The situation when the lower or upper compartment in refrigeration equipment suddenly stops freezing always takes you by surprise. This is especially offensive if we are talking about reliable Belarusian-made equipment that has proven itself for many years. Owners are often faced with the fact that Atlant refrigerator continues to work, the light is on, but the food in the freezer begins to melt, and the indicators flash, signaling an increase in temperature.
Before calling a technician or running to the store for a new unit, it is worth conducting an initial diagnosis. Often the cause is a simple malfunction of the electronics or incorrect temperature setting, rather than a serious breakdown compressor. Understanding the operating principles of your model will help you save significant money on repairs.
In this article we will analyze in detail the main malfunctions that are typical for various series of the Atlant brand. You will learn how to distinguish a software failure from a mechanical failure and when the intervention of a professional service center is really necessary.
Main reasons for stopping cooling
The most common problem that users encounter is a violation of the refrigerant circulation. If freon leaks out of the system due to microcracks in the evaporator or corrosion of the tubes, cold simply will not be produced. In such cases, the motor-compressor can work continuously, trying to raise the temperature, but to no avail.
Another option is failure of the thermostat. This element is responsible for sending a signal to turn the engine on and off. If the contacts are stuck or the sensor is “lying,” the refrigerator may simply not receive a command to start the cooling cycle. In models with electronic control, this is responsible control module, which is also susceptible to failures.
⚠️ Attention: If you hear the hum of the motor, but there is no cold, do not try to immediately disassemble the back panel. Let the equipment stand turned off for several hours to reset a possible controller error.
You cannot discount a clogged capillary tube. Oil breakdown products or moisture entering the system can form an ice plug that blocks gas movement. Visually, this is manifested by the fact that the condenser grille on the rear wall remains cold or only partially heats up.
- 🧊 Refrigerant leakage due to mechanical damage or corrosion.
- 🔌 Malfunction of the thermostat or air temperature sensor.
- ❄️ Education ice plug in the capillary pipeline.
- ⚙️ Failure of the compressor start-up relay.
Diagnostics of models with the No Frost system
Atlant refrigerators with the system No Frost are more complex than their counterparts with manual defrosting. Here the key role is played by the fan, which drives cold air from the evaporator into the chambers. If the fan stops, the cold remains behind the wall, and the freezer becomes warm.
A frequent cause of problems is a malfunction of the defrost heating element or timer. The system must periodically heat the evaporator to melt frozen frost. If the heating element burns out, ice builds up, blocking the air duct channels. As a result, air stops circulating, and the temperature in the chamber rises.
How to check the defrost heating element with a multimeter?
To check, you need to call the heating element in resistance measurement mode. The normal value should be between 200-300 Ohms. If the device shows infinity or one, the heating element has burned out and requires replacement. Before checking, be sure to unplug the refrigerator!
It is also worth checking the air flow regulator damper. In two-compressor models, it controls the supply of cold. If the damper is stuck in the closed position, the freezer will remain without cooling. The damper mechanism may become clogged with crumbs or ice.
The defrost sensor is another candidate for replacement. It controls the evaporator temperature during defrosting. If it is faulty, the system may either not start defrosting at all, or, conversely, heat for too long, which leads to defrosting of the food.
| Symptom | Possible cause | Check method |
|---|---|---|
| Noisy, but not freezing | The fan is faulty | Listen to operation after opening the door |
| Ice on the back wall | The defrosting heating element is burnt out | Ring the heating element with a multimeter |
| The indicator is flashing | Sensor error | Read the error code by flashing |
| Heat only from above | The damper is jammed | Visual inspection air duct |
Problems with the compressor and start relay
The heart of any refrigerator is the compressor. Atlant models often have reliable motors, but they don’t last forever. If you hear a click, followed by a hum, and a few seconds later another click and silence, then the protection is activated. The engine tries to start, but cannot.
In 80% of such cases, starting relayis to blame. This is a small part that fits onto the compressor contacts. Inside it there is a mechanism that closes the starting winding. Over time, the contacts burn out or the mechanism jams. Replacing a relay is a simple procedure, accessible even to a beginner.
⚠️ Attention: Before replacing the relay, make sure that the voltage in the network is stable. Voltage surges often cause failure of starting equipment. It is recommended to use a surge protector.
If replacing the relay does not help, the problem may be in the compressor itself. Interturn short circuit of the windings or jamming of the piston group requires replacement of the entire unit. This is an expensive repair, which often requires calling a specialist with equipment for filling with freon.
