The situation when freezer compartment properly freezes food, and in the main compartment the temperature rises to room temperature is a classic scenario for the breakdown of two-chamber refrigerators of the brand Atlant. The owner is faced with the fact that vegetables wither, milk turns sour, but the ice in the upper or lower compartment remains solid. This creates a false impression that the unit is working normally, but the cooling system is broken.
Most often, the problem lies not in a complete failure of the motor-compressor, but in a failure refrigerant circulation or a violation of air flow control. In modern models with the No Frost system and older drip versions, the reasons may differ, but the result is the same - lack of cold in the refrigerator compartment. It is important not to ignore the first signs, since prolonged operation in this mode can lead to damage to an expensive compressor.
Diagnostics should begin with simple actions that do not require disassembling the housing, but be prepared for the fact that you will need to call a technician to replace spare parts. The critical factor in 70% of cases is a violation of the evaporator defrost cycle, which leads to the formation of an ice coat that blocks the air supply channels. Understanding the operating principle of your model will help you quickly identify a malfunction and avoid unnecessary costs.
The operating principle of the Atlant two-chamber system
To understand why Atlant refrigerator it stopped cooling in the upper compartment, you need to understand the basic pattern of freon movement. Most models use a single compressor that circulates the refrigerant. First, the gas is compressed and heated, then passes through a condenser (grid at the back), cools and turns into a liquid. After this, it enters the evaporator, where the main cooling process occurs.
In two-chamber models, the evaporator is most often located in the freezer. The cold from it is transferred to the refrigeration compartment either forcibly using a fan (in models No Frost), or due to natural convection and temperature difference (in drip models). If this cold transfer mechanism is blocked, we get a situation: the freezer operates at full capacity, and there is heat from above.
A control system, including a thermostat or an electronic module, must regulate the operation of the compressor and fans. If the sensors transmit incorrect data or the actuators are jammed, the refrigerator cannot maintain the set temperature. An imbalance results in the compressor's resource being wasted, cooling only a small volume of the freezer.
It is important to note that the design Atlantov assumes the presence of special channels for air flow. Any obstacle in these air ducts - be it ice, a foreign object or a faulty damper - instantly disrupts the microclimate in the main chamber, leaving the freezer unaffected.
Malfunctions of the defrost system (for No Frost models)
The most common reason is which Atlant refrigerator poorly freezes in the main compartment when the freezer is running is a failure in the defrosting system. In units with No Frost technology, frost constantly builds up on the evaporator. Periodically, according to a timer, the Defrost heating elementshould turn on, which melts this ice. If this process does not start, the evaporator is completely overgrown with ice.
When the ice coat becomes too thick, it blocks the channels through which the fan should blow cold air into the refrigerator compartment. As a result, the fan may even hum, but the air simply does not pass through the ice plug. The freezer continues to freeze, since the evaporator is located right in it, but the cold does not reach the upper compartment.
⚠️ Attention: If you find that the back wall of the freezer is covered with a thick layer of ice or snow, and the fan is noisy, but does not blow, this is almost guaranteed to be a problem with defrosting. Do not try to pick out the ice with a knife, this may damage the evaporator.
The defrost system includes three main elements, failure of any of which leads to the problem described. It is necessary to check:
- 🔥 A defrost heating element —a heating element that could have burned out.
- ⏱️ A defrost timer or an electronic control module that does not give a command to turn on the heating.
- 🌡️ Defrost sensor (defroster), which could “stick” and not inform the system about the need for defrosting.
For accurate diagnostics, you will need a multimeter to “test” the circuits. Often it is the heating element or sensor that burns out, since they operate in an aggressive environment with changes in temperature and humidity. Replacing these parts usually solves the problem, but requires partial disassembly of the freezer. Atlant refrigerators It is the heating element or sensor that burns out, since they operate in an aggressive environment with changes in temperature and humidity. Replacing these parts usually solves the problem, but requires partial disassembly of the freezer.
