Owners of refrigerators Atlant often face a situation where inside the main chamber ice or even a full-fledged ice crust appears on the back wall. This phenomenon not only spoils the appearance of the unit and reduces the useful volume, but may also indicate serious malfunctions in the operation of the cooling system. Capillary system or No Frost —regardless of the type of cooling, problems with freezing require immediate attention.
Ignoring the first signs of excessive ice formation can lead to failure of the compressor, which begins to operate under increased load, trying to compensate for the impaired heat transfer. In this article, we will analyze in detail the technical causes of the defect, diagnostic methods and ways to fix the problem yourself.
The principle of operation of the defrost system in Atlant refrigerators
To understand the nature of freezing, it is necessary to briefly consider the algorithm of operation of the refrigeration circuit. In models with a drip defrost system, moisture condensing on the cold rear wall of the evaporator flows into the drainage hole. There it is discharged through a tube into a container above the compressor, where it evaporates naturally. If this cycle is disrupted, the water does not have time to drain and freezes.
In units with a system No Frost the process is controlled electronically. The defrost heating element is periodically turned on, which melts the frost on the evaporator hidden behind the rear panel. Defrost thermostat or timer monitor the temperature and cycle duration. A failure in the operation of any element of this chain leads to the fact that the ice grows faster than it has time to melt.
Modern models Atlant equipped with sophisticated control systems, but even they are subject to wear. Mechanical damage, power surges or simply the exhaustion of parts lead to the fact that water begins to turn into ice directly on the products or walls of the chamber.
⚠️ Attention: Constant operation of the compressor without stopping (a sign of which is a hum and hot side walls) is often a direct consequence of the fouling of the evaporator with ice, which works like heat insulator.
Malfunctions of the thermostat and temperature sensors
One of the most common reasons for the formation of a “fur coat” on the back wall is incorrect operation of the thermostat. This device is responsible for turning the compressor on and off depending on the temperature inside the chamber. If thermostat sticks in the “on” position, the compressor works continuously, not allowing the wall to warm up for natural defrosting.
In models with electronic control, sensors are responsible for the temperature. If the evaporator temperature sensor transmits incorrect data to the control module, the system “thinks” that the chamber is warm and does not start the defrost cycle. As a result, the moisture crystallizes, forming a dense layer of ice.
Diagnostics of a mechanical thermostat is possible at home. To do this, you need to carefully remove the sensor bellows tube from the chamber and warm it in your hands or with warm water. If the compressor does not turn off within 15-20 minutes after this, the device is faulty and requires replacement. Electronic sensors are checked for resistance with a multimeter.
It is worth considering that different models Atlant use different types of sensors. There are no universal solutions here, and the selection of spare parts must be carried out strictly according to the catalog number or compatibility with a specific modification.
Problems with the seal and chamber tightness
It would seem, what does the rubber gasket on the door have to do with the ice on the back wall? The answer is simple: through a loose seal, warm, moist air from the room constantly enters the chamber. Moisture settles on the coldest surface - the back wall - and instantly freezes.
You can check the tightness by simple visual inspection and tactile method. Run your hand around the perimeter of the door of a closed refrigerator - there should be no blowing anywhere. A test with a sheet of paper is also effective: press the sheet with a door around the perimeter. If it is pulled out without resistance, it means that in this place seal does not fit.
Often the problem lies not in the rubber itself, but in the misalignment of the door. The hinges may have become loose or deformed due to the weight of the food. In this case, even a new seal will not save the situation. It is necessary to adjust the position of the door by tightening the fastening bolts or replacing worn bushings.
| Type of malfunction | Symptom | Elimination method |
|---|---|---|
| Rubber wear | Cracks, loss of elasticity | Replacing the seal |
| Contamination | Sticky coating, loose fit | Washing with soapy water |
| Distortion doors | Gap in the upper or lower part | Hinge adjustment |
| Deformation of the body | Bulging of the wall at the opening | Thermal insulation repair (complicated) |
⚠️ Attention: If you find swelling of the internal plastic near the doorway, this is a sign of a violation of the thermal insulation of the case. Water got between the walls and froze, bursting the structure. Serious repairs are required.
Clogged water drainage system
In refrigerators with a drip defrosting system, the drainage hole is the “neck of the bottle” of the entire moisture removal system. It is located at the bottom of the rear wall. Over time, crumbs, food particles or mucus get there, forming a plug.
When the hole is clogged, melt water does not go into the tray, but accumulates in the groove, freezes and turns into an ice block. Over time, this ice grows, cutting off air flow to the evaporator and impairing cooling. Visually, it looks like ice flowing from the back wall directly onto the shelves.
