The situation when you open the refrigerator door, you see a light bulb, but it’s warm inside, and the food begins to spoil, always causes panic. This is a classic sign that electrical circuit it is intact, power is supplied to the unit, but the cooling process itself does not start. In models Atlant, which are famous for their reliability, such failures occur less frequently than in competitors, but they cannot be completely excluded.
It is the working backlight that serves as an indicator of the health of the wiring. If the problem lay in broken plugs or a broken cable, the light would not come on. Therefore, you need to look for the root of evil in the nodes responsible directly for refrigerant circulation or controlling the operation of the motor. Ignoring the first symptoms can lead to complete defrosting of the chamber and damage to a large supply of food.
In this article we will analyze in detail the mechanical and electrical causes of cooling system failure. You will learn how to carry out initial diagnostics yourself and in which cases calling a specialist becomes the only solution. It is important to understand that some malfunctions, for example freon leak, require specialized equipment to eliminate.
Primary diagnostics and checking settings
Before disassembling the unit or calling for service, it is worth eliminating trivial operating errors. Often, users accidentally touch the temperature control or change the operating mode without realizing the consequences. In refrigerators Atlant with electronic control, a failure in the settings could occur due to a power surge.
Check whether the “Vacation” or “Economy” mode is set, in which the camera can operate in a gentle mode or be partially turned off. Also make sure that the mechanical type thermostat is not turned to the “0” or “Min” position. Sometimes it is enough just to move the handle to the middle position and wait a few hours for the system to stabilize.
⚠️ Attention: If after defrosting you turned on the refrigerator, but it did not start freezing within 4-6 hours, do not rush to sound the alarm. The unit takes time to reach temperature and reach operating mode, especially if the chamber is warm.
Inspect the rubber seals on the doors. If they do not fit tightly, warm air constantly enters and the motor cannot cope with the load. In this case, the lamp is on, the compressor is humming, but there is no cold. Dirt, stuck crumbs or deformation of the cuff are common culprits ineffective cooling.
Faults of the compressor and start relay
The compressor is the “heart” of the refrigerator, creating pressure for the movement of freon. If the lamp is on, but the engine is silent or makes only a quiet hum and clicking noise, the problem lies in starting the engine. Models Atlant often use a starting relay, which wears out over time or burns out from overloads.
When the starting relay fails, the compressor tries to start, a characteristic click is heard, followed by a hum and a second shutdown click. This cycle can be repeated endlessly. In such cases, the engine becomes very hot, which can lead to its permanent breakdown. Replacing the relay is a relatively simple and inexpensive procedure.
A more serious situation is turn-to-turn short circuit in the windings of the compressor or its wedge. If the engine hums, but does not start even with a working relay, and at the same time gets very hot, the entire unit will probably need to be replaced. It is not economically feasible to repair a hermetic compressor on your own.
☑️ Compressor diagnostics
It is also worth paying attention to the temperature of the rear grille (condenser). If the compressor runs constantly, but the grate remains cold, it means that the refrigerant is not circulating through the system, even if the motor is working properly. This may indicate clogging of the capillary tube or lack of freon.
Refrigerant leak and system blockage
One of the most common reasons why the refrigerator Atlant stopped freezing is a banal freon leak. The refrigerant circulates in a closed circuit, but over time, microcracks in the welds or corrosion damage to the evaporator tubes lead to its release to the outside.
Leakage symptoms usually appear gradually. First, the refrigerator begins to freeze worse, then the compressor operating cycles increase, and eventually it stops turning off completely, working for wear. At the same time, it is warm inside the chamber, and the light continues to burn, signaling the presence of electricity.
⚠️ Attention: Freon is odorless and colorless. If you smell a strange chemical smell, it may be a sign of an oil leak from the compressor or burning wiring, but not the refrigerant itself.
A clogged capillary tube is another mechanical problem. An ice plug may form in the system or debris may enter, blocking the flow of gas. In this case, the compressor works, creating pressure, but the freon does not reach the evaporator. Often, when clogged, you can hear gurgling or see swelling of the filter-drier.
Is it possible to refill the refrigerator yourself?
Refilling it yourself with freon at home is extremely difficult and dangerous. A vacuum pump is required to remove moisture and air, an accurate scale for gas dosing and special soldering equipment. Unprofessional refueling will lead to rapid failure of the compressor.