Problems with the air damper and fan
In models that use forced air circulation, a special one is responsible for the distribution of flows air damper. This is a mechanical or electromagnetic curtain that opens based on a signal from the thermostat to release cold into the refrigerator compartment. If the damper is stuck in the closed position, cold air remains in the freezer, and there is heat on top.
Jamming can occur due to freezing of the damper itself or a breakdown of its drive. In electronic models Atlant the drive is controlled by a motor, which may fail over time. In simpler versions, the damper is controlled by a thermostatic element, which loses its properties or breaks.
In addition to the damper, the fan plays an important role. If its impeller is contaminated with dust or frozen ice, the speed drops and the air pressure is not enough to overcome the resistance of the air ducts. The winding of the fan motor may also burn out, which will lead to a complete stop of circulation.
Checking the operation of the damper often requires a visual inspection. You need to remove the decorative panel in the refrigerator compartment (usually at the top of the back wall) and see if the mechanism moves when you change the temperature settings.
How to check the damper without disassembling?
Open the refrigerator door and listen. If you do not hear the characteristic sound of the fan or air movement when you close the door, the damper may be closed or the fan is not working. You can also bring a thin strip of paper to the opening of the air duct - it should be attracted by the air flow.
Freon leakage and clogged capillary tube
If the defrost system and dampers are working properly, but Atlant refrigerator still does not freeze in the upper compartment, the problem may lie in refrigeration circuit. The two main technical malfunctions here are a leak of refrigerant (freon) or a clogged capillary tube.
When freon leaks, its quantity in the system becomes insufficient for a full cooling cycle. The gas goes all the way around, but evaporates too quickly before reaching the end of the evaporator. As a result, the first part of the evaporator (closest to the freezer) is cold, and the last part (in the refrigerator compartment) is warm. In this case, the compressor can work without stopping, trying to gain temperature.
The capillary tube is clogged due to moisture or debris entering the system. This creates a plug that prevents circulation. The symptoms are similar to a leak: the freezer freezes poorly or normally, but the refrigerator compartment is warm. Only a master can distinguish these conditions by pressure in the system and temperature in different parts of the circuit.
| Symptom | Freon leak | Clogged capillary tube | Normal |
|---|---|---|---|
| Compressor operation | Works without stopping | Works with overheating, can be turned off by thermal protection | Cyclic on/off |
| Condenser temperature (grids) | Warm only at the beginning, then cold | Hot, uneven heating | Evenly warm along the entire length |
| Evaporator | Partially frozen (just the beginning) | May be covered with frost uneven | Uniform layer of frost (or clean in No Frost) |
It is impossible to eliminate these faults on your own. Specialized equipment is required to find leaks, evacuate the system and charge with new refrigerant. Attempts to simply “add gas” without eliminating the cause of the leak will only give a temporary effect.
☑️ Symptoms for calling a technician
Compressor malfunction and loss of performance
Although the compressor is the “heart” refrigerator, its complete stop usually leads to defrosting of both compartments. However, there is a scenario when motor-compressor loses its performance. The piston group wears out, the valves burn out or lose their tightness, and the compressor is not able to create the necessary pressure to pump freon through the entire circuit.
In this case, the freon circulates, but its pressure is only enough to cool the evaporator in the freezer. The refrigerant reaches the refrigerator compartment either warm or not at all. In this case, the compressor may hum, vibrate and be very hot, but not perform useful work.
Another rare but possible reason is air leakage through a leak in the suction pipe. This upsets the balance of the system and reduces cooling efficiency. Compressor diagnostics require measuring current consumption and outlet pressure. If the current is low and the pressure does not increase, the compressor “does not pull.”
⚠️ Attention: If the compressor gets very hot (more than 90 degrees) and turns off after 10-15 minutes of operation, and then does not turn on for a long time, this is a sign of overheating and a possible malfunction of the starting relay or the motor itself. Operation in this mode poses a fire hazard.