For cleaning, you can use a special brush, which is often included, or soft wire. The main thing is not to damage the thin walls of the drainage tube. After mechanical cleaning, it is recommended to pour warm water from a syringe into the hole to ensure free drainage.
☑️ Cleaning the drainage
Sometimes (the blockage) is deeper, at the junction of the tube with the body. In such cases, it may be necessary to partially disassemble the rear panel inside the chamber to get to the problem area.
Faults in the No Frost system (heating element, timer, sensor)
If your Atlanta system is declared No Frost, but ice still appears, it means The defrost cycle is not performed. A combination of three elements is responsible for this process: a heater (heating element), a defrost timer (or electronic module) and a defrost sensor.
Defrost heating element may simply burn out. You can check its integrity with a multimeter in dial mode. If the circuit is broken, the heater will not turn on, and the evaporator, hidden behind the plastic panel, will become covered with ice. This ice will eventually begin to interfere with the fan and be blown into the chamber.
The defrost sensor (defrost thermostat) should open the heating element circuit when the evaporator warms up to a certain temperature. If it is “stuck” in the open state, the control module will not receive a signal to complete defrosting or, conversely, will not start the heating element. The timer is responsible for switching the “cooling” and “defrosting” modes.
Hidden signs of a No Frost malfunction
If you hear a strange cracking or squeaking sound from deep inside the refrigerator, ice may have reached the fan blades. This requires immediate defrosting and repair, otherwise the fan motor will burn out.
System repair No Frost requires deeper disassembly, often with dismantling the rear plastic panel inside the freezer or refrigerator compartment (depending on the layout).
The influence of operating mode and loading products
The reason does not always lie in a breakdown. Sometimes users themselves create conditions for freezing. For example, placing hot or warm food into the chamber. Evaporating moisture instantly condenses on the cold wall, creating excess load on the system.
Proper placement of products is also important. If food is placed close to the back wall, it interferes with air circulation. In areas of stagnant air, temperatures can drop below normal, causing local freezing. In addition, products can mechanically block ventilation openings.
Frequent and prolonged opening of the door, especially in hot and humid weather, leads to a volley of moist air inside. The cooling system does not have time to quickly remove this moisture, and it settles on the walls. This is normal, but if the storage conditions are constantly violated, the ice will have time to grow.
Algorithm for self-diagnosis and defrosting
Before Instead of calling a technician or buying spare parts, it is worth performing the basic procedure of complete defrosting. Often this helps eliminate false faults associated with electronic “glitches” or micro-clogs.
To do this, the refrigerator is disconnected from the network, the doors are opened, and it is left for at least 10-12 hours (preferably for a day). All products must be removed. After this, the unit turns on empty. If after a day the ice did not appear again, the problem was an overload or a one-time failure.
If the problem returned, we proceed according to the algorithm:
1. Check the tightness of the door.
2. Inspect the drainage hole.
3. Listen to the operation of the compressor (cyclicity).
4. Check the temperature in the chamber with a thermometer.
⚠️ Attention: When defrosting, it is strictly forbidden to use sharp objects (knives, screwdrivers) to chip ice. You can puncture the evaporator, and repairs will become economically unfeasible.
Frequently asked questions (FAQ)
Is it possible to operate the Atlant refrigerator with a small amount of ice on the wall?
Short-term operation is possible, but undesirable. Ice impairs heat transfer, forcing the compressor to work longer, which increases energy consumption and wear on the unit. If the ice layer exceeds 2-3 mm, defrosting is necessary.
Why does ice appear only in one corner of the rear wall?
This may indicate a local violation of the refrigerant circulation (a clogged capillary) or that in this place the products are blocking the air flow. It is also possible that the refrigerator itself may be skewed - check the installation level with the feet.
How often do you need to defrost an Atlant refrigerator with a drip system?
Manufacturers recommend carrying out preventive defrosting and washing at least 2 times a year. However, if you notice ice growth, you need to do this immediately, regardless of the schedule.
Does the amount of freon affect the formation of ice?
Yes, it does. If there is a freon leak or deficiency, the compressor may run continuously, trying to gain temperature. This leads to deep freezing and freezing of the evaporator. It is also possible to overflow freon during unqualified repairs.
What to do if, after defrosting, ice appears again after 2 hours?
This is a sign of a serious technical malfunction. Most likely, the defrosting system (heating element, timer, sensor) is not working or the thermostat is stuck. Diagnostics with a multimeter and replacement of defective components are required.