The situation when a two-chamber refrigerator Atlant stops turning off is familiar to many owners of this popular Belarusian equipment. The unit hums for days, trying to reach the set temperature, but the compressor does not go into rest mode. This not only leads to a significant waste of electricity, but also creates constant background noise that interferes with comfortable living.
The constant operation of the motor-compressor is a signal that the thermoregulation system is malfunctioning or the tightness of the circuit is broken. Ignoring the problem in the early stages it can lead to overheating motor windings and expensive repairs. In this article we will analyze in detail why this happens and how to diagnose the malfunction yourself.
It is important to understand that two-chamber models have their own operating characteristics that differ from single-chamber analogs. Here the cooling zones are separated, and disruption of air or refrigerant circulation in one circuit can affect the operation of the entire system. Let's figure out what exactly makes your refrigerator work non-stop.
⚠️ Attention: If you smell burning or see sparking in the compressor area, immediately disconnect the appliance from the power supply. Further operation in this condition is strictly prohibited.
Malfunctions of the thermostat and temperature sensors
The most common reason for the continuous operation of the refrigerator Atlant is the failure of the thermostat. This unit is responsible for monitoring the temperature inside the chambers and sends a signal to turn off the compressor when a specified threshold is reached. If the thermostat contacts are stuck in the “on” position or the capillary tube has lost sensitivity, the motor will run indefinitely.
Models with electronic control (No Frost) use temperature sensorsinstead of a mechanical thermostat. They may give erroneous readings due to oxidation of contacts or damaged wiring. The electronic control module, receiving incorrect data that the chamber is warm, continues to drive the compressor, trying to cool the space.
- 🔍 Mechanical thermostat: checked by checking the contacts when the temperature of the sensing element changes.
- 🌡️ Electronic sensor: requires measuring the resistance with a multimeter and comparing it with a table of values.
- 🔌 Wiring: oxidized connectors can create false resistance, distorting the signal.
Diagnostics of the thermostat at home is possible, but requires caution. It is necessary to remove the casing, find the thermostat and carefully remove the terminals from it. If during dialing the contacts ring constantly, regardless of temperature, the part must be replaced. In electronic models, resetting errors often helps, but if the sensor is physically damaged, it will need to be replaced.
How to check the thermostat without instruments?
Place the thermostat sensitive tube in a container with snow or very cold water. If after 15-20 minutes there is no click and the contacts do not open, the thermostat is faulty.
Refrigerant leak and problems with the circulation system
The second most common reason why Atlant refrigerator does not turn off is a freon leak. The refrigerant circulates in a closed circuit, taking heat from the chambers and releasing it into the environment. If the seal is broken (microcracks in the tubes, corrosion of the evaporator), the amount of gas decreases and the pressure in the system drops.
The compressor begins to wear out, trying to compensate for the lack of refrigerant and reach the desired temperature. However, no matter how much he works, the desired cold does not come. As a result, you observe a continuous hum of the motor, but the food in the chamber may remain warm or defrost.
| Symptom | Probable cause | Action |
|---|---|---|
| Hot condenser | System clogged or pumping | Call a technician |
| Cold condenser | Freon leak | Search for leaks, refill |
| Noise seething | Lack of refrigerant | Circuit diagnostics |
| Frost on the tube of the compressor | Liquid freon got in | Adjusting or replacing the expansion valve |
It is difficult to find the location of the leak on your own, as it can be microscopic. Often the gas escapes through the foamed part of the housing where the evaporator is located. If you notice that the back wall of the freezer is no longer covered with frost evenly, or, conversely, a “fur coat” has appeared in only one corner, this is a sure sign of problems with circulation.
Wear of the compressor and start relay
The compressor motor is the heart of the refrigerator Atlant. Over time, its resource is exhausted. The piston group wears out, compression drops, and the unit loses the ability to create the necessary pressure for effective circulation of freon. In an attempt to compensate for low performance, the engine runs without interruption.
Another important element is starting relay. It is responsible for starting the engine and protecting against overloads. If the relay is “stuck” or its contacts are burnt, the compressor may not receive a signal to stop or, on the contrary, it may constantly try to start, humming and clicking. In some cases, a faulty relay passes current constantly without breaking the circuit.
Checking the compressor requires special skills and tools, such as a pressure gauge station. However, primary diagnosis can be made visually and auditorily. If the motor is running, but the outlet and inlet tubes are at the same temperature, or if it is excessively hot (more than 80-90 degrees), this indicates that it is not operating efficiently.
