The situation when a two-chamber Pozis refrigerator hums continuously, ignoring rest cycles, often causes panic among owners. It seems that the equipment is about to burn out or has already completely broken down, requiring an expensive visit from a technician. However, you should not get upset right away, since in many cases the problem lies in banal settings or a temporary failure of the electronics.
The constant operation of the compressor indicates that the control system receives a signal about insufficient temperature inside the chambers. Engine it tries to compensate for heat inflows, but due to a malfunction of some component it cannot achieve the set parameters. This leads to excessive consumption of electricity and accelerated wear of the main units.
In this article we will analyze in detail why Pozis refrigerator stopped turning off, and what steps need to be taken for diagnosis. We will consider both external factors and internal breakdowns characteristic of two-chamber models of this brand.
External factors and improper operation
Before disassembling the equipment, it is worth excluding simple reasons related to the conditions of use. Often users themselves create conditions under which the unit cannot enter the operating cycle. For example, if you have just loaded a large amount of warm food into the chambers, the compressor will work hard, trying to cool the entire volume.
The position of the refrigerator itself is also critically important. If it is placed close to a wall or furniture, the air circulation around the condenser (the black grille at the back) is impaired and the system cannot effectively reduce the temperature, which forces the motor to work without interruption. Check if there is a gap between the back wall and the furniture. Heat transfer deteriorates and the system cannot effectively reset the temperature, causing the motor to run continuously. Check if there is a gap between the back wall and the furniture.
Another common cause is a door that is not tightly closed or a damaged seal. In two-chamber Pozis models, even a small gap leads to a constant flow of warm, moist air. Sensors record the increase in temperature and give a command for continuous cooling.
- 🔍 Check whether a foreign object is preventing the door from closing tightly.
- 🌡️ Make sure that the room temperature does not exceed +30°C, otherwise the equipment may not cope.
- 🚪 Wipe the rubber seal and check it for cracks or creases.
⚠️ Attention: If you notice that the rubber door seal has come off or has lost elasticity, try heating it with a hairdryer or replacing it. A loose fit is one of the main reasons for the formation of a “fur coat” and continuous operation of the motor.
Do not forget about the fast freezing mode. Some Pozis models have a “Super Freeze” function, which forcibly disables the automatic shutdown of the compressor. If you accidentally activated this mode, the indicator may be on and the refrigerator humming for days.
Malfunctions of the defrost system and sensors
Modern two-chamber Pozis refrigerators are often equipped with a No Frost system or a drip defrosting system. If an ice build-up has formed on the evaporator in the freezer, the temperature sensor will “think” that it is not cold enough. It sends a signal to the controller, and the compressor continues to work.
Most often the culprit is defrost sensor or the heating element of the evaporator. If the heating element is burnt out, the ice does not melt, the air channels become clogged, and cold air stops flowing into the refrigerator compartment. As a result, the motor works constantly, trying to cool the main chamber, but to no avail.
It is also worth paying attention to the air temperature sensor. If it fails and shows incorrect values (for example, that the chamber is +10°C instead of the real +4°C), the system will try to reduce the temperature to impossible values. Replacing the sensor usually solves the problem.
Symptoms of a malfunctioning defrost system
Inside the freezer, a layer of snow or ice is visible on the back wall, but the food does not freeze evenly. You can hear the cracking of ice during operation.
To check the defrosting system, complete defrosting of the unit is often required. Leave the refrigerator turned off for a day with the doors open. If, after turning it on, it starts working in normal cyclic mode, and after a few days the problem returns, the problem is definitely in the defrost system.
Problems with the thermostat and electronics
In models with mechanical control, the thermostat (thermostat) is responsible for turning the compressor on and off. This device physically opens the electrical circuit when the desired temperature is reached. If the contacts of the thermostat are “stuck” or it fails, the circuit does not open and hums continuously. motor-compressor buzzes continuously.
In Pozis refrigerators with electronic control (where the temperature is set by buttons on the display), the role of a thermostat is performed by an electronic control module. Malfunctions in its operation can be caused by power surges in the network. The electronics “freezes” and does not send a signal to stop the engine.
Diagnostics of the thermostat at home is possible, but requires caution. It is usually located inside the refrigerator compartment or behind the control panel. If when you turn the control knob to the “Off” or “0” position, the motor does not stop, the thermostat is faulty.
- 🔧 Check whether the compressor responds to turning the thermostat knob.
- ⚡ Try to completely turn off the power to the refrigerator for 15-20 minutes to reboot the electronics.
- 📉 Set the minimum temperature and listen to see if the nature of the motor operation changes.
