The situation when Atlant refrigerator works without interruption is familiar to many owners of this equipment. Instead of the usual “work-rest” cycle, the unit hums for days on end, trying but not being able to reach the desired temperature or simply ignoring the controller’s commands. This not only leads to a sharp increase in electricity bills, but also creates an excessive load on the main components, which can ultimately damage the expensive compressor.
There is no need to panic in such a situation, although you should not hesitate to diagnose. Most often, the problem lies in a violation of the tightness of the circuit, failures in the electronics, or a simple breakdown of the thermostat. Understanding exactly how your Atlant refrigeratorbehaves will help you quickly determine the source of the malfunction and decide whether you need to call a technician or you can do it yourself.
In this article we will analyze in detail all possible scenarios why compressor does not receive a stop signal. We will consider both external factors that you can check right now, as well as complex internal breakdowns that require specialist intervention. If the compressor works for wear and tear for more than 24 hours without stopping, this is guaranteed to lead to its thermal overheating and jamming of the piston group.
Violation of tightness and problems with the seal
The most commonplace, but no less common reason for the continuous operation of the refrigerator is the loss of the seal of the chamber. If warm air from the room constantly enters the system, thermostat records an increase in temperature and commands the compressor to work without stopping. In two-chamber Atlant models, this is especially noticeable when the temperature balance between the freezer and refrigerator compartment is disturbed.
First of all, you need to inspect the rubber seal round the perimeter of the door. Over time, rubber loses elasticity, cracks or deforms, forming cracks. Even a microscopic gap of 1-2 millimeters can allow a sufficient volume of warm air to pass through for the cooling system to operate in emergency mode. Check the tightness of the magnetic tape, especially in the corners and around the hinges.
It is also worth paying attention to the condition of the door itself. If it is skewed or the hinges are loose, the geometric integrity of the contour is compromised. In models with the system No Frost this also leads to increased formation of ice on the evaporator, which completely blocks normal air circulation.
⚠️ Attention: When checking for leaks, use a sheet of paper. Squeeze it with the door and try to pull it out. If the paper comes out easily anywhere around the perimeter, the seal requires replacing or adjusting the hinges.
You should not ignore the frequency of door openings. If the house is hot, and you often look into the refrigerator or leave the door ajar while cooking, the equipment simply does not have time to cool the volume of the chamber to the specified values. In this case motor-compressor works correctly, just the load on it has temporarily increased.
Faults of the thermostat and temperature sensors
The thermostat (or thermostat) is the “brain” that controls turning on and off refrigerator. In older mechanically controlled Atlant models, this is a physical device with a bellows, the capillary tube of which is located in the chamber. If the thermostat is “stuck” in the “on” position, the compressor will hum endlessly until you forcibly disconnect the device from the network.
In more modern models with electronic control, sensors (thermistors) are responsible for temperature control. Their readings are read by the electronic control module. If the sensor fails and transmits low temperature values (for example, it shows +5°C when the chamber is already -10°C), the controller will not give a command to stop the engine. Diagnosis of such faults requires a multimeter to check the resistance.
Symptoms of a thermostat failure are often accompanied by the absence of a characteristic click when the desired temperature is reached. On mechanical models you should hear this sound. If the refrigerator is cold, the food is frozen, and the motor does not turn off, most likely the problem is in the temperature control circuit.
Replacing the thermostat in Atlant mechanical models is a procedure accessible to a home handyman. It requires removing the casing, disconnecting the contacts and installing a new element with similar characteristics. However, in electronic models, replacing sensors may require flashing or adjusting the control board.
☑️ Diagnostics of the thermostat
Refrigerant leak and problems with the compressor
One of the most serious reasons why the Atlant refrigerator does not turn off is a leak freon. When the amount of refrigerant in the system drops, the efficiency of heat transfer decreases sharply. The compressor continues to work, trying to compensate for the lack of pressure and increase the temperature, but physically cannot do this. As a result, it works for wear and tear 24/7.
Signs of a freon leak can often be noticed visually or tactilely. The condenser grille on the rear wall may be only partially hot or completely cold. In this case, the compressor itself will be hot, and in the fridge compartment the temperature will be higher than normal, even with continuous operation.
Another problem associated with the compressor is the loss of its performance. The valves inside the motor can wear out, and it ceases to create the necessary pressure in the system. In this case, even with a full circuit and a working thermostat, the refrigerator will not go into operation and will not turn off. This condition is often called “the compressor does not hold pressure.”
| Symptom | Probable cause | Required actions |
|---|---|---|
| Compressor hot, grille cold | Freon leak or blockage | Call a technician to find a leak |
| There is a humming sound, no cold | A drop in compressor performance | Replacing the compressor |
| Relay clicks, starting at 1-2 sec | Malfunction of the start relay | Replacement of the start-protection relay |
| The refrigerator freezes, but does not turn off | The thermostat or sensor is faulty | Diagnostics and sensor replacement |
It is important to understand that working with refrigerant requires special equipment and a license. Trying to refuel the system yourself or solder tubes without experience is strictly not recommended - this can lead to complete failure of the unit.
