The situation when a two-chamber refrigerator Atlant stops freezing, always takes you by surprise, because it threatens to spoil a large number of products. The owner immediately notices that the ice is melting in the freezer compartment, and it is becoming warm in the refrigerator compartment, although the compressor can work continuously or, conversely, remain silent. Owners of Belarusian equipment often encounter this, since the brand is popular and has been in use for years, and the resource of the nodes is not endless.
Before calling a technician or panicking, it is necessary to carry out an initial diagnosis that will help understand the scale of the problem. Often the reason lies in a banal violation of operating rules or reset of settings, which can be easily corrected yourself without calling a specialist. However, in 80% of cases, the problem is of a technical nature and is associated with the failure of one of the key components of the cooling system.
In this article we will look in detail at why Atlant refrigerator it freezes poorly, how to identify a specific breakdown based on indirect signs, and whether it is worth undertaking repairs yourself. Understanding the operating principles of your model will help save time and money, as well as prevent the final failure of an expensive unit.
Primary diagnostics: can you hear the sound of the compressor
The first step in determining the malfunction is to listen to the operation of the motor-compressor. If the unit is plugged in, the light inside is on, but compressor silent, this indicates problems with the electrical circuit or trigger mechanism. In normal operation, you should hear a smooth hum, interrupted by periods of silence when the temperature inside the chambers has reached the set values.
If the motor hums, but very quietly, or you hear clicks, after which there is silence, this may indicate an attempt to start and an instantaneous shutdown of the protection. This situation often occurs when the starting relay breaks down or there is an interturn short circuit in the motor windings. In some cases, the compressor works continuously, without turning off for a minute, trying to gain temperature, but cannot cope with the task.
⚠️ Attention: If you hear a loud knocking or cracking sound when you try to turn on, immediately unplug the device. Continuing operation in this mode can lead to the final combustion of the compressor windings, the repair of which is often not economically feasible.
To accurately determine the condition of the motor, you can use a multimeter by testing the windings for resistance. Normal values depend on the specific model Atlant, but usually range from 20 to 40 Ohms for the starting and operating windings. If the device shows infinity or zero, the engine is faulty.
Faults in the thermostat and temperature sensors
One of the most common reasons why a two-chamber refrigerator Atlant freezing, is a failure of the thermostat or electronic sensor. It is this element that tells the compressor when to turn on for cooling and when to stop. If the thermostat is “stuck” in the “off” position, the motor simply will not receive a signal to start.
In mechanical models, such as the series Atlant 4008 or 4502, the thermostat is a device with a capillary tube that responds to changes in temperature. Over time, the gas inside the tube may evaporate or the contacts may oxidize, causing the circuit to break. You can check it by closing the contacts directly: if the refrigerator is working, then the problem is in the regulator.
In models with a system No Frost or electronic control, temperature sensors (thermistors) are used. Their resistance changes depending on the temperature, and if the value is outside the normal range, the controller blocks the operation of the compressor to avoid an accident. Replacing such an element requires disassembling the internal panel and having a new sensor with similar characteristics.
Symptoms of a malfunctioning thermostat often manifest themselves in incorrect operation cycles. For example, a refrigerator can turn on for 10 seconds and turn off for 10 minutes, or run for days without a break, causing severe frosting on the back wall. In such cases, replacing the temperature controller is the only solution.
Refrigerant problems: freon leak and capillary blockage
If the compressor runs continuously, hums, but there is no cold in any of the chambers, there is a high probability of a refrigerant leak or capillary tube blockage. Freon is the working fluid of the system, which circulates along the circuit, taking away heat. In two-chamber Atlantakh a mixture of refrigerants is often used, and even a microscopic hole in the evaporator leads to a loss of efficiency.
A leak can occur in the foamed part of the housing (inside the walls) or in the visible circuit (condenser at the back). In the first case, the repair is complicated and expensive, since it requires the installation of an external evaporator ("crying" on the rear wall). In the second case, the technician can find the leak using an oil stain or using a leak detector, solder the hole and refill the system.
Clogged capillary tube is the second common reason for the lack of cold when the engine is running. Oil circulates in the system, which over time can thicken or mix with breakdown products, forming a plug. A characteristic sign of a blockage is a temperature difference: the filter drier can be warm, and the evaporator can be cold only at the inlet.
Why can’t you refill freon without vacuuming?
If you simply add gas to a leaking system, air and moisture will remain in it. The moisture will freeze in the capillary, causing an ice jam, and the air will increase pressure, which will lead to overload and breakdown of the compressor in a short time.
Diagnosis of these problems requires special equipment: a pressure gauge station and a vacuum pump. It is almost impossible to independently determine the exact location of a leak or plug without experience and tools.
Failure of the defrost system (for No Frost models)
In refrigerators Atlant with a system No Frost a frequent reason for the cooling to stop is a malfunction of the defrost system. If the defrost heating element, timer or defrost sensor fails, the evaporator in the freezer becomes overgrown with a “coat” of ice. This ice blocks the circulation of cold air, and it stops flowing into the refrigerator compartment.
Visually this manifests itself as follows: in the freezer, food may still freeze (near the walls), but it is warm in the main chamber. If you defrost the refrigerator manually for 10-12 hours and after turning it on it will start to freeze normally, but after 1-2 weeks the problem will return - this is definitely the defrosting system.
