The situation when Atlant refrigerator does not turn off and works around the clock is familiar to many owners of household appliances. Instead of the usual hum of a working compressor, followed by silence, you hear the monotonous hum of the engine day and night. This is not just an irritating factor, but also an alarming signal that the cooling system is working in emergency mode, trying to achieve the set parameters, but cannot do so.
Constant operation of the unit leads to rapid wear of expensive components, especially the compressor, which in normal mode should rest up to 70% of the time. If you ignore the problem in the early stages, you may encounter complete equipment failure or food spoilage due to insufficient cooling. In this article, we will analyze in detail the main reasons why Atlant refrigerator does not turn off, and we will tell you what to do in each specific case.
Before sounding the alarm and calling a technician, it is worth carrying out the initial diagnosis yourself. Often the reason lies in banal operating errors or external factors that can be easily eliminated. However, if simple measures do not help, a more in-depth analysis of technical components will be required.
Operating errors and external factors
The most common reason why Atlant refrigerator does not turn off is not at all related to breakdowns of internal mechanisms. Often the user himself inadvertently creates conditions under which the equipment is forced to work for wear and tear. The first step is to check how tightly the doors close. If the rubber seal is dirty, deformed or simply not completely closed, warm air constantly penetrates into the chamber.
Sensors record the temperature increase and give the command to the compressor to work without stopping. It is also worth paying attention to the location of the equipment. If the unit is located too close to the radiator, stove, or is exposed to direct sunlight, the thermoregulation system will not work correctly. In such conditions the temperature inside the chambers may not drop to the required values, even if the motor hums for days..
Another important aspect is the loading of the freezer and refrigeration chambers. If you have just placed a large amount of warm food or often open the door in a hot room, the refrigerator simply does not have time to cool the volume. In this case, the “super freezing” mode or simply intensive operation is a normal reaction of the system.
Check the temperature settings. Perhaps one of the household members accidentally turned the regulator to maximum cooling. For standard storage of products, average values are sufficient.
- 🔍 Check the tightness of the doors and the cleanliness of the seal.
- 🌡️ Assess the temperature in the room and the presence of heat sources near the equipment.
- 🚪 Make sure the door is not skewed and easily closes.
- 📦 Do not load hot dishes into the chambers and monitor the loading volume.
It is also worth mentioning the fast freezing mode. On some models Atlant there is a button for forced operation of the compressor. If it is activated, the refrigerator will work continuously until you manually disable this function. Carefully study the control panel of your model.
Faults of the thermostat and sensors
If external factors are excluded, the likely cause of constant operation is failure of thermostat (thermostat). This device is responsible for turning the compressor on and off depending on the temperature inside the chambers. When the thermostat breaks, its contacts can “stick” in the closed position, which is why the signal to stop the motor simply does not arrive.
Modern models with the No Frost system and electronic control use air sensors and defrost sensors instead of a mechanical thermostat. If one of them transmits incorrect data to the control module, the system “thinks” that the chamber is too warm and does not give a command to stop. Diagnosis of such faults requires multimeter and certain knowledge.
⚠️ Attention: Replacing the thermostat yourself is only possible if you have the skills to work with electrical equipment. Before any manipulations, be sure to unplug the refrigerator!
Signs of a malfunctioning thermostat are often accompanied by either a complete absence of cold, or, conversely, excessive hypothermia of food, in which the compressor continues to hum. In mechanical models, you can try gently turning the temperature control knob. If there is no click and the motor does not respond, there is a high probability of breakdown.
How to check the thermostat with a multimeter?
To check, you need to remove the thermostat, immerse its sensitive tube in cold water with ice and ring the contacts. If the resistance does not change or the circuit does not open when cooling, the part is faulty and requires replacement.
Problems with the compressor and start relay
The heart of any refrigerator is the compressor. If Atlant refrigerator does not turn off, the problem may lie in a decrease in its performance. Over time, the compressor wears out, the piston group loses its tightness, and it ceases to create the necessary pressure in the system. The motor works, but does not pump freon with the required intensity, so the temperature is not reached and the cycle does not complete.
The start-protection relay also often fails. This small element is responsible for starting the engine and protecting against overloads. If the relay is stuck or burnt out, the compressor may hum but not start, or may run continuously trying to compensate for the loss of power. In such cases, you often hear a characteristic click when trying to start or, conversely, silence when the fan is running (if there is one).
Replacing a compressor is a complex and expensive process that requires special equipment for evacuation of the system and charging the refrigerant. Repairing the starting relay is cheaper and can often be done by a technician at home.
- 🔊 Listen to the sound of the motor: a steady hum or intermittent clicks?
- 🔥 Check the temperature of the compressor housing: it should not be hot.
- ⚡ Measure the power consumption current to identify the interturn short circuit of the windings.
It is important to understand that if the compressor runs without stopping, it gets very hot. The thermal protection relay may trip and turn off the equipment, but after cooling the cycle will repeat. Long-term operation in this mode leads to a wedge of the compressor.
