Equipment owners often face a situation where the refrigerator Pozis continues to work, but the temperature is the upper compartment ceases to fall to the desired values. Products begin to deteriorate, and condensation appears on the shelves or, conversely, there is no frost where it should be. This is a common problem that can be caused by both trivial operating errors and serious technical malfunctions of the unit.
Two-chamber models of this brand are equipped with reliable cooling systems, however, even a high-quality compressor or working thermostat may not work correctly if operating conditions are violated or parts are worn out. Before calling a technician, it is worth carrying out an initial diagnosis yourself in order to rule out simple causes and not overpay for a specialist visit.
In this article we will analyze in detail all possible failure scenarios, from incorrect installation to refrigerant leaks, and will help you understand where exactly the problem of your refrigerator lies. A competent approach to diagnostics will save time and budget, allowing you to quickly return the equipment to life.
Primary diagnostics and checking settings
The most common reason for the lack of cold in the upper chamber lies not in a breakdown, but in lost settings or incorrect operating modes. If you have recently defrosted your refrigerator or unplugged it, the system may take longer to return to operating mode. It usually takes 2 to 4 hours for the temperature to stabilize, but in hot weather this process may take longer.
Check the position of the temperature regulator. In models with mechanical controls, the slider could move to the “minimum” position, and in electronic ones, the program could go wrong. Make sure that the “Super Freeze” or “Vacation” mode is not activated, if it is provided by your model, as they can change the algorithm of the compressor operation.
⚠️ Attention: If the refrigerator has just been brought from the store or from the cold, you can turn it on no earlier than 4 hours after installing it in a vertical position, otherwise the oil in the compressor will not have time to drain and the device will fail.
It is also worth inspecting the rubber seals on the door of the upper compartment. If they are dirty, damaged, or simply do not fit tightly due to ice or crumbs, the cold will escape and warm air will enter. This causes the unit to work for wear, but does not give the desired effect.
Problems with the defrosting system and ice
If you are the owner refrigerator with a system No Frost or “Crying evaporator”, one of the main reasons for the lack of cold is the freezing of the evaporator. In such models, there is an automatic defrosting system that periodically heats the heating element to melt the formed frost. If this cycle is disrupted, the ice coat blocks the circulation of cold air.
As a result, the upper chamber ceases to receive cooling, since the air supply channels are clogged with ice. In this case, the compressor can work almost non-stop, trying to compensate for the lack of cold, but this has no effect. You may notice that the back wall of the freezer is covered with a thick layer of snow, but the top compartment is warm.
To solve the problem, completely defrosting the unit is often required. Unplug the refrigerator, open the doors and leave it for at least 12-24 hours. This will allow the ice to completely melt and the glass to flow into the drainage system.
Why does the defrost system break down?
Most often, the evaporator heating element, defrost sensor or timer fails. In rare cases, the problem lies in the wiring or control board.
After defrosting, turn on the equipment and monitor its operation. If the situation repeats after a day, it means that one of the elements of the defrosting system is faulty and requires replacement by a qualified technician.
Malfunctions of the thermostat and sensors
The thermostat (or thermostat) is the “brain” that commands the compressor when to turn on and when to stop. In two-chamber refrigerators Pozis often a single thermostat is used that controls the temperature in the upper chamber (or in the evaporator), and in the freezer the cold is maintained by the residual principle or by a separate sensor.
If the thermostat fails and is “stuck” in the “off” position, the compressor simply will not start and the cold will stop being produced. If, on the contrary, it does not open the circuit, the refrigerator will work without stopping, which can lead to freezing of food or, if other components malfunction, to a lack of cold due to icing.
In modern models with electronic control, the role of a mechanical thermostat is performed by air sensors. Their readings may be distorted due to oxidation of the contacts or internal failure of the sensor.
Diagnostics of the thermostat requires testing the contacts with a multimeter. For mechanical devices, you can carry out a test: turn the regulator to minimum, then to maximum - you should hear a click. The absence of a click or response from the compressor indicates a problem.
