Owners of Belarusian-made equipment often encounter a situation where a thick coat of snow or a thick layer of ice appears on the back inner wall of the refrigerator compartment. For models with a Direct Cool system (drip defrosting), the formation of a small amount of frost during the compressor operating cycle is an absolutely normal physical process. However, if the ice does not have time to drain into the drainage tray and turns into a monolithic layer that prevents the shelves from being closed, this is a signal of a malfunction.
Ignoring this problem can lead to food spoilage, increased energy consumption and even compressor failure due to overload. In this article we will analyze in detail why the unit Atlant behaves incorrectly, how to distinguish normal from breakdown and what steps need to be taken to eliminate the defect on your own or by calling a specialist.
Physics of the process: normal or pathological?
To understand the essence of the problem, it is necessary to understand the principle of operation of the evaporator. In refrigerators Atlant with a drip cooling system, the rear wall of the chamber is made of aluminum and is part of the evaporator. During operation of the compressor, the temperature of this surface drops to minus values, due to which the moisture contained in the air of the chamber condenses on it and freezes.
In normal mode, when the compressor is turned off, the wall heats up, and the resulting frost melts, turning into water. The water flows down the groove into the drainage hole and then through the tube enters the container above the motor, where it evaporates. If you see that the back wall is covered with a uniform layer of frostwhich completely disappears during a pause in the engine, then the equipment is working properly.
The alarm should be sounded if:
- ❄️ Icy the layer does not melt even after a long stop of the compressor.
- 💧 Water does not go into the drainage, but accumulates at the bottom of the refrigerator compartment or under vegetable boxes.
- 🧊 Freezing occurs locally, forming icicles or a “beard” in one place.
It is important to note that in models c No Frost the back wall should not be covered with ice at all, since a forced airflow system works there. The appearance of ice inside the chamber in such models is a 100% sign of a malfunction of the defrosting system.
⚠️ Attention: If the ice crust is so large that it has frozen to the products or shelves, under no circumstances try to pick it out with a knife or sharp objects. You risk breaking the evaporator circuit, which will lead to freon leakage and expensive repairs.
Violation of operating and tightness rules
Before looking for complex technical faults, it is worth eliminating trivial errors in using equipment. Often the reason why ice freezes lies in the actions of the owner himself. The most common mistake is placing hot or warm food in the chamber. Evaporating moisture instantly settles on the cold wall, turning into ice. Atlant ice freezing lies in the actions of the owner himself. The most common mistake is placing hot or warm food in the chamber. The evaporating moisture instantly settles on the cold wall, turning into ice.
The second critical factor is a violation of the tightness of the door seal. If the rubber is worn out, dirty, or simply does not fit tightly, warm, moist air from the room constantly enters the chamber. The cooling system cannot cope with such a volume of moisture, and it settles on the back wall.
Check the condition of the seal:
- 🔍 Visually inspect the rubber for cracks, tears or dents.
- 🚪 Check the tightness of the seal using a sheet of paper: clamp the sheet with the door perimeter. If it is pulled out without resistance, the seal is broken.
- 🧼 Make sure that there are no crumbs or sticky deposits on the seal that would prevent it from closing tightly.
It is also worth paying attention to the frequency of opening the door. If the refrigerator is in a kitchen with high humidity or next to a stove, the load on the system increases many times over.
Malfunctions of the defrosting system (heating element, timer, sensor)
If everything is in order with the tightness, and the ice continues to grow, the problem lies in the automatic defrosting unit. In refrigerators Atlant three main elements are responsible for removing heat and melting ice: Evaporator heating element, thermostat defrosting (sensor) and timer (or electronic control module).
Most often the heating element fails. The heating element is a tube built into the back panel (in No Frost models) or located at the bottom (in some modifications). If it burns out, the ice does not melt during the defrost cycle, building up with each compressor cycle. As a result, the air channels are blocked, and the cold stops flowing into the chamber, although the compressor operates continuously.
The second suspect is the defrost sensor. It controls the temperature of the evaporator. If the sensor “lies” and shows that there is no ice (or, conversely, that the temperature is too high), the command to turn on the heating element is not received. As a result, the system works only for freezing, ignoring the need for defrosting.
Table of main symptoms of defrosting system malfunctions:
| Faulty element | Symptom 1 | Symptom 2 | Result |
|---|---|---|---|
| Heating element (heater) | Ice does not melt when defrosting | The refrigerator does not freeze | Increasing "fur coat" |
| Sensor defrost | Chaotic operation | Short cycles | Insufficient defrosting |
| Timer/Module | No transition to defrost mode | Constant operation of the compressor | Full icing |
How to check the heating element with a multimeter?
