The situation when freezer compartment properly freezes food, turning water into ice in a matter of hours, while in the main compartment it is hot or the temperature stays above +10°C, is a classic problem for two-compressor and single-compressor models. Atlant. This phenomenon often takes you by surprise, since the hum of the compressor and the cold on the back wall of the freezer create a false impression that the unit is in full working order. However, the internal logic of the refrigeration circuit is broken, and ignoring this signal can lead to spoilage of a large number of products.
The reasons for this imbalance lie in the specifics of refrigerant circulation or cold air distribution, which depends on the type of your model. Atlant. In systems with a single compressor, the cold is distributed among different circuits, and a failure in one does not necessarily stop the other. In systems No Frost the problem most often lies in a mechanical obstruction to air flow, and not in a freon leak, which makes the diagnosis more optimistic for the owner.
Before calling a technician, it is necessary to conduct an initial diagnosis to understand the scale of the problem. Often the solution lies in simple things like defrosting or checking the settings, but sometimes serious repairs and replacement of parts are required. Understanding the operating principle of your specific model will help you avoid unnecessary costs and quickly bring your equipment back to life.
⚠️ Attention: If you notice that the back wall of the freezer is covered with a thick coat of ice, and the refrigerator compartment is warm, immediately defrost the unit within 24 hours. Further operation in this mode will lead to failure of the compressor due to overheating.
The principle of operation and distribution of cold in different Atlant models
To understand why refrigeration compartment it stopped cooling, you need to understand the architecture of your device. Models Atlant are divided into two main groups: with a drip defrosting system (crying wall) and a system No Frost. In drip models, the cold is transferred through the walls of the evaporator, located inside the chamber or behind the rear panel. If the compressor is working, but there is no cold, it means that the heat exchange or circulation of the refrigerant in this particular circuit is disrupted.
In systems No Frost cold is generated in a hidden evaporator, usually located in freezer, and then the fan forces cold air into the upper compartment through special channels. If the freezer is running, the compressor and main cooling circuit are working properly. The problem is localized in the air supply system: either the fan is not working, or the channels are frozen and clogged with ice, or the damper that regulates the flow is stuck in the closed position.
There are also two-compressor models, where each chamber is responsible for its own independent unit. In this case, the phrase “the freezer is working” means that one compressor is working, and a problem with the refrigeration compartment indicates a breakdown of the second circuit or its control electronics. Here the reasons may be more serious, including a freon leak in the second circuit.
No Frost system: problems with defrosting and fan
The most common reason for the situation when the freezer freezes, but the refrigerator is warm, in models Atlant No Frost is a malfunction of the evaporator defrost system. Over time, a coat of ice builds up on the hidden evaporator. In normal operation Defrost heating element periodically it turns on and melts this ice. If the heating element has burned out, the thermal fuse has burned out, or the defrost sensor has failed, the ice does not melt, but grows.
An overgrown ice ball gradually blocks the channels through which the fan should supply cold air to the upper chamber. As a result, the fan may even hum, trying to expel air, but physically cannot do this due to the ice blockage. At the same time, the freezer continues to cool, since the source of cold (evaporator) is located there, and its own temperature is enough for it, which does not require active circulation.
Diagnostics requires disassembling the rear panel of the freezer. It is necessary to visually assess the amount of ice on the evaporator. If it is completely hidden under a shell of ice, and the fan is clean, the problem is in the defrost units. Often it is the defrost sensorthat does not give the command to turn on the heater that fails, or the heating element itself, the resistance of which must be in a certain range.
☑️ Checking the No Frost system
Faults in models with one compressor
In single-compressor models Atlant the refrigerant passes sequentially through both circuits or is distributed through a magnetic valve. If the freezer is running great but the refrigerator compartment is warm, this often indicates a switching problem or partial loss of performance. One of the key elements here is solenoid valvewhich directs freon to the desired circuit.
If the valve sticks in the “freezer” position, the cold agent simply does not reach the upper compartment. This can happen due to contamination of the system with oil breakdown products or wear of the valve itself. It is also worth checking the filter drier: if it is clogged, the throughput of the system drops, and there is only enough cold for the first section of the circuit (freezer), and the freon no longer reaches the refrigerator compartment at the required temperature.
Another reason may be incorrect operation of the thermostat or electronic control module. If the temperature sensor in the refrigerator compartment “lies” and shows that it is already cold there, the compressor will turn off too early, not having time to cool the volume of the upper chamber. In this case, the freezer, which has a smaller volume and better insulation, manages to freeze, but the large space of the refrigerator does not.
⚠️ Attention: Replacing the solenoid valve yourself requires vacuuming the system and charging it with freon. Without special equipment, it is impossible to perform this operation efficiently, so if you suspect a valve, it is better to turn to professionals.
How to check the solenoid valve?
To check the valve, you need a multimeter in resistance measurement mode. The normal winding resistance of an Atlant valve is usually between 1200 and 1400 ohms. If the device shows an open circuit (infinity) or a short circuit (close to zero), the valve is faulty and requires replacement. You can also apply 220V voltage to it (for a short time!) and listen for a characteristic click, but this must be done with caution.
