The situation when a brand's two-chamber refrigerator Atlant stops turning off is a common problem faced by owners of this equipment. The compressor starts working continuously, hums and does not go into rest mode, which leads to significant waste of electricity and rapid wear of the motor. If you ignore this signal, after some time the unit may completely fail, requiring expensive major repairs or replacement.
The reasons for this behavior of household appliances can vary from a banal violation of operating rules to a serious breakdown of the internal components of the cooling system. In some cases, the user is able to fix the problem on his own without resorting to the help of a technician. However, if the problem lies in a mechanical breakdown or leak of freon, qualified intervention and the use of specialized equipment will be required.
In this article we will analyze in detail the main factors affecting the cyclic operation of the compressor and action algorithms for eliminating them. You will learn how to distinguish a false alarm from a real breakdown, which components to pay attention to first and why Continuous operation the engine is dangerous for the refrigerator itself. Competent diagnostics at an early stage will help save products and budget.
Primary diagnostics and leak testing
Before disassembling the unit or calling a technician, it is necessary to exclude external factors that often simulate a serious breakdown. The most common reason is a leak in the chamber. If the door does not fit tightly, warm air from the room constantly enters the chamber. Sensors detect an increase in temperature and command the compressor to work without stopping to compensate for the heat gain.
Carefully inspect sealing rubber around the perimeter of the door. It should not have cracks, creases or dirt that would prevent a tight fit. Often the rubber is simply contaminated with crumbs or grease, which causes micro-gaps to form. Also check whether (for example, the edge of a shelf or product packaging) does not interfere with the tight closure of the door.
☑️ Checking the tightness
There is a simple leak test that can be done at home without tools. Take a regular sheet of paper, clamp it with the refrigerator door so that part of the sheet remains outside, and try to pull it out. If the sheet is removed easily and without resistance, it means that the seal does not fit tightly in this place. Walk this way around the entire perimeter.
⚠️ Attention: If the door is skewed and does not fit even after adjusting the hinges, the refrigerator cannot be used. This will lead to freezing of the evaporator and failure of the compressor due to overload.
Another important aspect is the temperature of the products that you load into the chamber. If you put a large pot of hot soup into an already working refrigerator or defrosted meat at room temperature, the unit will work in enhanced mode until the volume cools down to the specified parameters. This is a normal reaction of the system, and not a breakdown.
Problems with the thermostat and temperature sensors
The thermostat (thermostat) is the “brain” of the system for controlling the on and off cycles. It is he who reads the temperature inside the chamber and opens the electrical circuit when the desired cold is achieved. In two-chamber models Atlant mechanical thermostats are often used, which over time can lose calibration or stick.
If the contacts inside the thermostat are “stuck” in a closed state, the compressor will receive power constantly, regardless of the actual temperature in the chamber. This can be determined if the unit clearly freezes food, but does not turn off. In models with electronic control, this process is responsible temperature sensor, which may give incorrect readings due to oxidation of contacts or damage to the wiring.
How to check a thermostat with a multimeter?
To check a mechanical thermostat, it must be removed. In a warm state, the contacts should be open (if it is a normally closed type) or closed. When the sensor is placed in a cold place (for example, in a freezer), the state of the contacts should change. If there are no changes, the part is faulty and requires replacement.
Symptoms of a malfunctioning thermostat often manifest themselves in the form of chaotic operation or a complete absence of shutdown cycles. Sometimes a temporary solution helps: if you gently tap the regulator or slightly turn the temperature setting knob back and forth, the stuck contacts may come apart. However, this is only a temporary measure, and the part will still have to be changed.
- 🔍 Signs of failure: The refrigerator freezes too much, a “fur coat” forms on the back wall, the motor does not stop.
- 🔧 Actions: try changing the temperature setting. If there is no reaction, the thermostat is probably faulty.
- ❄️ Nuance: in two-chamber models there are often two thermostats (for cold and for freezing), check both.
Faults in the start-up relay and compressor
The starting protection relay is responsible for starting the engine and protecting its windings from overheating. If this element fails, it may not open the power circuit, even when the compressor is already hot and should be resting. This can be visually determined by the characteristic click when trying to start or its absence, as well as by the appearance of the relay itself (melted body, burning smell).
The compressor itself can also be the cause of the problem. When the piston group wears out or wears out mechanically, the motor loses its performance. It works, hums, but does not create enough pressure in the system. As a result, freon circulates, but does not cool the chamber to the required temperature, and the sensor does not give a command to stop. The motor runs “idle”, trying to compensate for the lack of power.
You can determine the loss of compressor performance by touching the condenser (the grille at the back or on the sides). If the refrigerator has been running for several hours, the rack should be warm or hot evenly. If it is cold or heats up only at the inlet/outlet of the tubes, and the compressor is hot and humming, this is a sign of mechanical malfunction motor or problems with the circulation system.
