The situation when the refrigerator Atlant works without interruption is critical and requires immediate intervention by the owner. In normal operation, the motor-compressor turns on periodically, maintaining the set temperature, and then turns off to rest. Continuous operation technique indicates that the control system has lost the ability to control cooling cycles or a serious malfunction has occurred in the circuit.
If you notice that the unit is humming for days on end, and the products in the main chamber may be frozen or, conversely, begin to deteriorate, you cannot ignore this. Long-term work compressor wear leads to overheating of the windings, destruction of the piston group and, as a result, to expensive repairs or complete replacement of the unit. Timely diagnostics allows you to identify the problem at an early stage and often avoid serious financial costs.
In this article we will analyze in detail the main reasons why the refrigerator Atlant does not go into standby mode. We will look at both simple operating errors that you can fix yourself, and complex technical breakdowns that require the intervention of a specialist. Understanding the principles of operation thermostat and the refrigerant will help you quickly determine the source of the problem.
Problems with the thermostat and temperature sensors
The most common reason for the endless operation of the motor is an output from building a thermostat (thermostat). This mechanical or electronic component is responsible for monitoring the temperature inside the chambers. When the air cools to the set point, the thermostat opens the electrical circuit and the compressor stops. If the contacts stuck are in the closed position or the sensitive element has lost its properties, the signal to shutdown is simply not received.
In modern models Atlant with a system No Frost or electronic control, the role of a mechanical thermostat is performed by air temperature sensors. They transmit data to the electronic control module. If the sensor “lies” and shows that the chamber is still warm, the module will keep the compressor on. Sensor malfunction often accompanied by the appearance of an error code on the display, but not always.
⚠️ Attention: Trying to replace a thermostat or sensor without first testing it with a multimeter may result in you purchasing an unnecessary part. In some cases, the problem lies in the oxidation of the contacts of the wiring going to the sensor.
To check a mechanical thermostat, the exclusion method is often used: they disconnect the wires from it and close them directly (to check the circuit) or, conversely, open them. If the compressor stalls when the circuit is opened, it means that the motor itself is working, and the problem is in the regulator. Electronic sensors are checked by measuring them resistance at different temperatures, comparing the readings with a table for a specific model.
Refrigerant leakage and circuit failure
The second most common reason is freon leakage (refrigerant). The operating principle of the refrigerator is based on the circulation of gas in a closed loop. If a microcrack has formed in the tubes (often due to corrosion or mechanical damage during defrosting), the gas gradually evaporates. Pressure in the system falls, and the refrigerant ceases to effectively remove heat from the chambers.
As a result, the sensors record that the temperature has not dropped to normal and give a command compressor to work continuously. The motor tries to compensate for the lack of freon by intensive work, but physically cannot achieve the target values. Visually, this can be seen by the fact that capacitor array (on the back wall) remains cold or only partially heats up.
Leakage symptoms often develop gradually. First, the refrigerator begins to work longer than usual, then the pauses between starts are reduced, and eventually it stops turning off completely. Tightness of the system This is a basic condition for the operation of any refrigeration machine, and its violation requires professional intervention.
To find leaks, technicians use leak detectors or a painting method, and also check the system for vacuuming. Finding a leak on your own without equipment is almost impossible, since cracks can be microscopic. After eliminating the hole in the circuit, a strictly defined type and quantity is required. refilling with freon strictly defined type and quantity.
Malfunctions of the starting relay and compressor
The starting relay is responsible for starting the compressor engine and protecting its windings from overloads. If this small plastic block attached to the side of the motor is faulty, the contacts may not open in time. In this case, the current continues to flow to the windings, and the motor hums, being under constant voltage.
In addition, the compressor itself may have mechanical defects. Wear of the piston group, scuffing in the cylinder or loss of compression lead to the fact that the unit works, but does not pump freon with the required efficiency. The electronics or thermostat “see” that there is no cold and do not give a command to stop. Motor-compressor under such conditions it quickly overheats.
You can determine a relay malfunction by characteristic clicks when trying to start or, conversely, by their absence. Often the relay simply melts or oxidizes. Replacing this part is one of the simplest procedures in refrigerator repairthat you can do it yourself if you have basic skills.
If the problem is in the compressor itself (for example, an interturn short circuit), then its operation may be accompanied by a strong hum, vibration and a burning smell. In this case, simply replacing parts will not help; you will need to install a new unit unit.
