Detection of an ice crust on the back wall of the refrigerator Atlant often becomes an unpleasant surprise that requires immediate intervention. Equipment owners are faced with the fact that food freezes to the shelves, and the usable volume of the chamber is rapidly decreasing due to ice. This phenomenon is typical for both older single-compressor models and more modern versions with the system No Frost, although the reasons may differ radically.
The problem is based on an imbalance between the humidity of the air inside the chamber and the temperature of the evaporator. When this balance is lost, the moisture does not have time to evaporate or be removed, turning into a dense layer of ice. Normal operation The unit requires periodic thawing, but if the ice is constantly growing, it means that one of the system nodes has failed or is not working correctly.
Ignoring this problem can lead to to compressor failure due to overload or food spoilage. Understanding the physics of the process will help you quickly diagnose a breakdown and choose the right repair method. Below we will analyze in detail the main factors influencing the formation of ice.
The principle of operation of the defrost and evaporator system
To understand why icing occurs, it is necessary to understand the basic principle of operation of the refrigeration circuit. In models Atlant with a drip system (Direct Cool), the rear wall is an evaporator. During operation of the compressor, it becomes covered with a thin layer of frost, which condenses moisture from the air. When the motor stops, the wall heats up and condensate flows into the drainage tray.
If this cycle is disrupted, the water does not have time to drain and freezes. In systems No Frost ice forms on a hidden evaporator behind the rear panel, and cold air is forced by a fan. Here, the freezing of visible ice on the walls of the chamber indicates problems with air circulation or defrost sensors.
Technical information
How does the defrost cycle work?: In Atlant refrigerators, the defrost cycle is initiated by a timer or an electronic module. After a certain number of hours of operation of the compressor, the heating element (heating element) is turned on, which melts the ice on the evaporator. If the heating element is burnt out or the timer is jammed, the evaporator becomes overgrown with ice and stops cooling the chamber effectively.
It is critically important to monitor the condition evaporatoras its fouling with ice reduces heat transfer. The compressor is forced to work without interruption, trying to reach the set temperature, which leads to its premature wear. In some cases, an ice “coat” can mechanically damage the tubes or clog the air channels.
Failures of the thermostat and temperature sensors
One of the most common reasons for the formation of a “snow coat” is the failure of the thermostat. This element is responsible for turning the compressor on and off depending on the temperature inside the chamber. If the thermostat contacts stick in the closed position, the motor runs continuously, causing a deep freeze of everything that falls within its zone of influence.
In models with electronic control, temperature sensors and the air damper are responsible for this process. Incorrect sensor readings lead to the control unit “thinking” that there is heat in the chamber and does not give a command to stop the compressor or turn on the defrost mode.
⚠️ Attention: Replacing the thermostat yourself requires accurate diagnostics. Installing an element with an inappropriate temperature range will either result in constant frost or food spoilage due to insufficient cooling.
To check a mechanical type thermostat, a method of visually inspecting the capillary tube for damage is often used. Electronic systems require testing with a multimeter at different temperatures. A faulty thermostat is the classic reason why ice freezes on the back wall, and it can be solved by replacing the part.
Problems with the door seal and moisture ingress
Tightness of the refrigerator Cameras are the key to proper operation of the entire system. If the rubber door seal is worn out, dirty or deformed, warm and humid air from the room constantly enters the chamber. This moisture condenses on the coldest surface - the back wall, turning into ice. Atlant worn out, dirty or deformed, warm and humid air from the room constantly enters the chamber. This moisture condenses on the coldest surface - the back wall, turning into ice.
Often the problem lies not in the rubber itself, but in the misalignment of the door or weakening of the hinges. Even a microscopic gap leads to active frost formation. You can check the tightness with a simple test with a sheet of paper: clamp the sheet with the door around the perimeter; if it falls out or is pulled out without resistance, the seal is broken.
☑️ Diagnostics of the door seal
Moisture can enter the chamber in another way: if you place hot dishes or do not close containers with liquid tightly. Excessive vaporization overwhelms the drying system. Sealing rubber must be elastic; if it has become hard or cracked, it must be replaced to restore a normal microclimate.
