The situation when Atlant refrigerator stops turning off and works without interruption is one of the most alarming for owners of household appliances. A motor-compressor humming around the clock not only irritates the ear, but also indicates a serious malfunction in the thermoregulation system. If you ignore this symptom, the resource of an expensive unit may be exhausted in a matter of months, and the electricity bill will increase significantly.
The first thing the owner needs to do is conduct an initial diagnosis to understand the scale of the problem. Often malfunction the problem lies not in a breakdown of the compressor itself, but in a violation of the tightness of the circuit or an electronics failure. It is important to distinguish between the normal mode of operation when loading products for the first time and an emergency situation that requires the intervention of a technician.
In this article we will analyze in detail all the possible reasons why refrigerator does not reach the set temperature condition. You will learn how to test sensors, find freon leaks and determine a thermostat malfunction without calling a specialist to your home. Understanding the principles of operation refrigeration equipment will help you save time and money.
Tightness failure and refrigerant leakage
The most common and dangerous cause of continuous compressor operation is freon leak. The refrigerant circulates in a closed circuit, removing heat from the chambers and releasing it into the environment. If a microscopic hole appears in the system, the pressure drops and the compressor begins to drive the remaining gas in an attempt to reach the desired temperature, but to no avail.
Usually a leak occurs in places where pipes are soldered or due to corrosion of the evaporator, especially in models with a system No Frost "crying" wall. It is difficult to visually detect the location of the leak, but you can notice that the back wall of the refrigerator compartment is no longer covered with frost or, conversely, has become swollen. Also, the condenser (grid on the back) may feel cold or only partially warm to the touch.
⚠️ Attention: If you hear hissing or see oily spots under the refrigerator, immediately unplug the appliance. Further operation of the compressor on freon residues without lubrication will lead to its wedge and expensive replacement.
To eliminate this problem, a professional is required diagnostics using a leak detector. The technician will find the location of the damage, seal it and charge the system with new refrigerant. It is impossible to eliminate the leak on your own, since this requires a vacuum pump and a pressure gauge station.
How long does freon last in a refrigerator?
Freon is an inert gas that can theoretically circulate in the system for decades. It is not consumed like fuel in a car. If the system is sealed, refueling is never required. The need for refueling always means there is a hole in the circuit that needs to be found and fixed.
Malfunctions of the thermostat and temperature sensors
The thermostat (thermostat) is the “brain” that commands the compressor to turn on or off. Older models Atlant use a mechanical thermostat with a bellows tube that responds to temperature changes. If the contacts inside stick in the “on” position, the motor will work continuously.
In more modern models with electronic control, the role of a thermostat is performed temperature sensors. They transmit signals to the control module. If the sensor “lies” and shows that the chamber is +10°C instead of the real +4°C, the electronics will force the compressor to work to the bitter end, trying to cool the chamber to non-existent values.
You can check a mechanical thermostat by temporarily closing its contacts (for experienced users). If after this the compressor stops humming when the door is open, then the problem is in the regulator. Electronic sensors are checked with a multimeter for resistance, which should change depending on the temperature.
Problems with sealing rubber and chamber tightness
Often the reason that refrigerator does not turn off is trivial and lies in a loose fit doors. The sealing rubber dries out over time, cracks, or simply becomes contaminated with grease and crumbs. Through the resulting cracks, warm air constantly enters the chamber, forcing the unit to work in enhanced mode.
You can check the tightness with a simple test with a sheet of paper. Clamp the sheet between the door and the body around the entire perimeter. If the paper comes out too easily or falls out on its own, it means the pressure is insufficient. Also pay attention to the hinges: if the door is skewed, there will be no tight contact even with new rubber.
