The situation when your Atlant refrigerator stopped turning off, causing natural alarm. Constant operation of the motor is not only an increased consumption of electricity, but also a signal that a failure has occurred in the cooling system. Unlike short-term power surges, which can be caused by surges in the network, the continuous hum of the compressor indicates a more serious problem that requires intervention.
Often owners notice that the unit hums for days, trying to reach the set temperature, but never goes into rest mode. This can happen both on new models and on devices that have been in service for more than 10 years. It is important not to ignore this symptom, since long-term wear and tear can lead to complete failure of an expensive compressor. In this article we will analyze in detail the mechanical and electrical causes of the malfunction. You will learn how to independently carry out primary diagnostics and understand when exactly you need to call a technician. compressor.
In this article we will analyze in detail the mechanical and electrical causes of the malfunction. You will learn how to carry out initial diagnostics yourself and understand when exactly you need to call a specialist. If the compressor operates for more than 24 hours in a row without a rest break, this is guaranteed to lead to its overheating and thermal stroke.
Primary diagnostics: external factors and settings
Before disassembling the unit or calling masters, it is necessary to eliminate trivial operating errors. Quite often, the reason lies in incorrect installation or incorrect settings of the thermostat. Check to see if the refrigerator is too close to the wall or heating appliances.
⚠️ Attention: If the rear grille (condenser) is close to the wall, heat is not dissipated. This makes the sensors think that the temperature in the chamber is not low enough, and the motor continues to work.
The second important point is the operating mode. If you accidentally turn on the Super Freeze or Quick Freeze mode, the refrigerator will work at its maximum capacity until you forcefully disable this function. It is also worth checking the tightness of the door.
To quickly check the settings, follow these steps:
- 🔍 Inspect the thermostat: if it is set to the maximum value (usually 6 or 7), reduce it to 3-4.
- 🚪 Check the seal: do a test with a sheet of paper, pressing it with the door against perimeter.
- ❄️ Make sure that the intensive freezing mode is not turned on in the chamber.
Malfunctions of the thermostat and temperature sensors
One of the most common reasons why Atlant refrigerator does not turn off is the failure of the thermostat. This element is responsible for controlling the temperature inside the chambers. When the air cools to a predetermined level, the thermostat opens the circuit and the compressor stops.
If the thermostat is “stuck” in the “on” position or its contacts are oxidized, the signal to stop the motor is simply not received. In models with electronic control, a temperature sensor (thermistor) is responsible for this. Its readings may be distorted due to moisture or natural aging.
How to check a thermostat with a multimeter?
To check a mechanical thermostat, it must be removed (after defrosting the chamber). In a warm state, the contacts should be closed (the multimeter shows 0 Ohm). If you place the sensor in the cold (freezer) for 15 minutes, the circuit should open (infinite resistance). If this does not happen, the part is faulty.
Replacing the thermostat in most models Atlant is a simple procedure and can be done independently if you have basic tools. Electronic sensors require more accurate diagnostics, since their resistance changes smoothly.
Refrigerant leakage and compression problems
If the engine hums constantly, but there is no cold in the chambers or it is very weak, there is a high probability of a freon leak. The refrigerant circulates in a closed circuit, and if the seal is broken (microcracks in the evaporator, corrosion of tubes), its quantity decreases. The compressor tries to compensate for the lack of cold by working without stopping.
The second option is compression loss. The piston group of the motor wears out, and it ceases to create the necessary pressure for gas circulation. In this case, the refrigerator can work for days, but the temperature will not drop below +10...+15 degrees.
☑️ Signs of a freon leak
Clogged capillary tube
The refrigerant circulation system includes a narrow capillary tube. Over time, ice plugs or blockages from oil breakdown products may form inside it. This prevents the normal flow of freon. The pressure at the outlet of the compressor increases, but there is not enough pressure in the evaporator.
The symptoms are similar to a leak: the unit works without interruption, but does not freeze. A distinctive sign of a blockage is the characteristic behavior of the tubes. You can often notice that the condenser heats up unevenly, and the compressor itself is overloaded.
Failure of the control module
In modern models Atlant with a system No Frost and an electronic display, the control module is responsible for all processes. If a relay on the board burns out or a software failure occurs, the command to turn off the compressor may simply not be given.
Often this is accompanied by chaotic behavior of the indicators on the panel or their complete absence. The brain of the refrigerator gets stuck in the cooling cycle. Repairing the module requires soldering and checking electronic components, which can only be done by a qualified specialist.
Table: Comparison of symptoms of various faults
For ease of diagnosis, we have collected the main symptoms of breakdowns in a summary table. This will help you quickly navigate the nature of the problem.
| Malfunction | Temperature in the chambers | Compressor behavior | Additional symptoms |
|---|---|---|---|
| Leakage freon | Above normal (heat) | Works constantly, hot | Cold condenser, hissing |
| Capillary clogged | Above normal or normal | Works constantly, overheating | Uneven heating of the grill |
| Thermostat is faulty | Below normal (freezing) | Does not turn off at all | Ice crust on the back wall |
| Electronics failure | Chaotic | Chaotic operation | Flashing indicators, errors |
Impact environment and operating conditions
Do not forget that a refrigerator is a heat pump that transfers heat from the chamber to the outside. If the room where it is located Atlantis too hot (above +30°C), the heat transfer efficiency decreases. The motor is forced to work longer to remove heat.
It is also important to consider the location of the unit. Direct sunlight falling on the cabinet or proximity to the stove creates artificial heat. In such conditions, even a working refrigerator can operate in enhanced mode, although it must be turned off periodically.
When a call to the technician is necessary
Independent repair is possible by replacing the thermostat or eliminating problems with the seal. However, there are situations where non-professional intervention can only do harm. If you find that the cooling system tubes have traces of oil, this is a direct sign of depressurization.
Also, you should not try to open the freon circulation system without a license and equipment. This is not only technically difficult, but also dangerous. If after defrosting for 24 hours the problem does not disappear and the thermostat settings are set correctly, it’s time to call service.
⚠️ Attention: Do not try to solder the tubes yourself or add freon “by eye”. An incorrect dose of refrigerant or the presence of moisture in the system will lead to the death of the compressor within a few months.
Frequently asked questions (FAQ)
Can the Atlant refrigerator work without turning off in the summer?
Very In hot weather, the operating time of the compressor increases, but it must still be turned off periodically (cyclical operation). If it hums for days, even in summer, this is a malfunction, not the norm.
Why does the refrigerator not turn off for a long time after defrosting?
Immediately after defrosting, the unit needs time to gain temperature in the “warm” volume. This may take from 2 to 6 hours. If it does not turn off during this time, the problem is deeper.
A click is heard and the refrigerator turns off, but after a minute it turns on again. What is this?
This is a sign of a malfunction of the compressor starting relay or the motor itself. The motor tries to start, but cannot, the thermal protection trips, it cools down and tries again. The equipment cannot be operated in this mode.
Does the amount of food in the refrigerator affect its operating time?
Yes, a full chamber takes longer to cool down after loading warm foods or after defrosting. However, an empty refrigerator can also work longer if there are few “cold accumulators” (for example, water bottles) in it, since the air quickly heats up when the door is opened.