The situation when the refrigerator Pozis stops turning off is critical for the durability of the unit and the safety of the products. Continuous operation of the compressor leads to overheating of the motor, increased energy consumption and, ultimately, to expensive repairs. Owners often notice a problem when an ice crust begins to form inside the chamber or food gets frozen.
Ignoring the first signs of a malfunction can lead to failure of the very heart of the refrigerator - compressor. If you notice that the unit is humming around the clock, do not panic. In most cases, the problem lies in violation of operating rules or failure of one of the sensors, which can be replaced.
In this article we will analyze in detail the main reasons why Pozis refrigerator does not turn off, and we will offer a step-by-step algorithm of actions. You will learn how to carry out initial diagnostics yourself and in what cases calling a specialist becomes inevitable. Understanding the principles of operation climate control will help you avoid mistakes.
⚠️ Attention: If you hear an extraneous metallic knock or smell a burning smell, immediately disconnect the device from the power supply. Further operation can be dangerous.
Primary diagnostics: checking simple causes
Before disassembling the back panel or calling a specialist, it is necessary to eliminate common operating errors. Often The refrigerator does not turn off due to the fact that the temperature inside the chamber cannot reach the set value for external reasons. Check whether it is too hot in the room where the equipment is located.
Inspect the rubber seals on the doors. If they are dirty, damaged, or simply do not fit tightly, warm air constantly enters the chamber. Compressor is forced to work in increased mode to compensate for the heat influx. This is the most common cause and can be easily eliminated.
- 🌡️ Check if the “Super Freeze” or “Maximum Cooling” mode is set.
- ❄️ Make sure that the food does not block the ventilation holes inside the chamber.
- 🚪 Check the tightness of the door closure using a sheet of paper.
☑️ Initial inspection of the refrigerator
It is also important to consider that if you have just loaded a large amount of warm food into Pozis or defrosted it, then long-term operation is a normal process of reaching the mode. However, if the equipment works for days without a break in normal mode, the problem is deeper.
Malfunctions of the thermostat (thermostat)
The thermostat is the “brain” that makes the decision to turn the motor on and off. If Pozis refrigerator does not turn off, there is a high probability that the contacts inside the thermostat are stuck in the “on” position. Mechanical models lose sensitivity over the years, and their capillary tube ceases to respond correctly to temperature changes.
In electronic models, the role of a thermostat is performed by a temperature sensor that transmits signals to the control module. If this sensor “lies” and shows that it is warm in the chamber, although it is already frosty there, compressor it will work endlessly. Diagnostics of an electronic sensor requires a multimeter and knowledge in electronics.
How to check a mechanical thermostat?
To check a mechanical thermostat, it can be temporarily replaced with a known good one or the contacts can be closed directly. If, when the contacts are closed, the motor starts, and when installing a new thermostat, the refrigerator begins to turn off, the reason has been found. However, be careful: direct closure of the contacts leaves the refrigerator without protection from overheating.
Replacing the thermostat is a procedure available to a home handyman. You must purchase a similar model with the same characteristics. It is important to install it correctly capillary tube into the evaporator so that it reads the temperature correctly. Incorrect installation will lead to a recurrence of the problem.
Problems with the control module and electronics
Modern refrigerators Pozis are equipped with complex electronics. If one of the elements on the control board burns out, it can send a constant signal to start the engine. In this case, relay on the board does not open the circuit, and the motor hums without stopping, even if the temperature sensors are working.
A frequent cause of failure of electronics is power surges in the network. Pulse noise the microcircuits that control the cycles can break through compressor operation. Visually, swollen capacitors or traces of burning are often visible on the board, but sometimes the defect is hidden.
| Symptom | Probable cause | Action |
|---|---|---|
| Lit all indicators | Control board failure | Reboot or replace the board |
| The refrigerator does not respond to buttons | Module malfunction | Diagnostics by an electrician |
| The engine hums, but does not start | Start relay or compressor | Replacing the start protection relay |
| Chaotic on/off | Problems with wiring | Checking contacts |
Repairing the control module requires specialized equipment. If you do not have the skills to solder and read electrical diagrams, it is better to entrust this work to professionals. Independent repair attempts can lead to the final failure of electronic unit electronic unit
Freon leak and circuit leakage
One of the most insidious reasons for continuous operation is a refrigerant leak. When the system becomes low freon, the pressure drops and the temperature sensor (or thermostat) records that the desired temperature has not been reached. The compressor tries to compensate for the lack of cold, working to wear out.