If you have a model with an electronic module, pay attention to the indication. Flashing symbols or errors on the display may indicate a specific faulty part. The instructions for Pozis refrigerator usually contain a decoding of error codes.
☑️ Diagnostics of the thermostat
⚠️ Warning: When working with electric components such as a thermostat or control module, be sure to unplug the refrigerator. Electric shock can cause serious injury.
Refrigerant Leaks and Compressor Problems
One of the most serious causes of continuous operation is a freon leak. When the amount of refrigerant in the system drops, the pressure decreases and the compressor cannot reach the required cut-out temperature. It runs “idle”, trying to compensate for the lack of working fluid.
When freon leaks, the following picture is often observed: the condenser (grid at the back) remains only partially cold or warm, and there is no ice in the freezer. In this case, the compressor may be hotter than usual, since it works without interruption and overheats.
Another problem is the loss of performance of the compressor itself. If the valves inside the motor are worn out, it will not produce the required pressure. In this case refrigeration unit it hums, but does not cool, and the sensors do not give a command to stop.
| Symptom | Probable cause | Necessary actions |
|---|---|---|
| Compressor is hot, grille is cold | Freon leak | Call a technician to find a leak and refill |
| The engine hums, but clicks and does not start | Malfunction of the start relay | Replacement of the start-protection relay |
| The refrigerator works, but does not freeze well | Clogged capillary tube | Cleaning the system or replacing filter-drier |
| Strong vibration and noise | Wear of the compressor | Replacing the compressor |
It is extremely difficult to independently eliminate a freon leak or replace the compressor without special equipment. To do this, you need a vacuum pump, a pressure gauge station and skills in soldering copper pipes. An attempt to refill freon yourself without eliminating the leak will only give a temporary effect.
The influence of the environment and placement
The location of the refrigerator plays a huge role in its energy efficiency and operating mode. If the unit is located next to a radiator, stove, or in direct sunlight, the heat gain becomes too large. Two-chamber Posis simply does not have time to cool in between cycles.
It is also important to take into account the temperature in the room. Most refrigerators are designed to operate in climate class SN-T (from +10 to +38°C). If the room is unheated in winter and the temperature drops below +10°C, the oil in the compressor thickens, and the thermostat may not read the temperature correctly.
In the summer, when the apartment is +30°C and above, the refrigerator may also work longer than usual. This is not a breakdown, but a physical feature: the temperature difference between inside and outside is large, and thermal insulation is not ideal.
Check that the refrigerator is not on a sloping floor. If the unit is skewed, the door may not close completely on its own, even if you think it is closed. Use a building level to check the horizontal position.
Self-diagnosis algorithm
If your Pozis refrigerator stops turning off, do not rush to call a technician right away. Conduct an initial diagnosis that will help you understand the scale of the problem. This will save time and money, and in some cases will allow you to fix the problem yourself.
Start with a visual inspection and listening. Assess how hot the compressor is, whether there is ice in the freezer, and whether the doors are closed tightly. Then try defrosting the unit completely. This will eliminate problems with the defrosting system.
If after defrosting and checking the placement conditions the problem persists, most likely the issue is a technical malfunction: sensors, thermostat or freon leak. In this case, professional repairs will be required.
⚠️ Attention: Characteristics and design features may vary depending on the specific Pozis model. Always check the technical documentation of your device before starting work.
Frequently asked questions (FAQ)
Can a Pozis refrigerator work without stopping due to a clogged filter?
Yes, if there is a circulation system The filter drier or capillary tube is clogged with refrigerant, the pressure drops, and the compressor runs continuously, trying to pump freon. This requires cleaning the system by a technician.
Why, after defrosting, did the refrigerator start working again without interruption after a couple of days?
This is a classic sign of a malfunction of the defrost system (heating element, defrost sensor or timer). Ice accumulates again on the evaporator, blocking the cold, and the temperature sensor causes the motor to run constantly.
Is it normal for a new refrigerator to run for a long time when first turned on?
Yes, when first started or after long-term transportation Pozis refrigerator it may take 6 to 12 hours to reach operating temperature. At this time, it may not turn off - this is normal.
How to check whether the door seal is holding?
Pinch a sheet of paper between the door and the body in different places. If the sheet is pulled out easily without resistance, it means that the seal does not fit in this place and requires adjustment or replacement.
What to do if the compressor is very hot to the touch?
A hot compressor (up to 80-90°C) during continuous operation is a consequence, not a cause. We need to find why it does not turn off (leakage, thermostat, heat gain). Let it cool before turning it back on.