The situation when a refrigerator Atlant stops freezing in the upper compartment is one of the most common complaints from the owners of this equipment. Users often notice that the food in the freezer has begun to deteriorate, the ice is melting, and the unit itself works almost without interruption or, conversely, turns on too rarely. This problem can be caused by both trivial reasons such as incorrect installation, and serious technical malfunctions that require the intervention of a specialist.
Understanding the operating principle of your model is the first step to fixing the problem. In two-compartment models refrigeration equipment the cold is usually generated in the freezer compartment and then distributed to the refrigerator compartment. If this cycle is disrupted, it is the upper part where fresh food is stored that suffers. It is important not to panic and consistently check all possible options, starting with the simplest ones.
Before disassembling the unit or calling a specialist, it is necessary to carry out an initial diagnosis. Often the problem lies in the little things: a warped door, clogged ventilation holes, or the thermostat settings being accidentally changed. Attentive attention to details will help save time and money, and will also extend the life of your Atlant refrigerator refrigerator Atlant.
Primary diagnostics and simple reasons
The most common reason why the upper chamber stops cooling is due to a violation of the tightness of the circuit. If the rubber door seal is worn out, dirty, or simply does not fit tightly, warm air constantly enters the chamber. The compressor tries to compensate for the loss of cold and works hard, but cannot reach the desired temperature. Check the tightness of the door around the entire perimeter.
The second important aspect is proper operation. If you put a large amount of hot food into the chamber or left the door open for a long time, the temperature inside could rise sharply. In this case, the unit will need time (from several hours to a day) to restore operation. You should not fill the refrigerator with food to capacity, this disrupts air circulation.
It is also worth paying attention to the location of the unit. If the refrigerator is located close to a wall or in a niche, the radiator on the rear wall cannot effectively transfer heat. For normal operation, a gap of at least 5-10 cm from walls and furniture is required. Overheating of the compressor can cause the system to simply stop coping with the load, and the upper chamber will stop freezing.
⚠️ Attention: If you notice that the compressor has been running continuously for more than 12 hours, and the temperature in the upper chamber does not drop below +10°C, immediately unplug the device. Long-term operation in this mode can lead to motor combustion.
Malfunctions of the defrost system (No Frost)
In models with the system No Frost or Frost Free a problem with cooling the upper chamber is often is associated with ice freezing on the evaporator, which is hidden behind a plastic panel. If the defrost system fails, the ice coat blocks the ventilation ducts, and cold air simply does not enter the refrigerator compartment. In this case, it may be cold in the freezer, but the circulation is impaired.
The main culprits in this situation are the defrost heating element, defrost sensor or timer. The heating element may burn out and stop melting the ice, and the sensor may incorrectly read the temperature without starting the defrost mode. As a result, the evaporator becomes covered with ice, the fan hums, but air does not flow through. This is a classic malfunction for equipment that is already several years old.
How to check the defrosting system without disassembling?
Turn on the refrigerator and listen. If you hear the fan hum, but no cold air is blowing from the holes in the back wall of the upper chamber, the ducts are most likely clogged with ice. Another sign may be the absence of periodic clicks and the sound of dripping water, which are heard during normal operation of the defrost system.
For an accurate diagnosis, you need to call a technician or have the skills to work with a multimeter, since you will need to “ring” the circuit of the heating element and sensors. Independent complete defrosting (for 10-12 hours) can temporarily solve the problem, but if the cause is a broken part, after a week the ice will block the system again.
Problems with the thermostat and sensors
The thermostat (thermostat) is the “brain” that commands the compressor to turn on and off. If it is faulty, the refrigerator may “think” that the chambers are already cold enough and not start the cooling cycle. In models Atlant with mechanical control, the capillary tube of the thermostat itself or its contacts often fails.
In modern models with electronic control, sensors (thermistors) are responsible for the temperature. If the upper chamber sensor shows incorrect data (for example, it underestimates the actual temperature), the control board will not give a command to cool. Replacing such an element requires disassembling the inner casing or access to the rear wall.
Symptoms of a broken thermostat or sensor often include:
- ❄️ The compressor does not turn on at all, the refrigerator is warm and dark.
- ❄️ The unit works without stops, but the temperature in the upper chamber is higher than normal (+10...+15°C).
- ❄️ There is no “tear” (condensation) on the back wall of the refrigerator compartment, which indicates insufficient cooling of the evaporator.
Freon leak and problems with the compressor
One of the most serious reasons why the upper chamber does not freeze is a refrigerant (freon) leak. Two-chamber refrigerators Atlant often use one cooling circuit. When there is a gas leak, the pressure in the system drops, and the freon simply does not reach the evaporator in the freezer or does not pass through it enough to cool the upper compartment.
