Detection of a dense layer of ice or loose snow on the rear inner wall of the refrigerator Atlant is a signal about that the unit has malfunctioned. Under normal conditions, moisture from the air should condense and evaporate without turning into ice. The appearance of a “fur coat” indicates a violation of the temperature regime or the tightness of the circuit.
Ignoring this problem can lead to food spoilage, increased energy consumption and compressor failure. Owners of models with the system No Frost face this less often, but they can also have breakdowns that lead to freezing. In models with a drip system (“crying wall”), ice build-up is a more common occurrence, indicating the need for intervention.
Before calling a technician, it is worth conducting an independent diagnosis. Often the reason lies in improper operation or a simple blockage, which is easy to remove. However, in some cases it will be necessary to replace parts, such as Evaporator heating element or the thermostat. Understanding the physics of the process will help you save time and budget.
Modern refrigerators Atlant are equipped with complex electronics, but the basic operating principles remain the same. Impaired circulation of refrigerant or air leads to local overcooling of areas where moisture accumulates. This is where the snowball begins to grow.
The principle of operation of the cooling system and the formation of condensation
To understand where the snow comes from, you need to understand the physics of the process. The air inside the chamber always contains water vapor, which gets there from food, open dishes, or simply when the door is opened. When warm, moist air comes into contact with the cold back wall, moisture condenses.
In a working refrigerator, this water flows into the drainage hole and through a chute into a container above the compressor, where it safely evaporates. If the wall temperature drops below the freezing point, or the outflow of water is obstructed, ice crustforms. Over time, it grows, turning into a snowdrift.
In models with technology No Frost moisture is frozen on the evaporator hidden behind the panel, and dry cold air is supplied to the chamber. The appearance of snow directly in the chamber or on the back wall (if there are no ventilation holes there) indicates that the evaporator defrost system is not coping well, and ice is growing inside.
It is critically important to understand that a layer of snow more than 5 mm thick already acts as a heat insulator. The compressor is forced to work longer and harder, trying to cool the chamber through this barrier. This is a direct path to motor overload and increased electricity bills.
It is also worth considering that different models Atlant have different design features. In some, the evaporator is located openly, in others it is hidden. The location of the snow build-up can tell you which unit is not working correctly.
Natural reasons: when it’s too early to panic
The appearance of frost does not always mean a breakdown. There are situations where ice freezing is a temporary and natural process. For example, if you have just placed a large amount of warm food in the chamber or left the door open for a long time.
In such cases, the cooling system works in enhanced mode, trying to restore the set temperature balance. The humidity rises sharply, and the back wall, being the coldest element, becomes covered with condensation, which can quickly freeze.
However, if after closing the door and stabilizing the temperature (after 4-6 hours) the ice has not melted but continues to grow, then the problem is not in air humidity. It is necessary to look for a technical fault. It is also worth checking whether the food is leaning against the back wall.
Contact of warm vegetables or fruits with a cold surface disrupts heat transfer. At the point of contact, a local zone of strong cooling is formed, where moisture instantly crystallizes. This is a common operating error that can be easily corrected.
Another reason may be the seasonal factor. In the summer, when the apartment is hot and humid, the load on the refrigerator Atlant increases many times over. If there is high humidity in the room, more condensation will form, and the system may not have time to remove it.
Faulty seal and violation of tightness
One of the most common reasons why snow freezes on the back wall of the refrigerator Atlant is a loose fit doors. Warm, moist air from the room constantly enters the chamber through the cracks. The cooling system does not have time to remove this moisture, and it settles on the coldest surfaces.
You can check the tightness with a simple test with a sheet of paper. Clamp the sheet with the door around the perimeter. If the paper is removed easily and without resistance, it means that it is not adhering in this place. Inspect the rubber for cracks, creases or dirt. sealing rubber does not fit. Inspect the rubber band for cracks, creases, or dirt.
Often the problem is solved by thoroughly washing the seal with warm water and soap. Grease and sticky food residues prevent a tight seal. If the rubber becomes stiff or deformed, it must be replaced. In some cases, heating the deformed areas with a hairdryer to restore elasticity helps.