To check, you need to “ring” the heating element. Switch the multimeter to resistance (ohms) measurement mode. Touch the probes to the contacts of the heating element. If the device shows infinity (open circuit) or zero (short circuit), the element is faulty and requires replacement. The normal resistance of a working heating element is usually from 200 to 300 Ohms.
Clogging of the drainage system
One of the most common reasons why water does not drain away, but turns into an ice plug, is a banal blockage of the drainage hole. It is located at the bottom of the rear wall of the refrigerator compartment. Dust, food particles, mold and other debris get into it, which over time forms a tight blockage.
Water from the melting frost cannot go into the drip tray, overflows the edge of the groove and freezes at the bottom of the chamber, forming an ice block. Over time, this ice rises higher, capturing the lower shelves. In models Atlant the drainage tube can also freeze inside the case if the thermal insulation is broken.
To clean the drainage you can use:
- 🧶 Soft wire or a special brush (act carefully so as not to pierce the tube).
- 💉 Medical syringe with warm water for rinsing under pressure.
- 🌡️ Bulb for douching.
The procedure requires completely defrosting the refrigerator. After all the ice has melted, you need to pour warm (not boiling water!) water into the hole and watch how quickly it goes away. If the water is standing, mechanical cleaning is required.
☑️ Algorithm for cleaning the drainage
Problems with the thermostat and freon leakage
Sometimes a “snow coat” on the back wall is a consequence of incorrect operation of the thermostat. If its contacts stick in the “on” position, the compressor runs without stopping. The back wall freezes through, and the moisture from the air does not have time to drain, turning into a thick layer of ice. In this case, the refrigerator may freeze too much, freezing food even on the top shelves.
A more complex and dangerous situation is a micro-leakage of refrigerant (freon). As the amount of gas in the system decreases, the boiling point shifts. The evaporator begins to cool unevenly: at the point of freon entry (usually the corner near the rear wall), a local focus of severe icing forms, while the rest of the evaporator may be warm.
Characteristic signs of a leak:
- 📉 The compressor works almost without interruption, trying to gain temperature.
- 🌡️ The refrigerator compartment is warm, but the back wall is covered with ice in one place.
- 🔊 The condenser (grid at the back) is only partially warm or cold.
It is difficult to diagnose a leak on your own; equipment is required to find the location of the circuit damage and vacuum systems.
⚠️ Attention: If you suspect a freon leak, further operation of the refrigerator is useless and harmful to the compressor. It is impossible to refuel the system yourself - you need a license and special tools. Call a professional.
Algorithm of action: complete defrosting and diagnostics
The first thing to do when you detect abundant ice is to carry out a complete defrosting. This is not just a hygienic procedure, but also an important diagnostic stage. Many temporary malfunctions (for example, an electronics failure or a frozen sensor) can be eliminated after a full “cooling-heating” cycle.
Unplug the refrigerator, open the doors and leave it for at least 24 hours (preferably a day). Do not use a hairdryer or hot water to speed up the process if you want to preserve the equipment - sudden temperature changes are harmful to the plastic and soldering of the evaporator. All products must be removed.
After defrosting:
- Wipe the chamber thoroughly dry.
- Check the cleanliness of the drainage hole.
- Turn on the refrigerator empty.
- Note the operating time before the first shutdown.
If after switching on the ice began to actively grow again within 1-2 days, then the problem is technical. If the equipment works for a week without complaints, perhaps the reason was a violation of operating rules or a one-time failure.
Frequently asked questions (FAQ)
Why is the back wall wet and not icy?
If there is just condensation (drops of water) on the back wall that does not freeze, this may indicate that the thermostat is set to too weak a cooling mode, or that a lot of warm air is getting into the chamber. This is also typical for hot weather, when the refrigerator operates in enhanced mode, but the moisture removal system copes.
Is it possible to operate the Atlant with frozen ice?
For a short time - yes, but this will lead to an increase in energy consumption and a decrease in cooling efficiency. Long-term operation with a “fur coat” on the evaporator leads to overheating of the compressor and its premature failure. Ice acts as a heat insulator, interfering with normal heat exchange.
How much does it cost to repair a defrost system?
The cost depends on the region and model. Replacing a heating element or sensor is usually cheaper than repairing a control module or finding a freon leak. On average, the cost of spare parts for a defrost system Atlant is affordable, but the work of a technician can make up a significant portion of the amount.
Do you need to change the seal if it simply does not magnetize?
It is not necessary to immediately buy a new one. Often it is enough to heat the seal with a hairdryer (carefully!) and straighten out the creases, or place a tourniquet under the rubber in the place of a loose fit. If the rubber has hardened over time or is torn, replacement is inevitable.