The situation when the upper chamber of the refrigerator Atlant continues to cool food, but the ice in the freezer suddenly thaws and the meat spoils, always takes you by surprise. The owner faces the risk of losing the supply of products and the need to urgently find a specialist or do the repairs himself. Most often, the problem lies not in a complete failure of the unit, but in a disruption in the circulation of the refrigerant or a malfunction in the control system.
The first thing that needs to be done is to assess the scale of the problem: is the compressor working at all, is there a light in the chamber and is the defrost indicator on the control panel lit. Diagnostics starts with simple steps that will help weed out false alarms before calling a specialist. In some cases, the equipment simply needs proper defrosting or resetting the temperature regime.
In this article we will analyze in detail the main reasons why the freezer Atlant ceases to perform its functions, and we will explain which components require attention. You will learn how to distinguish a freon leak from a thermostat failure and what to do if the motor-compressor fails. Understanding the principles of operation of a dual-circuit system or a No Frost system will help you make the right decision on further actions.
Primary diagnostics: checking simple causes
Before disassembling the back wall or calling service, it is worth eliminating trivial operating errors. Often, users accidentally change the settings or do not notice that the door has not been tightly closed for a long time. If the compressor is humming, but there is no cold, check whether the ventilation inside the chamber is blocked by food.
Pay attention to the position of the temperature regulator. In two-compressor models Atlant a separate thermostat is responsible for the freezer, usually located inside the chamber itself or on the top panel. If it is at a minimum, the equipment simply will not be put into operation. It is also worth checking the tightness of the sealing rubber around the perimeter of the door.
The important step is complete defrosting. If you haven't done this in a while, ice may be blocking the air passages or sensors. Unplug the appliance for 10–12 hours with the doors open. This will allow the ice to completely melt and evaporate, and the control system to reset possible errors. After connecting to the network, let the refrigerator work for 5-6 hours without loading food.
Problems with the refrigerant: freon leakage and blockage
One of the most common reasons why a freezer Atlant stops freezing is a refrigerant leak. Freon circulates in a closed loop, and if a microcrack appears in the system, the gas gradually evaporates. Visually, this can be manifested by swelling of the wall inside the chamber or the appearance of oily spots on the rear grille of the condenser.
Signs of a leak are often quiet operation of the compressor or its cyclic switching on at short intervals. The motor is trying to build up pressure, but due to a lack of substance it cannot create the necessary cold. In such cases filling with freon is mandatory, but before this the technician must find and solder the leak, otherwise the gas will come out again after a short time.
⚠️ Attention: An independent attempt to find a leak using soapy water is only possible on accessible external tubes. Internal evaporators, foamed in the housing, require professional equipment to localize the damage.
Another common problem is capillary blockage. An ice or mud blockage could form in the system, which physically blocks the movement of freon. The symptoms are similar to a leak: the compressor works, but there is no cold. Only a specialist can determine the blockage by connecting a pressure manifold and checking the pressure in the circuit. To eliminate this, you need to purge the system with nitrogen and replace the filter-drier.
It is worth noting that modern models Atlant with the No Frost system are more sensitive to the purity of the refrigerant. The presence of moisture in the system leads to the formation of ice plugs in narrow places of the capillary tube, which completely stops cooling.
Faults of the compressor and start relay
The heart of any refrigerator is the compressor. If the motor-compressor Atlant hums but does not start, or turns on for a few seconds and immediately clicks and turns off, the problem lies in the starting mechanism. The starting relay is responsible for providing an impulse to start the engine, and its failure is a frequent and inexpensive breakdown to fix.
In the case when the compressor hums loudly and for a long time, but does not start, a wedge in the mechanical part of the engine or an interturn short circuit of the windings is possible. This is already a serious malfunction that requires replacement of the entire unit. Old models can work with one compressor for two chambers, and its failure will stop the operation of the entire refrigerator, while new dual-circuit systems allow the upper chamber to work independently.
How to check the start relay yourself?
Remove the relay from the contacts of the compressor and shake it. If a ringing or knocking sound is heard inside, it means that the mechanical part is damaged and the relay must be replaced. Also check the contacts for carbon deposits.
Thermal protection relay also plays an important role. It turns off the motor when it overheats. If this unit is faulty, it can open the circuit prematurely, preventing the compressor from reaching operating mode. Replacing these components usually takes little time and does not require complex equipment other than a screwdriver and a tester.