Refrigerant (freon) leakage
One of the most insidious reasons why Atlant refrigerator does not turn off is a freon leak. The refrigerant circulates in a closed circuit, and in a working system its quantity does not change for years. However, due to corrosion of the evaporator, mechanical damage or manufacturing defects, a microcrack may form.
When freon evaporates, the pressure in the system drops. The compressor tries to compensate for the lack of refrigerant by working in increased mode, but cannot reach the desired temperature. As a result, the engine hums for days, and the chambers are warm. It is difficult to notice a leak visually, since freon is colorless and odorless.
An indirect sign of a leak can be swelling of the wall of the refrigeration chamber (if the evaporator is foamed in the wall) or the appearance of an oily stain under the equipment (oil comes out along with the gas). Also, frost may appear on the tubes only at the beginning of the circuit, while the rest of the circuit remains warm.
⚠️ Attention: Filling a refrigerator with freon is not just “topping up gas.” It is necessary to find the leak, seal it, replace the filter drier, evacuate the system and only then charge the refrigerant strictly by weight.
It is almost impossible to fix the leak and charge the system yourself without professional tools. Attempts to simply add freon without eliminating the cause will only lead to a short-term effect and repeated breakdown.
Clogged capillary tube
There is a narrow section in the refrigerant circulation system - the capillary tube. It serves as a throttle separating the high and low pressure zones. Over time, a blockage may form in it due to oil oxidation products, moisture or debris that has entered during poor-quality repairs.
If blocked, freon cannot circulate normally. The compressor tries to push gas, working at its limit, but cooling does not occur. A characteristic sign of a blockage is that the condenser (grid at the back) only partially heats up or remains cold, and the compressor runs very hot.
To eliminate this problem, you need to flush the system with high pressure nitrogen, replace the filter drier and refill. This is a complex technical procedure that is carried out in service centers.
Failure in the control module (for models with electronics)
Modern refrigerators Atlant are equipped with electronic control modules. This is the “brain” of the device, which processes signals from sensors and controls actuators. If there is a failure in the electronics, a power surge, or one of the board elements burns out, the command to turn off the compressor may not be received.
In such cases, the refrigerator may behave inappropriately: blink indicators, make beeps, or simply work without interruption. Sometimes a complete reset (reboot) helps, but more often it requires resoldering board elements or replacing the entire module.
Electronics diagnostics require special knowledge and circuits. Without experience, it is better not to climb inside the control unit, as you can damage serviceable tracks or get an electric shock.
- 💡 Check if the indicators on the control panel are blinking.
- 🔌 Try unplugging the refrigerator for 15-20 minutes to reboot.
- 🔍 Inspect board for blackening, swollen capacitors or a burning smell.
Table: Diagnosis of main faults
For convenience, we systematize the main symptoms and probable causes in a table. This will help you get your bearings before calling a technician.
| Symptom | Probable cause | Difficulty of repair |
|---|---|---|
| The compressor hums, but does not start | The starting relay or compressor wedge is faulty | Medium / High |
| The motor runs without stopping, there is no cold | Freon leakage or capillary tube clogged | High (a technician is needed) |
| The refrigerator does not turn off, but freezes heavily | The thermostat is faulty (contacts are stuck) | Low / Medium |
| The appliance works constantly after defrosting | Moisture has entered the system or electronics failure | Medium |
| The compressor is hot, the condenser is barely warm | Low compressor performance or leakage | High |
☑️ Checklist before calling a technician
When you need to call a specialist
If you have checked all external factors, made sure the seal is working properly and the settings are correct, but Atlant refrigerator still does not turn off, most likely the problem is of a technical nature. The intervention of a professional is necessary if you suspect a freon leak, a clogged system or a compressor breakdown.
Attempts to independently disassemble a sealed circuit or replace a compressor without experience often lead to final breakdown of the unit. The technician will arrive with the necessary equipment: pressure gauges, a leak detector, a vacuum pump and a supply of consumables.
Timely repairs will extend the life of your equipment. Ignoring the problem when the engine is running 24/7 can lead to its combustion, and replacing the compressor is much more expensive than fixing a leak or replacing a thermostat.
Why does the refrigerator work normally, but does not turn off after defrosting?
After defrosting, excess moisture may remain in the system, which freezes in the capillary tube, creating an ice jam. The defrost cycle in the No Frost system could also be disrupted. Let the refrigerator stand off for 5-6 hours with the doors open, then turn it on. If the problem recurs, you need to diagnose the defrost sensors.
Is it possible to operate the refrigerator if it does not turn off?
For a short time - yes, but no more than a few hours. Long-term operation without stopping leads to overheating of the compressor windings, oil degradation and other motor failure. In addition, this is a huge energy consumption.
How long should the Atlant refrigerator compressor normally work?
Under normal conditions, the operating cycle is approximately 10-15 minutes, followed by a pause of 20-30 minutes. The operating time may increase in hot weather or under heavy load, but continuous operation without interruption is a sign of malfunction.
Does the quality of the mains voltage affect the operation of the compressor?
Yes, low voltage or large surges can cause the start relay to not operate correctly, or the motor to operate under overload. It is recommended to connect powerful equipment through a voltage stabilizer.