The situation when an ice crust is actively formed in refrigeration chamber is familiar to many owners of Belarusian equipment. If you notice that Atlant refrigerator freezing on the back wall, this is a signal of a violation of the compressor cycles or problems with the circulation of the refrigerant. Ignoring the symptom can lead to spoilage of products and failure of expensive components.
Often users confuse the natural defrosting process with pathology, but in modern models with a system No Frost or drip system (“Crying wall”) there should be no ice at all, or it should quickly flow into the drainage. Understanding how your model works is the first step to diagnosis. In this article we will analyze specific technical reasons and methods for eliminating them.
The principle of operation of the defrost system and the causes of failures
To understand why it forms snow coat, you need to understand the physics of the process. In classic Atlant models, moisture from the air settles on the coldest area - the rear evaporator. Periodically, the compressor turns off, the evaporator temperature rises, and the ice melts, flowing into the groove. If this cycle is disrupted, the water does not have time to drain and freezes again.
One of the common reasons is incorrect operation thermostat. If it “sticks” in the maximum cold position, the compressor runs without interruption. The back wall freezes through, turning into an ice monolith. In models with electronic control, this process is responsible for the control unit, which can issue erroneous commands due to voltage surges.
⚠️ Attention: Prolonged operation of the compressor without stopping leads to overheating of the motor windings. If you hear a humming sound, but there is no cold, or vice versa - the refrigerator works continuously, forming ice, immediately disconnect it from the network for diagnostics.
It is also worth considering the moisture content of the products. If you put a hot pan in the chamber or poorly closed containers with liquid, the evaporation will be enormous. The defrosting system simply cannot cope with such a volume of moisture, and it is preserved in the form of ice on the back panel.
Diagnostics of drainage system faults
The most commonplace, but common cause of freezing is blockage drainage hole. It is located at the bottom of the rear wall of the refrigerator compartment. Through it, melt water goes into a tray above the compressor. If the hole is clogged with crumbs, mold or ice, the water has nowhere to go, it freezes, forming a snowdrift.
To clean it, you will need a soft wire, a cotton swab or a special brush. You need to act carefully so as not to pierce the thin evaporator tube that runs right behind the plastic. Damage to the tube will lead to freon leakage, which will require expensive repairs with soldering and refilling.
☑️ Cleaning the drainage
Sometimes the problem lies deeper - in the drainage tray itself or the outlet tube inside the case. If ice freezes not only on the wall, but also on the bottom of the refrigerator, the tube in the evaporator area may have frozen. In this case, complete defrosting of the equipment is required within 24 hours.
Problems with the refrigerant and capillary tube
A more serious technical malfunction - clogged capillary tube. This is a thin copper channel through which freon enters the evaporator. Over time, microscopic contaminants or ice plugs may form in the system (if there is moisture in the system). The circulation of the refrigerant is disrupted, the pressure drops, and the evaporator temperature becomes abnormally low.
As a result, the rear wall is covered with an uneven layer of ice, often on one side. The compressor tries to compensate for the lack of cold and runs longer than usual. It is almost impossible to eliminate a clogged capillary on your own; you need to call a technician with specialized equipment to flush with nitrogen and replace the filter-drier.
| Symptom | Probable cause | Nature of freezing | Difficulty repair |
|---|---|---|---|
| Ice all over the wall | Thermostat is faulty | Uniform crust | Low |
| Ice at the bottom of the chamber | Clog drainage | Ice at the hole | Low |
| Ice on one side | Clogged capillary | Uneven layer | High |
| Ice + warm air | Freon leakage | Partial icing | High |
Another option - Freon leak. Paradoxically, if there is a lack of refrigerant, the compressor may work constantly, trying to gain temperature. At the site of the leak or at the beginning of the evaporator, local icing may be observed while the rest of the chamber remains warm.
How to distinguish a blockage from a leak?
When the capillary is clogged, the compressor is often hotter than usual and hums intermittently. If freon leaks, the condenser (grid at the back) may be only partially cold or warm, and the compressor works almost without stopping.
Faults of sensors and electronic module
In modern Atlant models with a system No Frost or electronic control, special sensors (thermistors) are responsible for defrosting the evaporator. If the defrost sensor is faulty and shows incorrect data, the control module may not “see” the ice on the evaporator and may not turn on the heating element to melt it.
As a result, the evaporator in the freezer (which is located behind the rear wall of the refrigerator compartment) becomes overgrown with ice. The cold stops circulating normally, the fan can become jammed with ice, and the refrigerator compartment becomes warm while a lump builds up behind it. It is required sensor testing multimeter and replacement of faulty elements.
The control unit can also “glitch” due to power surges in the network. In this case, the operating algorithms go astray: the compressor turns on chaotically, defrost cycles do not start on time. Sometimes a complete reset or flashing the module helps, but more often it needs to be replaced.
Mechanical damage and wear of seals
Mechanical factors cannot be discounted. If sealing rubber the door is dry, cracked or dirty, warm, moist air constantly enters the chamber. It condenses on the cold back wall and freezes instantly. Check the tightness of the door with a sheet of paper: clamp it around the perimeter - it should be pulled out with force.
It is also worth inspecting the back wall itself for cracks or damage to the plastic. If the thermal insulation of the housing is damaged, intense freezing will occur in this place. In older Atlant models, the plastic of the rear wall could be deformed, creating pockets for collecting water.
⚠️ Attention: If you try to remove frozen food or ice with a knife or sharp objects, damage the cooling circuit. Repair after such damage is often not economically feasible.
Proper defrosting as a method of prevention
If you find a problem, the first step is to properly defrost the unit. Many people make the mistake of turning on hair dryer or placing bowls of boiling water inside. Sudden temperature changes are dangerous for the plastic and solder joints of the evaporator. The best way is natural defrosting.
Unplug the refrigerator, open the doors and leave it for at least 10-12 hours (preferably for a day). During this time, all the ice in the hidden cavities of the evaporator will have time to melt and exit through the drainage. After defrosting, wipe the chamber dry and leave it with the doors open for another couple of hours for ventilation.
After turning on, let the equipment work for 2-3 hours without loading food. If the problem was a temporary failure or minor blockage, operation should return to normal. If ice appears again within 24 hours, the reason lies in a technical malfunction of the components.
Frequently asked questions (FAQ)
Is it possible to operate the Atlant refrigerator if there is some ice on the back wall?
Short-term operation is possible, but undesirable. The constant presence of ice increases the load on the compressor, which leads to increased energy consumption and reduced engine life. In addition, ice reduces the useful volume of the chamber.
Why does ice appear again after a couple of hours after defrosting?
This indicates a system malfunction: either the defrost sensor does not work, or the capillary system is clogged, or there is a freon leak. In such cases, simple defrosting gives only a temporary effect; a technician needs to diagnose it.
Does it need to change freon if the refrigerator just freezes?
Not necessary. Freon replacement is required only if there is a confirmed leak. If the system is sealed, but the capillary tube is clogged, the freon is not changed, but the system is purged and the filter-drier is replaced.
How often do you need to defrost the Atlant refrigerator to avoid ice?
Models with manual defrosting require turning off once every 3-6 months. Models with the “Crying Wall” or No Frost system do not require defrosting, but preventive shutdown once a year for washing and checking drainage will extend the life of the appliance.