The situation when the refrigerator does not turn offis one of the most alarming for the owner of household appliances. You can notice this by the continuous hum of the compressor, the absence of pauses in the operation of the unit, or the fact that the appliance door has become hot to the touch. Ignoring this problem inevitably leads to rapid wear and tear of expensive equipment and spoilage of products.
It is important to understand that the operating mode of the refrigeration unit directly depends on many factors: room temperature, chamber load, serviceability of sensors and circuit tightness. Compressor is the heart system, and its continuous wear and tear can lead to overheating and complete failure of the motor in a matter of days.
In this article we will analyze in detail why The refrigerator stopped turning offhow to carry out initial diagnostics with your own hands and in which cases you can’t do without calling a technician. We will consider both trivial operating errors and complex technical malfunctions.
Primary diagnostics and external factors
Before sounding the alarm and looking for a breakdown within the system, it is necessary to exclude the influence of external factors. Often the reason that the refrigerator does not turn offlies in improper operation or environmental conditions.
Check whether the unit is located too close to heat sources. Heating radiators, stoves, ovens or direct sunlight heat the housing, causing the temperature sensors to “think” that the inside of the chambers is hot. In this case, the motor will work without interruptiontrying to cool the volume, which is constantly heated from the outside.
It is also worth paying attention to the tightness of the sealing rubber. If warm air from the room enters the chamber, the cooling system will not be able to reach the set temperature. Check the doors: they should fit tightly to the housing along the entire perimeter.
⚠️ Attention: If you find that the seal is damaged, pinched or dirty, this may be the main reason for the continuous operation of the compressor. Don't ignore even small gaps.
The next step is to check the temperature settings. Perhaps one of the household members accidentally activated the “Super Freeze” function (or Super Freeze). In this mode, the refrigerator operates constantly, ignoring standard shutdown cycles in order to freeze food as quickly as possible.
Malfunctions of the thermostat and sensors
One of the most common technical reasons why the refrigerator does not turn offis the failure of the thermostat (thermostat). This element is responsible for monitoring the temperature inside the chamber and sending a signal to turn off the compressor when the set values are reached.
If the thermostat is broken in the “on” position, it simply does not open the electrical circuit. The compressor continues to hum, even when ice has already formed inside and the food is frozen. In older models with mechanical control, the capillary tube of the thermostat itself often breaks or the seal of the bellows is lost.
In modern models with a system No Frost and electronic control, air sensors are responsible for the temperature. Their readings may be distorted due to oxidation of the contacts or a software failure of the controller. In such cases, error codes may appear on the display indicating a problem with the sensor.
Diagnostics of the thermostat requires a multimeter. It is necessary to “ring” the contacts of the device at different temperatures. If the circuit does not open when the sensor is cooled (for example, by putting it in the freezer), the part must be replaced.
Problems with the refrigerant and compressor
A serious reason for the continuous operation of the unit is freon leakage. When the quantity refrigerant in the system decreases, the pressure drops and the compressor cannot reach the required condensing temperature. It works to the limit of its capabilities, trying to compensate for the lack of gas, but the cold is not produced in the required volume.
Often the leak is accompanied by swelling of the rear wall of the refrigerator or the appearance of yellowish oily spots at the junction of the tubes. If you notice such signs, operation of the device should be stopped until the technician arrives.
Another problem is a decrease in the performance of the compressor itself. Over time, the motor wears out and the valves inside it lose their tightness. As a result, the compressor hums, but does not create enough pressure to circulate freon. The system “thinks” that there is no cold and does not give a command to stop.
Is it possible to refill the refrigerator with freon yourself?
Refilling it yourself is highly not recommended. This requires special equipment (vacuum pump, pressure gauge station) and knowledge about the types of oil and freon for your model. Incorrect refilling will lead to compressor failure.