Problems of two-compressor Atlant refrigerators
Two-compressor models Atlant are considered more reliable in terms of independence of circuits, but they also have characteristic breakdowns. If one compressor is working (a hum is heard, the heat of the condenser is felt), and the second is silent, and the corresponding chamber is warm, the problem may be in the start-protection relay or the motor itself. However, if the compressor of the refrigeration compartment hums, but does not cool, the situation is more complicated.
A frequent cause is freon leak it is in the second circuit. Unlike No Frost systems, where a leak often stops the entire cycle, here a situation may occur where the pressure in the refrigeration chamber circuit has dropped, but the compressor continues to idle. This can be determined by the fact that the condenser (grid at the back) remains cold or barely warm, although the compressor is hot.
It is also worth paying attention to the thermostat. In dual-compressor models there are two of them. If the refrigerator thermostat is faulty and does not close its contacts, the compressor simply will not receive a command to turn on. Check whether the light inside is on when the door is opened (this is an indirect sign of the presence of voltage), and whether the thermostat motor is spinning, if it is mechanical.
Fault diagnosis table
To make it easier to find the problem, we suggest using a summary table. It will help compare symptoms with probable causes. Remember that only a specialist with equipment can make an accurate diagnosis, but the table will allow you to understand the approximate vector of repairs and the cost of work.
| Symptom | Probable cause | Difficulty of repair | Necessary parts |
|---|---|---|---|
| The freezer is freezing, the refrigerator is warm, there is ice on the back wall of the freezer | Malfunction of the defrost system (heating element, sensor, fuse) | Medium | Heating element, defrost sensor, thermal fuse |
| The refrigerator compartment compressor does not turn on | Thermostat or start relay is faulty | Low | Thermostat, start relay |
| The compressor is humming, but it is cold no, the condenser is cold | Freon leak or capillary tube clogged | High | Freon, filter drier (sealing required) |
| The fan does not make noise, although it should | Fan motor burnt out or iced up | Low | Fan |
Algorithm for self-diagnosis and defrosting
If you are faced with the problem described, the first and safest step is always complete defrosting. Even if ice is not visually visible, it may be inside the system channels No Frost. Unplug the refrigerator, open all doors and leave it for at least 12, or preferably 24, hours. Do not use a hairdryer or hot water to speed up the process - this can damage the plastic and seals.
After defrosting, turn on the unit and let it work for 5-6 hours without loading food. If the cold appeared and the system worked normally, then the problem was an ice jam. However, this is a temporary solution: if the heating element or sensor is faulty, after 1-2 weeks history will repeat itself. If after defrosting the situation has not changed, you will need to test the electrical circuits with a multimeter.
When checking with a multimeter, be sure to de-energize the device. Check the integrity of the defrost heating element, the resistance of the sensors and the operation of the fan. If you do not have skills in working with electrical appliances, it is better to stop at the diagnostic stage and call a specialist, since incorrect assembly can lead to a short circuit.
When Calling a technician is necessary and preventive maintenance
A call to a professional technician is necessary if diagnostics indicate a refrigerant leak, a clogged capillary system, or a compressor failure. These works require a vacuum pump, a pressure gauge station and a supply of freon. Independent attempts to refuel "by eye" or use cans to refuel household air conditioners for refrigerators Atlant are unacceptable and will lead to final failure.
Also, the help of a specialist is needed if, after defrosting, the problem returns after a short period of time (3-7 days). This is a sure sign that the defrost unit (heating element or sensor) requires replacement. Operating the refrigerator in constant frozen mode results in the compressor working non-stop, consuming maximum electricity and quickly wearing out.
To prevent such problems, regularly check the door seals - if they allow warm, moist air to pass through, ice will build up faster. Do not place hot food inside and ensure that food does not block the ventilation openings at the rear of the compartments. Following these simple rules will prolong the life of the cooling system.
Why did the refrigerator work after defrosting, but after a week it stopped cooling again?
This is a classic sign of a malfunction in the automatic defrosting system. The ice melted during the long shutdown, the channels became free, and the cold returned to the chamber. However, since the heating element or sensor does not work, the new condensate froze again and after a week blocked the channels again. The faulty element needs to be replaced.
Is it possible to operate the refrigerator if only the freezer is working?
For a short time - yes, if you need to store frozen food. However, the compressor will work harder, trying to reach the temperature in the upper compartment, which will lead to overheating and increased energy consumption. Long-term operation in this mode is not recommended.
How much does it cost to repair a defrost system in Atlant?
The cost consists of the price of spare parts (heating element, sensor, fuse) and the work of the technician. This is usually a medium-priced repair that does not require complex equipment other than a multimeter and screwdrivers. It is better to check the exact amount at the service centers in your region, since prices for components may vary.
How to distinguish a freon leak from an electronics malfunction?
If there is a freon leak, the capacitor (the grille at the back) often remains cold or only partially warm, and the compressor can work constantly or be turned off by a thermal relay. If the electronics (sensors, thermostats) malfunction, the compressor may not turn on at all or turn on at the wrong time, while the defrosting system may be working properly.