Failures in the electronic control module
Modern Atlant refrigerators are equipped with complex electronic modulesthat control all processes. Power surges, moisture, or manufacturing defects can lead to board glitches. In this case, the processor may simply “hang” in the cooling cycle and not send a signal to shut down, even if the temperature has been reached.
Often, electronics suffer from high humidity inside the chamber or condensation that drains onto the control board. Corroded contacts or swollen capacitors are typical causes of incorrect operation. A visual inspection of the board may reveal blackening or oxides, but accurate diagnosis is better done using an oscilloscope.
In some cases, a simple resetting errors (reboot) helps. To do this, disconnect the refrigerator from the network for 15-20 minutes. If after switching on the operation cycle returns to normal, it means that a single software failure has occurred. If the problem repeats, repair or replacement of the module is required.
Why are power surges dangerous for the refrigerator?
Sudden changes in voltage in the network can damage not only the power supply, but also distort the signals coming from temperature sensors. This leads to the control module receiving incorrect data and making erroneous decisions, for example, not turning off the compressor when the desired cold is reached.
Replacing an electronic module is an expensive repair. Before purchasing a new board, be sure to make sure that all peripheral devices (sensors, fans, compressor) are in good working order, since a faulty sensor can also burn out the new module.
The influence of fast freezing mode and external factors
Sometimes the reason for continuous operation lies not in the breakdown, but in the settings. The function "Super Freeze" (Super Freeze), which is available in many Atlant models, forcibly turns off the thermostat and forces the compressor to work constantly. This mode is designed to quickly freeze large quantities of fresh food.
If you accidentally activate this function (by pressing a button on the control panel or turning the dial to the appropriate position), the refrigerator will work without interruption until you turn off the mode manually or the automatic timer passes (usually 24-48 hours).
External factors also include the location of the refrigerator. If the unit is placed close to a wall, next to a radiator, or in direct sunlight, the cooling system cannot dissipate heat effectively. In such conditions, condenser overheats, and the refrigerator is forced to work longer to compensate for heat inflows.
It is also worth considering seasonality. In summer, when the room temperature reaches +28...+30°C, the compressor operating time naturally increases. This is normal if rest periods are still present, albeit short ones.
Clogging of the capillary tube and moisture removal system
Technical blockage is a physical obstruction in a narrow part of the refrigeration circuit, most often in capillary tube. Through it, liquid freon enters the evaporator. If there is microscopic moisture in the system, it turns into an ice plug in this narrow place, blocking the circulation of the refrigerant.
When clogged, the compressor pumps freon “to nowhere”, the outlet pressure increases, but there is no cold in the chamber. The motor runs constantly, trying to push through the plug. A characteristic sign is that the condenser (grid at the back) may be hot only at the beginning or completely cold, and the filter drier may be covered with frost.
Removing the blockage requires professional cleaning of the system with nitrogen, evacuation and refilling with freon. At home, without a vacuum pump and a pressure gauge station, it is impossible to perform this procedure efficiently.
⚠️ Attention: Attempts to break through the blockage by heating the filter or tube with an open fire are dangerous! This can lead to depressurization of the system, a fire due to oil in the pipes and damage to the compressor.
Often, clogging is accompanied by the accumulation of moisture in the drainage system, especially in models with No Frost. If the water does not leave, it freezes on the evaporator, turning into an ice ball that blocks the fans. In this case, the refrigerator may also work longer than usual, trying to cool a volume that cannot be blown through with air.
Frequently asked questions (FAQ)
How long should the Atlant refrigerator compressor normally work?
Under normal conditions, the refrigerator works approximately 30-40% of the time (about 10-15 minutes it works, 20-25 rests). However, this parameter strongly depends on the room temperature, the load of the chambers and the serviceability of the seal. In summer, the operating time may increase.
Is it possible to operate the refrigerator if it does not turn off?
Short-term - yes, but this is emergency mode. Long-term operation without stopping (more than a day) leads to overheating of the compressor windings and its combustion. If you have not eliminated the cause (for example, super-freezing mode), it is better to turn off the device until the technician arrives.
Why does the refrigerator freeze but does not turn off?
Most likely, the thermostat (thermostat) or temperature sensor is faulty. The unit has already reached the required cold, but the “brain” does not receive a signal about this and continues to drive the compressor. This is dangerous due to freezing of food and wear of the motor.
What to do if after defrosting the refrigerator does not turn off?
If you defrosted a refrigerator with a system No Frost and did not allow it to dry for 24 hours, moisture could get into the electrics. The cycle could also be disrupted. Try defrosting the unit completely (at least 24 hours with the doors open) and turning it on again. If it doesn’t help, the problem is in the defrost sensor or thermostat.
How to check whether the compressor is holding pressure?
This can only be done with a pressure gauge on the service fitting. Indirect sign: the compressor is working, the inlet and outlet tubes are hot/cold, respectively, but the chamber is warm, and the condenser at the back is barely warm. This indicates low motor performance.