You can restore the elasticity of the seal by heating it with a hairdryer or pouring boiling water over it, but this is a temporary measure. If the rubber is cracked or has lost its shape, it is necessary Replace. The new tape will provide perfect insulation, and the compressor will begin to shut down according to the cycle.
| Symptom | Possible cause | Check method |
|---|---|---|
| The refrigerator is humming, but does not cool | Freon leak | Checking the pressure in the system |
| The compressor is hot, does not turn off | Thermostat is faulty | Thermostat contacts are closed |
| Increasing “fur coat” in one corner | The seal is damaged | Test with a paper sheet |
| The sound of flowing liquid is heard | Clogged capillary tube | Analysis of the system operation |
Clogged capillary tube or filter drier
There is a bottleneck in the freon circulation system - the capillary tube. Through it, the refrigerant under high pressure enters the evaporator, where it expands sharply and cools. If there is moisture or oxidation products in the system, clogging (often an ice plug in the filter drier) may form.
When clogged, the compressor tries to push freon, working with overload, but the cooling capacity drops. A characteristic sign is that the condenser (grid at the back) may only be hot at the beginning, while the rest is cold. There may also be swelling of the rear wall inside the refrigerator compartment.
Removing the blockage requires purging the system with high pressure nitrogen and replacing the filter drier. This is a complex technical procedure that cannot be performed without special equipment. Attempts to “break through” the blockage on your own can lead to rupture of the tubes.
Failure of the control module
In modern models Atlant with electronic control (temperature indication on the door), the control module is responsible for all processes. If a relay on the board burns out or a triac that controls the compressor fails, the power circuit may become stuck.
In this case, the compressor receives voltage constantly, regardless of the sensor readings. Diagnostics of the module requires testing the board elements and checking the output signals. Often, traces of burning or swelling of capacitors are visually visible on the board.
⚠️ Attention: Repairing an electronic control module requires knowledge in radio electronics. In most cases, it is easier and more reliable to replace the entire board with an original or compatible one.
Sometimes the failure is software in nature. In such cases, a full reset settings (Hard Reset) can help. To do this, you need to unplug the refrigerator for 15-20 minutes and then turn it on again. If the problem was a glitch in the electronics, the operating mode should be restored.
☑️ Diagnostics before calling a technician
The influence of external factors and improper operation
Before you sin for breakdown, it is worth analyzing the operating conditions. Refrigerator may not turn off if it is installed next to a heat source (battery, stove) or in direct sunlight. In this case, heat exchange is disrupted and the unit cannot effectively cool the condenser.
Loading a large amount of warm food into the chamber may also be the reason. The system simply does not have time to cool the volume, and the compressor wears out. In addition, insufficient clearance between the back wall of the refrigerator and the furniture (less than 5-7 cm) impairs ventilation.
Check whether the minimum temperature is set (Super Freeze mode or -24°C). In this mode, some models Atlant can work continuously for up to 12 hours, which is the norm for quick freezing, but not for continuous use.
Frequently asked questions (FAQ)
Can the Atlant refrigerator work without interruption in the summer?
In the summer, at high room temperatures, the compressor operating cycles actually lengthen, since heat transfer is worse. However, even in the heat of +30°C in the room, a working refrigerator must periodically turn off. If it hums for days, this is a sign of a malfunction, most often a freon leak or loss of tightness.
Is it dangerous to leave a working refrigerator with a malfunction?
Yes, it is dangerous. Working “to wear” leads to overheating of the compressor windings and eventual combustion of the motor. In addition, if the cause is a leak, continued operation may lead to moisture and air entering the system, which will require complex and expensive flushing of the circuit.
Why does the refrigerator not turn off for a long time after defrosting?
Immediately after defrosting, the temperature inside the chambers is high, so the compressor works in increased mode to cool the volume. This is normal and can last from 2 to 6 hours. If after 8-10 hours it does not turn off, then the problem is not defrosting, but a technical malfunction.
How often do you need to change freon in the refrigerator?
Freon is a working fluid in a closed cycle; it is not consumed. It only needs to be replaced or refilled if there is a leak. If the system is sealed, freon lasts the entire life of the refrigerator (10-15 years or more) without human intervention.