You can check the windings with a multimeter. The resistance between the contacts must be within a certain range (usually from 10 to 30 Ohms for different windings). If the device shows zero (short circuit) or infinity (break), the compressor is faulty.
☑️ Checking the start relay
Failures in the electronic control module
Modern refrigerators Atlant, especially the series with displays, are controlled electronically. The control board receives signals from sensors and commands actuators. A voltage surge or current surge in the network can cause the controller to freeze.
The first thing to do if you suspect an electronic problem is to perform a hard reset. To do this, you need to unplug the cord from the outlet and wait at least 15-20 minutes. During this time, the capacitors on the board will discharge and the memory will be reset to factory settings. This often helps eliminate false errors.
If the problem returns after a reboot, one of the elements on the board (triac, resistor) may have burned out or the contacts of the cables have oxidized. Moisture that gets inside the case when washing the floor or condensation can cause corrosion of the tracks.
In some cases, it is necessary to reflash the module or completely replace it. It is not recommended to get into the board yourself without knowledge of electronics and circuitry - you can finish off working nodes.
Mechanical damage and leaks
Refrigerant leakage is an insidious problem. Freon is odorless and colorless, so it is impossible to detect it visually. Most often, leaks occur in places where tubes are soldered or in the foamed part of the housing, where the metal of the evaporator comes into contact with an aggressive environment.
If you notice that the refrigerator works almost non-stop, and the temperature does not drop below -5...-10 degrees, most likely there is not enough gas in the system. The compressor tries to compensate for the lack of refrigerant by constantly working, which leads to its overheating.
Sometimes a leak can be found by oily stains on the tubes at the back of the refrigerator. The place where freon comes out is often accompanied by a characteristic hissing sound if you listen carefully. However, it is impossible to find a hole in the foamed parts of the body without special equipment.
Important to know: If the leak occurs in the foamed circuit (inside the walls), repairs often become economically impractical. The technician will have to open the case or hang an external evaporator, which will disrupt the aesthetics and thermal insulation.
- 🔍 Visual inspection of the tubes for oil leaks.
- 👂 Listening to the system for hissing.
- 🌡️ Analysis of the duration of operation and pauses of the compressor.
- 💨 Use of a leak detector (only by masters).
The influence of external factors and operation
The reason does not always lie within the equipment. Sometimes we ourselves create conditions under which freezer cannot function normally. For example, installing a refrigerator close to a wall or in a niche without gaps for ventilation leads to overheating of the condenser.
Loading the freezer with warm food is another mistake. A sharp rise in temperature causes the system to wear out. In addition, a large amount of warm air can lead to freezing of the ducts and temporary failure of the defrost system.
⚠️ Attention: Do not install the refrigerator near heating radiators, stoves or in direct sunlight. High ambient temperatures reduce cooling efficiency and increase the load on the components.
Rare defrosting (in models without No Frost) or, conversely, ignoring the need to clean the drainage hole in No Frost systems also lead to problems. Dirt and ice block the drainage of water, which then freezes in inappropriate places.
Frequently asked questions (FAQ)
Why the Atlant freezer works, but does not freeze down to -18?
Most likely, there was a partial release of freon or the capillary tube was clogged. Also check the tightness of the rubber seal on the door. If it lets warm air through, the chamber will not be able to reach the desired temperature.
Is it possible to continue to use the refrigerator if it hums but does not cool?
For a short time - yes, but not recommended. The compressor runs idle and overheats greatly, which can lead to its combustion. It is better to turn off the device and call a technician for diagnostics.
How long should the refrigerator cool down after defrosting before turning it on?
The optimal waiting time after complete defrosting and washing is from 2 to 4 hours. This is necessary so that the refrigerant is distributed throughout the system and the oil flows into the compressor crankcase. Turning on ahead of time can damage the motor.
What does the flashing red indicator on the Atlant panel mean?
A flashing indicator usually signals an increase in the temperature in the chamber above the permissible norm. If, after loading the products and closing the door, it does not go out for several hours, it means that the cooling system is not coping with the task.
How often do you need to defrost an Atlant refrigerator with manual defrosting?
It is recommended to defrost as an ice crust of 3-5 mm thick forms. On average, this happens once every 4-6 months, depending on the humidity of the products and the frequency of opening the doors.