Replacing a compressor is a complex and expensive process that requires resoldering of copper tubes, evacuation and precise filling with oil and freon. In older models Atlant sometimes it is cheaper to buy a new refrigerator than to change the motor.
The influence of the thermostat and electronics
The thermostat (thermostat) or an electronic control unit is responsible for turning the compressor on and off. If thermostat it is faulty and “lying”, it can turn off the compressor ahead of time, “thinking” that the chamber is already cold enough. Since the sensor is often located in the freezer area or on the evaporator, it detects the cold there and gives a command to stop, ignoring the heat in the main chamber.
In electronic models Atlant with a display on the side or inside, a problem can be caused by a failure in the control module. Oxidation of contacts, a power surge in the network, or failure of the temperature sensor in the refrigerator compartment lead to incorrect operation of the entire system. The electronics simply “do not know” that the cooling needs to be turned on.
Often users accidentally reset the settings by switching the refrigerator to the “Vacation” or minimum cooling mode. In this mode, the freezer runs and the refrigerator compartment turns off to save energy. Check the settings on the control panel.
Mechanical thermostats are characterized by “sticking” contacts or loss of bellows sensitivity. You can check it by shorting the wires directly (for diagnostics). If after the short circuit the refrigerator works normally, the thermostat is to blame. In electronic models, diagnostics of error codes are required, which can be displayed by blinking indicators.
Mechanical damage and human factor
Do not forget about simple things. Sometimes the reason why it doesn't freeze on top is trivial. For example, food may be packed so tightly that it blocks the air duct outlets. In No Frost models, this is critical - the air must circulate freely. Atlant refrigerator It doesn’t freeze on top, it’s banal. For example, food may be packed so tightly that it blocks the air duct outlets. In No Frost models this is critical - the air must circulate freely.
The door may also not be tightly closed. If the seal (elastic band) is worn out, dirty, or the door is warped due to improper installation, warm air constantly enters the chamber. The cooling system cannot cope with the heat flow, and in the upper part, where the temperature is naturally higher, the products begin to deteriorate.
Check the seal around the perimeter. It should be elastic and fit snugly to the body. Wipe it with soapy water. If there are gaps, try warming the elastic with a hairdryer or replacing it. Also make sure that the refrigerator is level and the doors close under their own weight.
Another factor is the placement of the refrigerator. If it stands close to the wall or in a niche without gaps for ventilation, the condenser does not have time to cool. This reduces the efficiency of the entire system, and there is no longer enough cold in the main chamber.
Why, after defrosting, did the refrigerator stop freezing again after a couple of days?
This is a classic symptom of a malfunction of the defrosting system. When you defrost a refrigerator manually, you remove the ice plug and air begins to circulate again. But if the heating element, timer or defrost sensor is broken, the ice will begin to build up again. After 3-7 days (depending on humidity) it will block the channels again and the problem will return. The faulty element of the No Frost system needs to be replaced.
Is it possible to operate the refrigerator if only the freezer freezes?
For a short time - it is possible, but not recommended. The main problem is that the compressor will work almost non-stop, trying to cool the upper chamber. This will lead to overheating and rapid wear. In addition, the food in the refrigerator compartment will spoil. It is better to temporarily move the products to a cool place and do the repairs.
How much does the repair cost if the defrost heating element burns out?
The cost consists of the price of the spare part and the work of the technician. The heating element itself for Atlanta is relatively inexpensive. However, the replacement job requires defrosting, removing panels in the freezer, and diagnostics. In service centers, such a service usually falls into the middle price segment of repairs. It is better to check the exact amount with the specialist after diagnosis, since prices may change.
How can you tell that the system has run out of freon?
If there is a freon leak, the compressor runs constantly or for a very long time, but does not turn off. In this case, the condenser (grid at the back) will be warm only in the first third (near the compressor), and the rest will be cold. In the freezer, only a small “fur coat” may appear in the corner, but the main volume will be warm. Only a specialist with a manometric manifold will make an accurate diagnosis.