Also check the door hinges. If they become loose, the door warps and the seal is broken at the top or bottom. Adjusting the hinges is a simple procedure that you can do yourself using a key.
⚠️ Attention: Even a microscopic gap in the seal leads to a constant influx of moisture. The ice will build up endlessly until you fix the leak.
In older models Atlant seals lose their magnetic properties over time. If cleaning does not help, and replacement is not possible right now, you can temporarily press the door with a weight after closing, but this is only a half-measure.
Problems with the thermostat and temperature sensors
The thermostat (thermostat) is the “brain” that commands the compressor when turn on and off. If this device fails and is “stuck” in the “on” position, the refrigerator will freeze continuously. The back wall will cool to extremely low temperatures, turning all the condensation into snow.
In models with electronic control, the temperature is controlled sensors (thermistors). If the sensor “lies” and shows that the chamber is warmer than it actually is, the controller will give a command to cool. As a result, the food in the chamber may already be freezing, but the compressor is still humming, building up a coat of ice.
Diagnostics of a mechanical thermostat is possible at home. It is usually located inside the camera or under the lighting shade. You can carefully remove it and check the contacts with a tester after cooling the sensitive tube. However, to fine-tune or replace electronic sensors, it is better to call a specialist.
Symptoms of a malfunctioning thermostat:
- ❄️ The compressor works non-stop, without turning off for hours.
- 🌡️ The temperature in the chamber is much lower installed.
- 💧 Products at the back wall freeze into ice blocks.
- 🔌 When disconnected from the network for a short time and turned on again, the compressor does not start immediately.
Replacing the thermostat is an inexpensive procedure, but requires disassembling the housing. It is important to choose an analogue with identical parameters, otherwise the operating mode of the refrigerator Atlant will be disrupted.
☑️ Diagnostics of the thermostat
Failure in the defrost system (for No Frost refrigerators)
If you have a refrigerator Atlant with a system No Frost, and snow appears on the back wall or bottom of the chamber, this is almost guaranteed to mean a system malfunction evaporator defrost. Ice builds up on the hidden evaporator, blocks the ventilation ducts, and cold air stops circulating correctly, causing local freezing.
The defrost system consists of three main elements: a heater (heating element), a thermostat (or defrost sensor) and a timer (or electronic control module). Failure of any of them leads to the evaporator becoming overgrown with ice, which does not have time to melt during defrosting cycles.
Most often it burns out Evaporator heating element. It is a tube built into an aluminum radiator. Over time, the filament becomes thinner and breaks. You can check its integrity with a multimeter in dial mode. The resistance of a working heating element is usually from 200 to 600 Ohms.
The second suspect is the defrost sensor. It controls the temperature of the evaporator and gives a command to turn off the heater. If it is faulty, the heating may not turn on at all or, conversely, last too long.
The third element is the defrost timer. In mechanical models, this is a device with a motor that switches the “cooling” and “defrost” modes. If the timer is stuck in cooling mode, defrost will never occur. In electronic models, this function is performed by the control module.
| System element | Function | Failure symptom | Check method |
|---|---|---|---|
| Evaporator heating element | Heats the ice on the evaporator | The ice does not melt, the fan is humming, there is no cold | Dial with a multimeter |
| Defrost sensor | Controls the heating temperature | The heating element does not turn on or heats constantly | Resistance measurement at different temperatures |
| Defrost timer | Switches operating modes | The refrigerator does not go into defrost mode | Forced transfer to defrost mode |
| Control module | Controls all electronics | Chaotic operation, errors on the display | Diagnostics of error codes |
For repairs, you will need to remove the back panel in the freezer compartment (or in the main one, depending on the model Atlant), defrost the evaporator completely (at least 24 hours) and replace the faulty part.
⚠️ Attention: When replacing The heating element or sensors in the No Frost system need to completely defrost the refrigerator. Attempting repairs without complete defrosting can lead to damage to plastic parts and incorrect installation of new elements.
Clogged drainage system
In refrigerators with a drip system (“crying wall”), water should flow freely into the drainage hole located at the bottom of the rear wall. If this channel becomes clogged with crumbs, mold or ice, the water has nowhere to go. It accumulates in the gutter, freezes and turns into a snowdrift, which gradually grows up the wall.