The table below shows the main symptoms that help distinguish a freon leak from other problems:
| Symptom | Probable cause | System response |
|---|---|---|
| The compressor is hot, but the cold does not come | Freon leak or blockage | Work without stopping |
| The motor hums, but does not start | Faulty start relay | Clicks and hums |
| The refrigerator turns off after 1-2 minutes | Overheating or compressor breakdown | Short cycles |
| Frost only in the corner of the freezer | Lack of refrigerant | Long operation |
The influence of the No Frost defrosting system
Owners of equipment with the system No Frost may encounter a situation where the refrigerator does not turn off due to problems in the circuit defrost. If the heating element, timer or defrost sensor fails, a “coat” of ice grows on the evaporator.
This ice blocks the circulation of cold air. The temperature sensor located in the air duct does not detect cooling and continues to keep the compressor on. In this case, there may be warmth in the main chamber, and an ice ball in the freezer.
To check, you need to defrost the refrigerator manually (by leaving it turned off for a day) and check whether cold appears after turning it on. If, after complete defrosting, the unit started working normally, and after a week it stopped turning off again, the problem is in the defrosting system.
⚠️ Attention: Frequent formation of ice on the back wall or bottom of the freezer is a sure sign of a malfunction of the defrosting system. Do not expect a complete failure of the equipment.
Errors in operation and loading of chambers
Sometimes the answer to the question “why the refrigerator does not turn off” lies in the actions of the user himself. Excessive loading of the chambers with warm products causes the motor to work in increased mode for a long time.
By placing a pan of hot soup or a large amount of defrosted meat, you artificially increase the temperature inside. The unit will work until the entire volume has cooled, which may take several hours or even days.
- 🥘 Do not put hot foods inside, let them cool to room temperature.
- 📦 Do not fill the refrigerator with food to capacity, this interferes with air circulation.
- 🚪 Make sure that the doors are tightly closed and not opened unnecessarily.
It is also worth checking whether the control buttons on the panel are stuck (if it is touch-sensitive or mechanical). Sometimes contamination or moisture leads to the fact that the switch on command is permanently recorded.
Algorithm of actions when a problem is detected
If you understand that the refrigerator does not turn off it is not due to external factors, you need to act according to plan. First, conduct a visual inspection and listen to the operation of the unit. Pay attention to the nature of the noise: a steady hum or intermittent sounds.
Then try changing the temperature settings. Set the mode to minimum cooling. If after 30-40 minutes the compressor does not turn off, the problem is of a technical nature. In this case, self-repair is only possible if you have the skills and tools.
☑️ Diagnostics of continuous operation
If you feel intense heat from the motor or a burning smell, immediately disconnect the appliance from networks.
When you need to call a technician
There are a number of symptoms that make DIY repairs impossible or dangerous. If you need to replace the compressor, refill with freon or complex repair of the electronic board, it is better to entrust this to professionals.
A master is needed if:
- 🔧 The compressor hums, but does not start (the starting relay or motor needs to be replaced).
- ❄️ B There is no ice in the freezer, but the compressor is working (a leak is likely).
- 💡 The display shows error codes that are not reset.
A timely call to a specialist is often cheaper than buying a new refrigerator to replace one that burned out due to overload. Modern units are equipped with complex electronics, the diagnosis of which requires special equipment.
Can the refrigerator not turn off due to power surges?
Yes, power surges can damage the electronic control board or compressor start relay. As a result, the unit may begin to operate in emergency mode without shutting down. It is recommended to use a voltage stabilizer.
Is it normal that the refrigerator does not turn off in the summer?
In the summer, operating cycles may increase, but a complete absence of pauses (more than 20% of the time) is not the norm, even in the heat. If the room is +30°C, the refrigerator will work longer, but it should still stop periodically.
What to do if after defrosting the refrigerator does not turn off again?
This indicates that the problem is not ice, but a malfunction of the components (thermostat, freon, compressor). It is necessary to diagnose technical components.
How long should the refrigerator rest between cycles?
The work and rest times depend on the model and load, but usually the work cycle is 10-20 minutes, and the rest cycle is from 15 minutes to an hour. If there are no pauses at all, this is a malfunction.