When replacing a compressor, it is important to choose a model with similar power and refrigerant characteristics. Installing a more powerful motor can lead to an overload of the electrical network and rapid failure of the new part.
Failures in the No Frost system and malfunctions of the heating element
If your Atlant is equipped with a No Frost system, then the lack of cold in the freezer when the compressor is running often indicates problems with defrosting. In such models, cold air is forced by a fan through the evaporator. If the evaporator is overgrown with a “coat” of ice, the fan cannot drive the air out, and the chamber stops cooling.
A heating element (heating element), defrost sensor and timer or electronic control module are responsible for the defrosting process. If the heating element burns out, the ice does not melt and blocks the channels. You can check the heater with a multimeter for resistance. The normal value is usually several hundred Ohms, an open circuit indicates a malfunction.
| Symptom | Probable cause | Check method |
|---|---|---|
| Fan does not spin | Frozen blades or motor failure | Visual inspection after removing the rear panel |
| Thick layer of ice on the back wall | Faulty defrosting heating element | Testing the heating element with a multimeter |
| The refrigerator is working without stopping | The defrost sensor is “stuck” in cooling mode | Replacing the sensor or checking the control circuit |
The fan can also fail mechanically. If it is jammed with ice or the bearings are worn out, air circulation stops. In models with a bottom freezer, this leads to rapid defrosting of food, although the compressor itself can operate normally.
☑️ Diagnostics of the No Frost system
Electronic control module and thermostats
In modern refrigerators Atlant with electronic control, the main module is responsible for all processes. If errors appear on the display or indicators blink in a certain sequence, this is a signal of a failure in the “brains” of the device. Power surges in the network often lead to burnout of tracks or microcircuits on the board.
In models with mechanical control, the role of the controller is performed by a thermostat (thermostat). This device opens and closes an electrical circuit depending on the temperature in the chamber. If the thermostat bellows has lost its tightness or the contacts have oxidized, the compressor simply will not receive a command to turn on.
⚠️ Attention: Before replacing the electronic module, make sure that the problem is not in the wiring or oxidized contacts of the connectors. Often it is enough to clean the contacts with alcohol to restore operation.
Temperature sensors (thermistors) transmit information about the current state to the camera. If the sensor in the freezer shows incorrect data (for example, that it is -30°C when in fact it is 0°C), the control module will not turn on the compressor. Replacing the sensor is a simple procedure, but it requires access to the evaporator.
Diagnosing the control module often requires special software and adapters, so if you suspect electronics, it is better to contact specialists. Independent re-soldering of elements on the board is possible only with the appropriate experience and equipment.
Mechanical damage and wear of seals
Even a working refrigerator will not be able to maintain the temperature if the seal of the chamber is broken. The sealing rubber on the door Atlant over time becomes dull, cracks or comes away from the canvas. Through the resulting cracks, warm air constantly flows inside, which the cooling system does not have time to cool.
You can check the tightness of the fit using a sheet of paper. Clamp the sheet with the door around the perimeter: if it comes out too easily or, conversely, with great difficulty in some places, it means that the seal requires adjustment or replacement. It is also worth checking the door hinges - if they are skewed, the tightness is compromised.
Mechanical damage to the body, dents or deep scratches can also cause problems. If the internal plastic is damaged or the structure of the thermal insulation is damaged, the efficiency of the device decreases. In extreme cases, it may be necessary to replace the internal container of the chamber.
Frequently asked questions (FAQ)
Why did the Atlant freezer stop freezing after defrosting?
If after defrosting the cold does not appear within 5-6 hours, the compressor may have soured or an electronics failure has occurred. An ice plug could also form in the capillary if the system was not completely dried. Try leaving the refrigerator turned off for a day.
Is it possible to operate the refrigerator if the upper chamber does not freeze?
In two-compressor models, yes, the lower chamber (freezer) will work independently. In single-compressor systems, operation without cold in one of the chambers indicates a serious malfunction, and further operation may lead to compressor failure.
How long should a new Atlant refrigerator gain temperature?
The first start-up can take up to 12 hours. It is not recommended to load products during this time. If after 12 hours ice has not formed in the freezer or the cold is not felt, then the equipment is faulty.
What does the flashing Alarm indicator on the Atlant refrigerator mean?
The indicator Alarm signals that the temperature in the chamber has risen above the permissible norm. This may be the result of prolonged defrosting, loading a large volume of warm food, or a breakdown of the cooling system. If the indicator does not go out after reaching temperature, diagnostics is required.