To eliminate a leak or blockage, you need to call a technician. The specialist will pressurize the system with nitrogen, find the location of the damage, seal it and perform a high-quality Problems with sensors and thermostat refrigerant filling
Problems with sensors and thermostat
In modern models Atlant with the No Frost system and electronic control, sensors are responsible for the temperature. If the air or evaporator temperature sensor fails, it can send an incorrect signal to the control module, reporting that the chamber is already cold enough.
As a result, the compressor simply does not receive the command to turn on. The light is on, the fan may make noise, but there is no cold. You can check the thermostat in mechanical models by closing its contacts. If after this procedure the compressor starts working, then the regulator requires replacement.
Electronic sensors are checked for resistance with a multimeter. Deviation of readings from the norm indicates a malfunction of the element. Also, the cause may be oxidation of the contacts in the sensor connectors, which often happens in conditions of high humidity inside the chamber.
| Symptom | Probable cause | Nature of the malfunction |
|---|---|---|
| The compressor does not hum | Faulty starting relay or thermostat | Electrical |
| The motor hums, but does not start | Compressor wedge or low voltage | Mechanical/Electrical |
| The compressor runs constantly | Freon leak or blockage | Mechanical |
| The refrigerator turns on rarely | The temperature sensor is faulty | Electrical |
Failures in the operation of the control module
The “brain” of the refrigerator is an electronic control module. It is he who receives signals from sensors and commands the compressor when to turn on and off. Voltage surges in the household network are the main enemy of electronics Atlant. Even if the light is on, this does not guarantee the serviceability of the control board.
Often a specific track or relay on the board, responsible for starting the motor, burns out, while the backlight circuit remains intact. Visually, traces of burning, swollen capacitors or blackening may be visible on the board. In some cases, flashing or simply resetting errors disconnecting from the network for 15-20 minutes helps.
If after a reboot the problem persists, it is likely that the module will need to be replaced or its expensive repairs at a service center. Independently soldering board elements without a diagram and experience can aggravate the situation by damaging other components.
Specifics of malfunctions of two-chamber models
In two-chamber refrigerators Atlant a situation often occurs when one chamber freezes normally, but the other does not. For example, the ice in the freezer melts, but the refrigerator compartment is warm. This may indicate problems with the system No Frost or cold distribution.
If the evaporator is overgrown with ice (“fur coat”), the fan cannot drive cold air through the air ducts. This happens when the defrost heating element, timer or defrost sensor malfunctions. The system “thinks that the defrosting was successful, but the ice remains and blocks the channels.
It is also worth checking the damper that regulates the air flow between the chambers. If it is stuck in the closed position, the cold simply does not flow into the desired compartment. Mechanical damage to the damper or a violation of its calibration can be easily eliminated by disassembling the internal panel.
⚠️ Attention: When trying to defrost the “fur coat” with sharp objects (knife, screwdriver), there is a high risk of piercing the evaporator. This will lead to an instant leak of freon and expensive repairs with soldering and refilling.
Frequently asked questions and answers (FAQ)
How long does the Atlas refrigerator take to gain temperature after defrosting?
Usually the temperature stabilization process takes from 2 to 6 hours depending on the chamber volume and quantity loaded products. Complete freezing to the specified parameters can last up to 24 hours.
Is it possible to operate a refrigerator if it hums, but does not freeze?
Long-term operation of the compressor without cooling (idling) leads to its overheating and burnout of the windings. It is better to disconnect the device from the network until the causes of the malfunction are determined.
Why, after replacing the compressor, the refrigerator still does not freeze?
The reason may be poor-quality evacuation of the system, the presence of moisture in the freon, incorrect dosage of refrigerant, or an unreplaced filter-drier, which could have become clogged during an old breakdown.
How to understand that the control module has burned out?
Indicators may blink chaotically, the refrigerator may not respond to buttons, or, conversely, may never turn off. A cracking sound is often heard inside the control unit.
Is it worth repairing an old Atlant refrigerator?
If the age of the equipment exceeds 10-12 years and the compressor needs to be replaced or complex refilling with freon is required, it is more economically feasible to consider purchasing a new model. Repairs can amount to up to 70% of the cost of a new unit.