⚠️ Attention: Replacing a compressor is a complex procedure that requires evacuation of the system and precise dosage of oil and freon. It should only be performed by a certified specialist.
Violation of the seal of the chamber and problems with the seal
Often the reason lies not in the internal mechanisms, but in a banal violation of the seal of the refrigeration chamber. If the rubber seal on the door is worn out, dirty or deformed, warm air from the room constantly enters the chamber. Sensors detect an increase in temperature and command the compressor to work continuously.
You can check the tightness of the door in a simple way. Take a sheet of paper, clamp it with the door and try to pull it out. If the sheet is pulled out easily and without resistance along the entire perimeter, it means that the seal does not fit tightly. It is also worth checking the hinges: if the door is skewed, the tightness is broken even with the seal intact.
- 🧹 Contamination: grease and dirt on the seal prevent a tight fit.
- 🔥 Deformation: the rubber could have dried out due to time or heat.
- 🔧 Hinges: loosening the fastenings leads to the door being skewed.
In two-chamber models Atlant it is important to check the tightness of both chambers. Sometimes the problem occurs because the freezer door is not fully slammed, or a foreign object is stuck between the door and the body (for example, the edge of a bag of groceries).
☑️ Checking the seal
The influence of external factors and operating conditions
Do not discount the conditions in which the refrigerator is operated. If the unit is installed too close to a wall, a heating radiator, or in direct sunlight, the cooling system is overloaded. Heat transfer is disrupted, the hot air has nowhere to escape, and the compressor is forced to work constantly.
The room temperature is also critically important. Standard refrigerators Atlant are designed to operate in climate class SN-T (from +10 to +38 °C). If the room is too hot (above +30 °C), the refrigerator may simply not cope with the load and work non-stop. The same thing happens if the device is in a draft or in an unheated room in winter.
Another factor is a large number of warm products loaded into the chamber at a time. The motor will run for a long time to cool the volume, but it should eventually turn off. If you have loaded half the chamber with warm food, the process may take several hours, which is normal for such conditions.
⚠️ Attention: Do not install the refrigerator closer than 5-7 cm from the back wall. This minimum distance is necessary for free air circulation around the condenser.
Errors in settings and operating modes
Sometimes users themselves inadvertently configure the equipment for constant operation. In models with electronic control, you can accidentally activate the Super Freeze (Super Freeze) or Super Coolmode. In this mode, the compressor operates continuously, ignoring sensor readings, in order to freeze food as quickly as possible.
Usually this mode turns off automatically after a certain time (for example, 24-48 hours) or manually. If you see the snowflake or star light on, check your settings. It is also worth making sure that the temperature settings are not reset - setting the minimum temperature (+2...+3°C in the refrigerator compartment) makes the motor work more often and longer.
What is Super Freeze?
This is an intensive freezing mode in which the compressor works without stopping. It is designed for quick freezing of large quantities of fresh food, but not for constant use.
In some cases, the electronic control module may fail. Failures in the software or power surges in the network lead to the fact that the “brains” of the refrigerator stop processing signals correctly and give a command for continuous operation.
FAQ: Frequently Asked Questions
How long can the Atlant refrigerator work without stopping?
In normal mode, the operating cycle is about 20-40 minutes, followed by a pause of the same duration. If the refrigerator works for more than 2-3 hours in a row without a break, especially in an empty chamber, this is a cause for concern.
Is it possible to use the refrigerator if it does not turn off?
For a short time - yes, so that the food does not disappear. However, prolonged operation in this mode will lead to overheating of the compressor, melting of the insulation and eventual combustion of the engine. It is better to call a specialist.
Why does the refrigerator not turn off for a long time after defrosting?
After complete defrosting and loading a large volume of food, the refrigerator takes time (up to 24 hours) to return to operating mode. If the chamber is empty and empty, and the motor hums for hours, this is a malfunction.
The compressor tube is frozen, what should I do?
This is a sign that liquid freon is getting into the compressor, which can cause water hammer. It is necessary to turn off the refrigerator and call a technician to check the thermostat or the charging cycle.
Does the voltage in the network affect the operation of the compressor?
Yes, low or unstable voltage can lead to the fact that the starting relay will not open the circuit or the compressor will work with overload, not developing the required power.