Owners of household appliances are often faced with a situation when the refrigerator Pozis begins to make unusual sounds. A hum, knocking, gurgling or whistling can signal both a normal working process and a serious breakdown that requires the intervention of a technician. Understanding the nature of these sounds helps to distinguish the normal operation of the equipment from critical malfunctions.
The Russian brand Pozis is known for its reliability, but even time-tested models may require attention. In this article, we will analyze in detail the mechanics of noise, self-diagnosis methods, and situations where you cannot do without calling a specialist.
Ignoring extraneous sounds can lead to increased energy consumption and accelerated wear of unit components. Therefore, it is important to determine the source of the problem in a timely manner and take appropriate measures.
Normal operating noise and its characteristics
Modern Pozis refrigerators, especially models with the system No Frost, emit a number of sounds in normal mode. Compressor when starting and operating, it emits a uniform hum, which can intensify at the moment inclusions. This is due to the operation of the electric motor and the circulation of freon through the system.
You can also often hear a quiet gurgling or pouring of liquid. This normal movement of refrigerant through the tubes of the evaporator and condenser, which occurs even when turned off for some time after stopping the engine. The sounds may be more distinct if the refrigerator is not level.
In models with automatic defrosting, crackling or clicking noises are periodically heard. This is a consequence of thermal expansion of the plastic and metal of the internal elements of the chamber. In addition, in units with No Frost the fan periodically turns on, creating a characteristic noise of air flow.
⚠️ Attention: If after installing a new refrigerator you hear a loud metallic clang, check the shipping bolts and packaging. Sometimes there may be fixing parts inside the compressor that need to be removed before turning it on for the first time.
Installation problems and housing vibration
One of the most common causes of increased noise is improper installation. If the housing touches a wall or furniture, vibration from the running compressor is transmitted to the surface, creating a resonating hum. This is especially true for built-in models or units moved close to the kitchen unit.
The second critical factor is the horizontal installation. The refrigerator legs should be adjusted so that the doors close on their own when slightly opened. Skewed housing leads to uneven load on the frame and compressor, which causes rattling.
- 🔍 Check the gap between the back wall of the refrigerator and the wall (should be at least 5-10 cm).
- 🔍 Make sure that nothing inside the chambers touches the walls and does not rattle from vibrations.
- 🔍 Inspect the shelves and drawers - loose elements may make noise when the motor is running.
To eliminate noise, you need to adjust the support legs. They usually have threads that allow you to change the height. Use a building level or simply observe the behavior of the door to align the unit perfectly level.
Malfunctions of the compressor and start relay
If the refrigerator hums louder than usual, the problem may lie in compressor. This is the heart of the refrigeration machine, and its wear or breakdown leads to a change in the acoustic profile of the operation. A loud knock during startup often indicates a faulty start relay or wear of the piston group.
In models with an inverter compressor, the noise should be minimal, as they operate smoothly, without sudden starts. If the inverter Pozis starts to hum or vibrate, this is a sure sign of imbalance or problems with the control electronics.
Traditional linear compressors can knock due to loose internal shock absorber mountings. Over time, the rubber gaskets dry out, and metal begins to come into contact with metal at each stroke.
| Sound type | Probable cause | Urgency of repair |
|---|---|---|
| Monotonous hum | Normal operation or overload | Low |
| Loud knocking at start | Start relay or compressor | Medium |
| Metal clanging | Destruction of internal parts | High |
| Intermittent beep | Attempts to start and shutdown | High |
⚠️ Attention: If the compressor buzzes, but does not start, and after a few seconds there is a click and silence - immediately disconnect the device from the network. This is a sign of a “wedge” of the motor or a malfunction of the relay, and further attempts to turn on may lead to burnout of the winding.
Is it possible to replace the compressor yourself?
Replacing the compressor requires special equipment (vacuum pump, burner, pressure gauges) and copper soldering skills tubes Replacing it yourself without experience will lead to freon leakage and moisture entering the system, which will completely damage the refrigerator.
Fan noise in the No Frost system
In Pozis refrigerators with the system No Frost the fan is responsible for the circulation of cold air. Over time, the fan motor bearings can wear out, causing a spinning, humming, or whistling sound. Noise can also occur if the blades touch frozen ice.
Often owners notice that the sound appears immediately after opening the door and disappears when it is closed. This is due to the design: in many models, the fan stops when the door is opened. If the noise is heard at this very moment, then the problem is in the fan motor.
Ice freezing on the evaporator can also cause a crackling noise. Ice crust can interfere with the rotation of the blades, creating a characteristic crunch. In this case, complete defrosting of the refrigerator is required within 24 hours.
- ❄️ Check to see if ice has frozen in the freezer compartment on the back wall.
- ❄️ Listen to whether the nature of the sound changes when you open the door.
- ❄️ Clean the drainage hole, if it is clogged, moisture may freeze in the fan area.
If defrosting does not help, the fan will need to be replaced. This is a simple procedure, but it requires access to the evaporator, which is usually hidden behind a plastic panel in the freezer.
☑️ Fan diagnostics
Foreign objects and rattling of parts
Sometimes the source of noise turns out to be banal - a foreign object. Bottles, cans or bags that are close to each other may touch and rattle due to microvibration of the shelves. It is also worth checking the contents of the door compartments.
The internal elements of the refrigerator itself can also become a source of sound. Loose screws securing shelves, plastic panels or condenser grilles (on the outside rear wall) begin to emit irritating rattling noises when the case vibrates.
Pay special attention to the radiator grille at the back. If it is loose or deformed during transportation, it will resonate with the frequency of the compressor. It is enough to simply press it with your hand - if the noise disappears, the problem can be easily eliminated by placing a piece of foam rubber or bending the fasteners.
In some cases, the housing itself may rattle if it has a manufacturing defect or damage. Check whether all the decorative elements and the plinth panel below fit tightly.
When you need to call a technician
There are a number of symptoms indicating that independent repair is impossible or dangerous. If you hear a whistling sound similar to the sound of air being released, this may indicate a leak freon through a microcrack. Continued operation will lead to complete release of the refrigerant and overheating of the compressor.
A loud knock, accompanied by a lack of cold, indicates a serious mechanical failure of the compressor. In such a situation, professional diagnostics, evacuation of the system and charging with new refrigerant are required.
A technician is also needed if, after defrosting and eliminating all external causes, the noise does not stop, and the temperature in the chambers no longer corresponds to the set values. The electronics could have detected an error and limited the operation of the unit.
⚠️ Attention: Do not try to solder the tubes or open the sealed circuit yourself. Freon is under pressure, and using the wrong oil or solder can destroy the system in a matter of days.
Why does the Pozis refrigerator hum only at night?
At night, the overall noise level in the apartment decreases, and the operating sounds of the refrigerator become more noticeable. In addition, at night the voltage in the electrical network may stabilize or, conversely, jump, which affects the operation of the motor. If the hum increases sharply, check whether the refrigerator is located close to a wall, which resonates more strongly at night.
Can an old refrigerator be quieter than a new one?
Usually older models are noisier due to wear and tear on parts. However, modern models with inverter compressors can be almost silent. If your old Pozis suddenly goes quiet, the compressor may have stopped working (check for cold), and if it has become noisier, this is a sign of wear.
How long can a refrigerator operate with extraneous noise?
If this is normal operating noise or the rattling of dishes - indefinitely. If the compressor or fan is noisy, the service life is reduced. Working hard without lubrication or out of balance can lead to failure after a few weeks or months. It’s better not to take risks and carry out diagnostics.