Clogged drainage hole and condensate removal
In refrigerators with a drip moisture removal system (Direct Cool), a critical element is the drainage hole. It is located in the lower part of the rear wall and serves to drain melt water into a tray above the compressor. If this channel becomes clogged with food crumbs, mold or ice, the water has nowhere to go.
As water accumulates, it freezes, forming an ice plug that grows up the wall. Over time, this leads to the formation of a huge ice block, occupying a significant part of the volume. Regular cleaning of the channel is a mandatory procedure maintenance.
| Symptom | Probable cause | Solution method |
|---|---|---|
| Puddle of water at the bottom of the chamber | Complete blockage of the drain | Cleaning with a brush or wire |
| Ice build-up at the bottom of the wall | Partial blockage or freezing of the drain | Defrosting and pouring warm water water |
| Water in vegetable boxes | Displacement of the drain groove | Correct installation of trays |
For cleaning, use the special brushes included in the kit, or soft wire. Do not use sharp metal objects to avoid damaging drainage tube or breaking the tightness of the system. After mechanical cleaning, it is recommended to rinse the channel with warm water to remove any remaining contaminants.
Incorrect temperature setting
Often the cause of icing is trivial and lies in the user settings. If the temperature control is set to "Maximum" or "Super Freeze", the compressor operates at its maximum capacity. In such conditions, the back wall is cooled to extremely low values, which provokes intense freezing of ice even with working equipment.
The optimal mode for the main chamber is considered to be a range from +2 to +4 degrees Celsius. During winter, when the room temperature drops, settings may need to be adjusted. Electronic models Atlant allow you to set exact values, while in mechanical models you need to focus on patterns of snowflakes or numbers.
The seasonal factor should also be taken into account. In summer, when the temperature in the kitchen is high, the refrigerator works more intensely. If at this moment the maximum cold is set, the formation of condensation and ice is inevitable. Temperature conditions must correspond to external conditions and the amount of loaded products.
Technical malfunctions: leakage of freon and defrost heating element
More complex cases are associated with malfunction of system components No Frost or refrigerant leak. If in the air circulation system (in models with No Frost) the defrost heating element, timer or thermal fuse fails, the evaporator becomes overgrown with ice. The fan begins to drive this ice into the chamber, or it simply melts and freezes on the walls.
A freon leak is an insidious malfunction. When the amount of refrigerant decreases, the compressor works longer, trying to compensate for the lack of cold. This leads to deep freezing of moisture. Often during a leak, ice forms unevenly or in specific places, for example, only in the corner of the evaporator.
⚠️ Attention: Diagnosing a freon leak and replacing the heating element requires specialized equipment and skills. An attempt to independently repair the refrigerant circulation system can lead to the final failure of the unit.
Symptoms of technical malfunctions can also be extraneous sounds, the absence of a characteristic gurgle, or, conversely, a constant hum of the engine. If simple methods (defrosting, adjusting the thermostat) do not help, most likely, you need to call a technician to check the pressure in the system and the integrity of the electrical circuits defrost.
Frequently asked questions (FAQ)
Is it possible to scrape ice with a knife to speed up the process?
It is strictly not recommended to use sharp objects to chip ice. The back wall of the refrigerator Atlant contains thin evaporator tubes. One awkward movement will lead to a puncture and an instant leak of freon, after which repairs will become economically unfeasible. Use only safe defrosting methods.
How often do you need to defrost the Atlant refrigerator?
Models with a drip system require defrosting approximately once every 4-6 months, or when the layer of frost exceeds 5 mm. Systems No Frost formally do not require defrosting, but for hygienic cleaning and prevention of bacteria it is recommended to disconnect them from the network once a year.
Why does ice form in only one corner?
Local ice formation often indicates a violation of air circulation (the air duct is clogged), the refrigerator is skewed (the drainage is disturbed condensation) or damage to the seal in this particular area. This may also be a sign of the beginning of a freon leak.
Does the amount of products affect the formation of ice?
Yes, it does directly. A large amount of food with a high moisture content (vegetables, fruits, open pans) increases the humidity in the chamber. If ventilation is impaired or the temperature is set too low, this moisture settles on the back wall in the form of ice.