The main elements that require checking:
- ❄️ Defrost heating element —a heating element that should melt the ice on the evaporator. The spiral inside often burns out.
- 🌡️ Defrost sensor - controls the temperature of the evaporator and turns off the heating element when the ice has melted. If it “lies,” the heating may not turn on at all.
- ⏱️ Defrost timer (or electronic module) - sets the cycles of turning on and off the defrost mode. Mechanical timers often jam.
To replace these elements in two-chamber ones Atlantakh often requires complete disassembly of the freezer, removing the back panel and removing a layer of ice. It is important not to damage the plastic box and ventilation ducts during operation.
Mechanical damage and wear of seals
Sometimes the reason that the refrigerator does not freeze is trivial - a violation of the seal of the chamber. If rubber seal the door is worn out, dirty or deformed, warm air constantly enters the chamber. The compressor tries to compensate for heat loss by working non-stop, but cannot reach the desired temperature.
You can check the tightness of the seal with a simple test with a sheet of paper. Clamp the sheet with the door around the perimeter: if it pulls out without resistance or falls out on its own, then there is no tightness in this place. Pay special attention to the corners and bends of the seal.
It is also worth checking the door hinges. Over time, they can weaken and the door warps, creating a gap at the bottom or top. Adjusting the hinges often solves the problem without replacing the rubber. In two-chamber models Atlant the hinges of the lower door are especially subject to stress.
☑️ Check the tightness
Table of common malfunctions
For ease of diagnosis, the main symptoms and probable causes are summarized in a table. This will help you quickly navigate the nature of the breakdown of your Atlanta.
| Symptom | Probable cause | Difficulty of repair |
|---|---|---|
| The compressor does not start, clicks no | Thermostat or wiring malfunction | Low |
| Buzzes, clicks and turns off | Start relay or compressor wedge | Medium |
| Works without stopping, there is no cold | Freon leak or system blockage | High |
| The freezer is working, it is warm in the refrigerator compartment | Malfunction of the defrost system (No Frost) or misalignment of the door | Average |
| Severe freezing of the rear wall | Faulty defrost sensor or timer | Average |
It is worth noting that diagnostics using the table gives only a preliminary result. An accurate diagnosis can only be made by a technician with a device for measuring pressure in the system and a current clamp.
When you need to call a technician: critical breakdowns
There are a number of malfunctions that are almost impossible to deal with at home without losing the warranty or risking finishing off the equipment. If after checking the electrical system and defrosting the problem does not disappear, most likely a complex repair is required.
Critical cases are when it is required replacement of the compressor. This is the “heart” of the refrigerator, and replacing it requires soldering copper tubes, evacuating the system and accurately charging a certain weight of freon. An error in the amount of refrigerant will lead to rapid breakdown of the new motor.
Also, professional intervention requires eliminating a leak in the foamed circuit (inside the housing). Craftsmen often resort to installing an external evaporator (grid) on the back wall inside the chamber, since opening the polyurethane foam and changing the built-in heat exchanger is not economically profitable.
⚠️ Attention: Modern Atlant refrigerators can use complex mixtures of refrigerants (isobutane, propane). These gases are explosive when concentrated in air. It is strictly prohibited to carry out soldering and refueling work in an unventilated area without suctioning out residual gas.
If you do not have the skills to work with a blowtorch, pressure gauges and electricians, do not try to disassemble a sealed circuit. It is better to contact an authorized service center, where they will give a guarantee for the work performed.
Prevention and extension of service life
To prevent the question “why the refrigerator does not freeze” from arising too often, it is important to follow the operating rules. Regular defrosting (even once a year for No Frost systems) helps maintain heat transfer efficiency. Ice accumulation in hard-to-reach places can interfere with the sensors.
Do not place hot food in the chamber or overload the shelves to prevent air circulation. Also keep the condenser grille at the back clean: dust and animal hair act as a heat insulator, causing the compressor to work overload.
Timely attention to minor changes in operation - the appearance of noise, increased frequency of switching cycles, the formation of puddles - will help catch the malfunction at an early stage, when repairs will be cheaper.
What to do if the Atlant refrigerator has defrosted and no longer turns on?
If complete defrosting has occurred, let the unit stand unplugged for at least 4-6 hours (preferably a day). This is necessary so that the oil in the compressor flows into the crankcase and moisture from the electrical circuits evaporates. After that, try turning it on. If it doesn’t work, the problem is in the start relay or compressor.
Is it possible to use an Atlant refrigerator if it does not freeze well?
You can operate the equipment in this mode only for a short time (until the technician arrives). Long-term operation at partial load or, conversely, in non-stop mode due to freon leakage, leads to overheating of the compressor windings and eventual combustion. Food in a warm chamber will quickly deteriorate.
What refrigerant is used in Atlant refrigerators?
Most modern models use isobutane (R600a) or its mixtures. This is an environmentally friendly gas, but it requires high-quality evacuation of the system during repairs. Older models can run on R134a freon. The type of refrigerant is indicated on the nameplate (sticker) inside the chamber or on the back.
Why does ice freeze on the back wall in the Atlant refrigeration chamber?
This may be a sign of a malfunction of the defrost sensor (in No Frost models) or a sign that in conventional models the water from the drainage hole does not have time to drain and freezes. Also, an ice coat may indicate that the door is not closing tightly or the drainage is clogged.