⚠️ Attention: Replacing the start relay is a simple procedure, but requires disconnecting the device from the network. If you do not have the skills to work with electricity, it is better to entrust this to a specialist, as there is a risk of a short circuit.
Refrigerant leakage and system blockage
One of the most serious reasons for continuous operation is a freon (refrigerant) leak. If a microcrack has formed in the circuit, the gas gradually evaporates. It becomes insufficient for effective heat exchange. The compressor tries to compensate for the lack of refrigerant by continuous operation, but the temperature in the chamber either does not drop at all or drops very slowly.
The second option for a hydraulic problem is Clogged capillary tube. Oil oxidation products or moisture may accumulate in the circulation system, which turns into an ice plug. This prevents the normal flow of freon. The pressure at the outlet of the compressor increases, and the refrigerant does not flow into the evaporator in the required volume.
| Symptom | Freon leak | Clogged system |
|---|---|---|
| Temperature in the chamber | Does not fall or falls very slowly | May be normal in one chamber, but absent in another |
| Condenser (grid) | Cold or warm only in compressor | Hot to the point of blockage, then cold |
| Evaporator | Clean, without ice | Partial freezing or swelling |
| Sound operation | The motor runs quietly, without gurgling | Gurgling or whistling may be heard |
Diagnosis of these problems at home is limited. You may notice that the refrigerator has stopped freezing, but the compressor is humming. The technicians find the exact location of the leak or blockage using a leak detector or exclusion method. Repair in such cases requires vacuuming the system, replacing the filter-drier and refilling with new freon.
The influence of the “Super Freeze” mode and the electronic unit
In modern models Atlant with electronic control, the reason for continuous operation is often the activated “Super Freeze” mode. In this mode, the refrigerator forces the compressor to cycle off for a specified amount of time (usually up to 72 hours) to quickly freeze large quantities of food. After the time has expired or the mode has been manually turned off, operation should return to normal.
If the mode is turned off and the refrigerator continues to operate without interruption, the problem may lie in the electronic control module. The control board could have malfunctioned due to a power surge, and the relay controlling the compressor remained in the closed state. It is also possible that the contacts on the board itself or in the connectors connecting the module to the sensors may oxidize.
To reset an electronics error, a complete system reboot often helps. You need to unplug the refrigerator, wait 15–20 minutes, and then turn it on again. If the problem was a software glitch, the cyclical operation will be restored. If not, the module needs to be diagnosed by a specialist.
The consequences of ignoring the problem and when to call a technician
Operating a refrigerator that does not turn off carries serious risks. Constant operation of the compressor leads to overheating. The engine oil circulating in the system begins to lose its lubricating properties, which accelerates the wear of rubbing parts. Ultimately, the compressor will jam, and replacing it will cost much more than timely repairs.
In addition, continuous operation leads to freezing of the evaporator. The ice crust grows so quickly that it blocks the air circulation channels. In a No Frost system, this can lead to damage to the fan or defrost heater. In drip systems, ice can damage the plastic elements of the chamber.
Independent repair makes sense only in cases of replacing the thermostat, relay or seal. All manipulations associated with a sealed circuit (compressor replacement, leak detection, freon refilling) require professional tools: a vacuum pump, a pressure gauge station, a burner and scales for dosing the refrigerant.
- 🆘 Call a technician if: a metallic knock is heard in the compressor, a smell of burnt wiring has appeared, or the problem has not disappeared after defrosting.
- 💸 Savings: Calling a technician at the first sign of a malfunction is often cheaper than replacing a burnt-out motor.
- 📜 Warranty: if the refrigerator is under warranty, any independent repair will deprive you of the right to free service.
⚠️ Attention: Technical characteristics and location of components may vary depending on the specific series of Atlant refrigerators. Before starting work, check the technical documentation of your model.
Is it possible to operate a refrigerator if it does not turn off, but freezes?
Short-term operation is possible, but undesirable. If the refrigerator does not turn off for more than 12–24 hours, this is already an emergency mode. Prolonged operation will lead to overheating of the compressor and eventual breakdown. It is better to find the cause and eliminate it or limit the use of the device.
Why did the Atlant refrigerator start to work louder and not turn off?
Increased noise in combination with continuous operation often indicates a loss of compressor performance (wear) or problems with the start relay. Noise can also occur due to vibration of tubes or fan operation if the system is covered with ice due to a defrosting malfunction.
How often should a working refrigerator turn off?
Under normal conditions, a working refrigerator works cyclically: it works for about 10-20 minutes and rests for 20-40 minutes. The ratio of work and rest time depends on the chamber load, room temperature and frequency of door opening. If the operating cycle is more than 50-60 minutes without a break, this is a cause for concern.
Does summer heat affect the operating time of the refrigerator?
Yes, in hot weather the heat exchange of the condenser with the environment worsens. The compressor has to work longer to remove the heat. However, even in summer it should go into rest mode, although the work time may increase and the rest time may decrease. A complete lack of shutdown, even in summer, is not the norm.