A leak can occur anywhere in the circuit: in the foamed part of the housing, in the evaporator or at the joints of the tubes. Often a sign of a leak is a bulging side wall of the refrigerator or the appearance of rust at the site of damage. If Pozis works without stopping, but the cooling is weak or only in one corner, this is a sure sign of a lack of gas.
⚠️ Attention: Freon is a gas that requires professional injection. Self-refueling without finding and eliminating the leak is a temporary measure that will only delay the breakdown.
The process of restoring the tightness includes finding the leak using a leak detector, sealing the hole and evacuating the system. Only after this is filling done refrigerant strictly by weight. Violation of the charging technology will lead to rapid failure of the compressor.
Clogged capillary tubes and filtration systems
A blockage may form in the freon circulation system. Most often, the capillary tube or filter drier becomes clogged. This occurs due to moisture entering the circuit or oil breakdown products. If there is a blockage pressure the system changes sharply, and the compressor cannot pump the refrigerant.
The symptoms of a blockage are similar to a leak: the refrigerator runs constantly, but there is no cold. In this case, the condenser (grid at the back) can be only partially hot or cold. In this case, the motor can become very hot and hum loudly, trying to overcome the resistance of the plug.
Removing the blockage requires purging the system with nitrogen under high pressure and replacing the filter-drier. This is a complex technical procedure that cannot be performed without a compressor and a vacuum pump. Attempts to break through the blockage by adding oil or other liquids can completely “kill” the compressor.
Wear of the compressor and start relay
The most expensive breakdown is the wear of the compressor itself. If motor has exhausted its service life, its valves may stick and the windings may burn out. In this state, it may hum, but not create enough pressure to circulate freon. The sensors “see” the absence of cold and do not give a command to stop.
It is also worth paying attention to the start-protection relay. If its contacts are burnt, it may not open the power circuit after starting the engine. In this case, current continues to flow to the windings, which is fraught with overheating and fire. Relay is a consumable item, and its replacement is inexpensive.
- 🔊 A loud knock or clanging noise during operation indicates mechanical wear compressor.
- 🔥 Strong heating of the motor housing (more than 90°C) is a sign of overload.
- ⚡ Frequent clicks when trying to start indicate a problem with the relay.
If the diagnostics showed a faulty compressor, it is more economically feasible to replace the entire unit, especially if the refrigerator more than 10 years. The cost of a new motor and work to replace it is often 50-70% of the price of a new one. Pozis.
When you need to call a technician
If simple testing methods did not help, and The refrigerator Pozis continues to work without interruption, professional diagnostics are required. This is especially true when it is necessary to open a sealed circuit or repair electronics. The technician has tools for measuring pressure and current consumption.
Calling a specialist is necessary if you notice oil under the refrigerator, hear the hissing of gas or smell a specific smell. These symptoms indicate depressurization that cannot be ignored. Delay can lead to complete failure of the equipment.
⚠️ Attention: Refrigerator manufacturers may change the design features of their models. Before ordering spare parts, check the article numbers with technical documentation or consult with official representatives.
Regular maintenance, cleaning the condenser from dust and monitoring the condition of the seals will help avoid serious breakdowns. Remember that refrigerator is a technique that works 24/7, and prevention is more important for it than for any other household appliance in the house.
How much does repair cost?
The cost of repair depends on the model and the malfunction. Replacing the thermostat will cost less than refilling with freon or replacing the compressor. The exact price can only be found out after on-site diagnostics.
Why does the refrigerator freeze too much and does not turn off?
This is a classic sign of a malfunctioning thermostat or temperature sensor. They “do not see” that the cold has already been reached, and continue to issue the command to cool down. It is also possible that the damper in the No Frost system gets stuck.
Is it possible to operate the refrigerator if it does not turn off?
Short-term - yes, but this will lead to excessive energy consumption and accelerated wear of the compressor. Long-term operation without stopping (a day or more) is unacceptable and leads to breakdown.
How often should a working refrigerator turn off?
In normal operation, the cycle is approximately 15-20 minutes of work and 30-40 minutes of rest. The frequency depends on the load of the chambers, the room temperature and the set mode.
Does the temperature in the room affect the operation of the refrigerator?
Yes, if the room is hot (above +30°C), heat transfer worsens and the compressor is forced to work longer. Also, you should not place the refrigerator close to the wall or radiator.