Signs of a freon leak are quite specific. The compressor may be running constantly, trying to build up the temperature, but the radiator grille at the back remains cold or barely warm. In some cases, you can hear hissing or see oily spots near the pipe connections. Refrigerant leakage This is not just a loss of cold, it is a risk of compressor failure due to dry operation.
It is also worth mentioning problems with the compressor itself. If the motor hums, clicks, but does not start, or starts and immediately turns off, the piston group may be jammed or the winding may be burned out. In this case, the refrigerator will not be able to generate cold in any of the chambers, but sometimes (when performance drops), it is the upper compartment that suffers first.
| Symptom | Probable cause | Difficulty of repair |
|---|---|---|
| The compressor is silent, there is no light no | Thermostat or start relay is faulty | Low |
| Humming constantly, no cold | Freon leak or clogged capillary | High |
| There is ice in the freezer, it’s warm on top | No Frost system malfunction (heating element, timer) | Medium |
| Clicks and turns off | Malfunction of the compressor or start-up relay | High |
Clogged capillary tube
Another technical malfunction typical of refrigerators that have been in use for a long time is a clogged capillary tube. Not only freon circulates in the system, but also oil, and oxidation products or moisture may also be present. Over time, a plug forms in the narrow part of the tube (capillary), preventing the circulation of the refrigerant.
When clogged, the compressor works with increased load, trying to push gas, but the cooling capacity drops sharply. Often in such cases, the condenser (grid at the back) is hot only at the beginning or, conversely, completely cold. Capillary blockage requires professional cleaning or replacement of the filter-drier and refilling the system.
It is impossible to fix this problem on your own, since it requires evacuation of the system and charging with freon under pressure. Attempts to “break through” the blockage by heating can lead to depressurization of the solder or damage to the compressor.
⚠️ Attention: Never try to solder refrigerator tubes yourself without the appropriate equipment and skills. Using unsuitable solder or a burner can lead to an insulation fire or an explosion of freon vapor.
Diagnostic features of Atlant models
Refrigerators Atlant have their own design features. For example, in models of the KShD series (two-compressor), different motors are responsible for the upper and lower chambers. If you have just such a model and the top does not freeze, then the problem is localized exclusively in the circuit of the upper chamber (its compressor, thermostat or leak in this circuit).
In single-compressor models (KSh, KS series) the situation is more complicated, since there is only one circuit. It is important here to check the operation of the damper (if your model has one), which regulates the upward flow of cold air from the freezer. The mechanical damper could be stuck in the closed position, or the electronic drive could fail.
☑️ Diagnostics before calling a technician
It is also worth considering the age of the equipment. Older models Atlant (produced more than 10-12 years ago) are characterized by wear of rubber seals and a natural loss of compressor performance. In such cases, repairs may not be economically feasible compared to purchasing new equipment.
When you need to call a technician
If simple methods like defrosting during the day did not help, and you are convinced that the thermostat is working (or you turned it to the maximum position, but there is no response), professional repairs will most likely be required. This is especially true when it is necessary to replace a compressor, search for a freon leak, or replace a defrost heating element.
The technician has the necessary tools: a leak detector, a vacuum pump, a pressure gauge station. Only with their help can you accurately determine the pressure in the system, the presence of non-condensable gases and the tightness of the circuit. Independent repair of complex equipment Atlant without experience often leads to higher restoration costs.
In addition, professional repairs provide a guarantee. If you replace a part yourself and it burns out within a week, there will be no one to blame. Service centers provide a guarantee on work and spare parts, which is important for expensive components such as a compressor or electronic control module.
Frequently asked questions (FAQ)
Why, after defrosting, does the Atlant refrigerator still not freeze on top?
If complete defrosting (24 hours with the doors open) did not help, then there is a reason not in an ice jam. Most likely, one of the components is faulty: the thermostat does not give the command to turn on, the defrost heating element has burned out and the ice is growing again very quickly, or a freon leak has occurred. Further instrumental diagnostics are necessary.
Is it possible to operate the refrigerator if the upper chamber does not freeze?
Short-term - yes, if the compressor does not work non-stop. However, you will not be able to store perishable food in the top compartment. Long-term operation with a malfunction (especially if the compressor threshes without stopping) will lead to its overheating and final failure, which will make repairs much more expensive.
How much does the repair cost if the cold in the upper chamber has disappeared?
The cost depends on the breakdown. Replacing the thermostat or sensor will cost the least. Freon refilling and leak detection are average in terms of cost. Replacing the compressor is the most expensive option, which sometimes amounts to 50-60% of the price of a new refrigerator.
How to understand that the problem is in the Atlant thermostat?
Classic sign: the refrigerator turned off and does not turn on again, it’s warm inside. If you tap on the control knob or the thermostat itself, it may click and start. Also, the thermostat is often to blame if the refrigerator “does not turn off” and freezes too much (or stops freezing if the contacts are burnt).