The influence of the defrosting and freezing system
For models with an automatic defrosting system (No Frost), the condition of the defrost heater, timer or defrost control module is critical. If the defrost system does not work, a “coat” of ice builds up on the evaporator. This ice blocks the circulation of cold air, and the temperature sensor in the chamber does not register cooling.
The compressor works non-stop, trying to cool the volume that is actually isolated by the ice plug. In refrigerators Atlant with a drip defrosting system, a similar role is played by ice freezing on the back wall if the outflow of water is disrupted or the door seal is damaged.
Excessive freezing can also be caused by a loose door fit. If the seal (elastic band) is worn out, dirty or deformed, warm air constantly enters the chamber. The humidity condenses on the walls, freezes, and the compressor tries to compensate for the constant flow of heat continuous operation.
Checking the defrost system includes checking the heater and checking the resistance of the timer. A visual inspection of the evaporator (requiring disassembly of the rear panel in the freezer) will indicate the extent of icing. A thick layer of ice is a clear sign of a malfunction of the defrost circuit.
Operation errors and external factors
The reason does not always lie in the breakdown of parts. Often, users themselves create conditions under which the refrigerator Atlant cannot cycle normally. For example, installing the unit too close to a wall or heat source (battery, stove) disrupts heat transfer. The condenser does not have time to cool down, operating efficiency drops, and the compressor turns on more often.
Loading hot products into the chamber is another classic mistake. The thermostat detects a sharp jump in temperature and keeps the compressor turned on until the entire volume has cooled down. This creates extreme stress. Frequently opening the door or leaving it ajar also has an effect.
Incorrectly set temperature is a trivial but common reason. If you set the mode Super Freeze (super freeze) and forget to turn it off, the refrigerator will work constantly. In some models, this mode turns off automatically after a certain time, but in older ones Atlantas, it must be turned off manually.
⚠️ Attention: Never install the refrigerator in a niche without gaps for ventilation. The minimum distance to walls and furniture should be 5-10 cm, otherwise overheating of the compressor and its continuous operation are guaranteed.
Diagnostics and table of symptoms
To narrow down the troubleshooting, you need to carefully analyze the accompanying symptoms. The nature of the engine's operation, the presence or absence of cold, extraneous sounds - all these are clues for the master. Below is a table that helps classify the problem.
| Symptom | Probable cause | Required actions |
|---|---|---|
| The compressor hums, but does not start or stalls immediately | The starting relay is faulty or the compressor is jammed | Replacing the relay, checking the windings |
| The motor runs non-stop, there is no cold at all | Complete freon leak or clogged capillary tube | Search for leaks, evacuation, refueling |
| Works continuously, freezes weakly | Partial leak or compressor wear | Measuring pressure, checking compression |
| The refrigerator does not turn off, but freezes too much | The thermostat is faulty (contacts are stuck) | Replacing the thermostat |
| Buzzing, there is a block of ice on the evaporator | The defrosting system is faulty (heating element, timer, sensor) | Inspection of the No Frost system |
Diagnostics must be carried out sequentially. First, simple factors (modes, location) are excluded, then the electrical part is checked (thermostat, relay), and only then is the option with refrigerantconsidered, since this requires a special tool.
FAQ: Frequently Asked Questions
Is it possible operate the refrigerator if it does not turn off?
It is highly not recommended. Prolonged operation at maximum capacity leads to compressor combustion. If repairs are not possible right now, try temporarily reducing the load: reduce the temperature, open the door less often and provide additional air flow to the rear grille.
How long should the Atlant compressor normally work?
The operating time depends on the load and room temperature, but usually the cycle looks like this: 10-20 minutes of work and 20-40 minutes of rest. The working time ratio is approximately 30-40%. If the refrigerator works for 50 minutes and rests for 5, this is a pathology.
Why does the refrigerator not turn off for a long time after defrosting?
After complete defrosting, the unit must cool a large volume of warm air and food. During the first 3-5 hours of operation at maximum load, the compressor can operate almost without interruption. This is normal if after a few hours the cycle stabilizes.
The red light comes on, what should you do?
The red indicator on refrigerators Atlant usually signals an increased temperature in the chamber. If the compressor runs continuously, it means that it is trying to reduce the temperature, but cannot cope (leakage, wear) or does not receive the command to stop (thermostat).