Cleaning the drainage is one of the simplest and most effective procedures. You will need a flexible brush (often included) or soft wire, as well as a syringe with warm water.
Carefully insert the brush into the hole and make rotational movements, trying to break through the plug. Then pour some warm (not boiling water!) water into it to wash away any remaining dirt. The water should drain quickly with a “gurgling” sound.
If the drainage is clogged with ice, it will take a long time to defrost. You can use a blower with hot water, pouring it in small portions into the hole until the ice melts. The main thing is not to damage the plastic walls of the canal with sharp objects.
Regular prevention will help avoid this problem. Once every six months, it is recommended to check the cleanliness of the drainage hole and, if necessary, flush it. This is especially true if you store food in open containers in the refrigerator or often defrost it aggressively.
What will happen if you do not clean the drain?
Water will overflow the edge of the groove and begin to accumulate on the shelves of the refrigerator, and then flow out onto the floor. In addition, standing water is an ideal environment for the growth of bacteria and the appearance of an unpleasant odor.
Freon leakage and other complex faults
A more rare, but possible cause of freezing of the rear wall is a refrigerant (freon) leak. When the amount of gas in the system decreases, the circulation cycle is disrupted. Freon can boil ahead of time, causing severe local supercooling of a section of the evaporator tube, which leads to ice freezing in this particular place.
Usually, when there is a leak, the refrigerator Atlant starts working intermittently or, conversely, without stopping, but it produces little cold. The ice build-up is often shaped and located in the exit area of the evaporator tubes.
It is impossible to eliminate the leak on your own. It is necessary to search for the location of damage, solder and refill the system with refrigerant in compliance with evacuation technology. This work should only be performed by a qualified technician with equipment.
It is also worth mentioning problems with the fan in the No Frost system. If the impeller is iced up or the motor is burned out, cold air does not circulate. As a result, the evaporator freezes, and the chamber becomes warm, but condensation may form on the back wall, which immediately freezes due to lack of airflow.
Diagnostics of the fan is simple: open the freezer door (in some models the main one), press the door sensor button (so that the refrigerator “thinks” the door is closed) and listen. The sound of a running fan should be heard. If there is silence, the fan is faulty or de-energized.
Repairing the refrigerant circulation system or replacing the fan requires disassembling the housing and the availability of spare parts. If your refrigerator Atlant is under warranty, independent intervention will deprive you of the right to free repairs.
⚠️ Attention: A freon leak is often accompanied by oily spots where the tubes are damaged. If you see traces of oil on the rear grille or compressor tubes, call a technician.
Frequently asked questions (FAQ)
Is it possible to scrape the ice with a knife to speed up the process?
Absolutely not! The back wall of the refrigerator Atlant contains thin evaporator tubes hidden in plastic or aluminum. One careless movement with a knife will lead to a puncture and instant leakage of freon. Repairs in this case will be very expensive. Defrost only naturally.
How long does it take to defrost the refrigerator to remove a snow coat?
It takes at least 24 hours for the ice in the No Frost system to completely melt and moisture to evaporate from hard-to-reach places. If you rush and turn on the unit earlier, the residual moisture will freeze again and can damage the fan or sensors.
Why does snow appear only in one corner of the rear wall?
Local freezing often indicates a freon leak in this place or that the thermal insulation of the housing is damaged there. This may also be a consequence of the fact that the food is pressed too tightly against the wall in this corner, blocking air circulation.
Does installing a refrigerator near the radiator affect the formation of ice?
Yes, it does indirectly. If the refrigerator Atlant is standing next to it, its compressor works with increased load, trying to compensate for external heating. This can lead to more intense cooling and, in the presence of other factors (for example, a bad seal), to increased formation of condensation and ice.
What to do if, after defrosting, ice appears again a day later?
This is a sign of a malfunction, not a temporary failure. Most likely, the defrosting system (heating element, timer, sensor) is not working or the seal of the chamber is broken. It is necessary to carry out diagnostics according to the points described in the article, starting with checking the seal and drainage.