is required. The specialist will conduct a nitrogen test to find the location of the damage, replace the filter-drier and charge the system with the required amount of refrigerant according to the technical data sheet of the model.
Malfunctions of the thermostat and sensors
The thermostat (thermostat) is a device that controls the temperature inside the chambers and gives a command to turn the compressor on or off. If the refrigerator has stopped freezing, but it may be too cold inside or, conversely, warm, the reason may be “sticking” of the thermostat contacts.
In electronic models LG, Samsung or Whirlpool air sensors are used instead of a mechanical thermostat. Their readings are read by the control module. If the sensor is lying, the module may “think” that the chamber is already cold and does not turn on the compressor, or does not give a defrost command.
- ❄️ The refrigerator does not turn on: Thermostat contacts do not close, the compressor does not receive a start signal.
- 🧊 Continuous operation: Thermostat does not opens the circuit, the refrigerator works non-stop, causing freezing.
- 🌡️ Incorrect readings: The temperature sensor shows incorrect data, disrupting the electronics operation algorithm.
You can check a mechanical thermostat by closing its contacts directly (bypassing the device itself). If after this the compressor starts and starts to freeze, then the thermostat is faulty and requires replacement. Electronic sensors require diagnostics with a temperature resistance tester.
Problems with seals and tightness
Often users forget that the efficiency of the refrigerator directly depends on the tightness of the chamber. If the rubber door seal is worn out, dirty or deformed, warm air constantly enters the chamber. The compressor tries to compensate for the heat, working hard, but cannot reach the desired temperature.
You can check the tightness using a simple test with a sheet of paper. Clamp the sheet of paper around the perimeter with the door. If it comes out easily, without resistance, it means that the seal does not fit tightly in this place. Also inspect the rubber for cracks, tears or sticky deposits.
Dirt from the seal can be easily removed with warm water and a mild detergent. If the rubber has lost its elasticity, you can try to gently heat it with a hairdryer to restore its shape, but this is a temporary measure. In case of serious damage, the sealing tape will need to be replaced.
When a call to a specialist is necessary
Despite the possibility of self-diagnosis, there are situations when specialist intervention is inevitable. If you have identified a freon leak, a compressor breakdown, or a complex electronic malfunction, further independent experiments can lead to the final failure of the equipment.
Professional help is also needed if you need to replace sealed components, such as the filter drier or the compressor itself. These operations require professional tools and skills in soldering copper tubes in confined spaces.
Do not ignore warranty obligations. If the refrigerator is under warranty, any independent opening of seals or repairs will result in denial of free service. In such cases, the only correct solution is to contact an authorized service center.
Frequently asked questions (FAQ)
Why does the refrigerator hum but not freeze?
This may indicate a freon leak, a clogged capillary system, or a malfunction of the start relay. The compressor works, but the refrigerant does not circulate or the required pressure is not created.
How long does it take to defrost the refrigerator?
To completely defrost and restore the system operation No Frost it is recommended to leave the refrigerator turned off with the doors open for at least 24 hours.
Is it possible to operate a refrigerator if it does not freeze well?
Long-term operation in this mode is dangerous for the compressor, which works non-stop. This can lead to overheating and burning of the windings. It is better to eliminate the cause promptly.
How often do you need to change the filter in the refrigerator?
In refrigerators, the filter-drier is changed every time the refrigerant circuit is opened (during repairs). In water purification systems inside the refrigerator, the filter is changed every 6 months.
Why is it warm in the refrigerator compartment and ice in the freezer?
Most often this is a sign of a malfunction of the defrost system (the heating element or timer has burned out) or a freon leak. There is still cold in the freezer, but it no longer enters the upper chamber.