Freon leak and problems with the compressor
The most unpleasant reason for the lack of cold is a refrigerant (freon) leak or compressor failure. Freon circulates in a closed circuit, and if a microcrack forms in the tubes or radiator, the gas evaporates. Without a sufficient amount of refrigerant, the system cannot transfer heat from the chambers to the outside.
If freon leaks, the compressor may work constantly, trying to gain temperature, but the refrigerant simply does not have time to cool. In some cases, the motor does not start at all if the protection against overheating or low pressure has tripped.
Signs of a leak are often:
- 🔥 Hot side walls or the condenser grille at the back (works for wear).
- 🧊 Lack of cold in both chambers at once or first in one and then in another.
- 🔊 The compressor turns on for a few seconds, clicks and turns off.
- 💨 Visible oily spots on the tubes at the back or inside the freezer (leak point).
⚠️ Attention: You cannot fill the refrigerator with freon yourself! This requires special equipment, evacuation of the system and knowledge of the type of refrigerant. Unprofessional refilling will lead to complete breakdown of the compressor.
Repair in this case is complex and expensive: the technician must find the leak (often a foamed evaporator), eliminate it, replace the filter drier and refill the system.
Clogged capillary tubes
Another technical malfunction, which is less common than a leak, but is also likely, is a clogged capillary tube. Inside the thin copper tube through which freon moves, plugs may form from oxidation products of oil, moisture or debris that entered the system during poor-quality previous repairs.
If clogged, the circulation of the refrigerant is disrupted or completely stopped. The pressure in the system drops and the cold ceases to be produced. The symptoms are very similar to a freon leak: the compressor works, but does not cool, or it turns on and immediately stalls due to overload.
Only a specialist can diagnose a blockage by connecting a pressure gauge manifold. If the pressure at the suction is too low, and at the discharge it is high, and at the same time a characteristic gurgling sound is heard or, conversely, silence, this diagnosis is likely.
Sometimes it helps "pushing" the system, but if the blockage is severe, the circuit must be disassembled and cleaned, which is a labor-intensive procedure.
Table: Comparison of symptoms and probable causes
To make it easier for you to navigate a possible breakdown, we have prepared a summary table. It will help compare the behavior of your refrigerator Pozis with typical malfunctions.
| Symptom | Probable cause | Difficulty of repair | Need a technician |
|---|---|---|---|
| The refrigerator hums, but does not freeze | Freon leak, blockage | High | Mandatory |
| It is warm in the upper chamber, ice in the lower one | Malfunction of the defrost system, clogged channels | Average | Desirable |
| The compressor does not turn on | Failure of the thermostat, start relay | Low/Medium | You can do it yourself |
| Temperature fluctuates, food spoils | Door leakage, sensor failure | Low | Not necessary |
| Strong ice on the back wall | Failure of the defrost cycle, heating element | Average | Desirable |
As can be seen from the table, many problems require professional intervention, especially when it comes to refrigerant. However, you can do simple things like checking the seal or defrosting yourself right now.
When to call a specialist
Despite the desire to save money, there are situations where independent repairs can lead to even greater expenses. If you have checked the settings, defrosted the unit, made sure that the wire and socket are intact, but the refrigerator Pozis still does not freeze the upper chamber, it’s time to call a specialist.
This is especially true if you hear extraneous sounds (metallic knocking, hissing), smell a burning smell, or see that the compressor is hot but there is no cold. Interfering with the freon circulation system without experience and tools is strictly prohibited.
☑️ Checklist before calling a technician
The technician will be able to accurately diagnose the unit: whether it is burnt out motor winding, insulation breakdown or hidden leak in the foamed part of the housing. Repair of refrigerators Pozis is often economically feasible, since spare parts for this brand are available.
⚠️ Attention: When contacting the service, be sure to name the full model of the refrigerator (located on a sticker inside the chamber), since components for different series may differ.
Prevention and proper care
To prevent the problem of “the upper chamber not freezing” from occurring again, it is important to follow the operating rules. Do not put hot food in the refrigerator - this upsets the thermal balance and forces the compressor to work at its limit. Also, do not fill the chamber with food to capacity, leave space for air circulation.
Regularly, at least once every six months, defrost the refrigerator (if not No Frostand wash the drainage hole. The cleanliness of the condenser at the back is also important: if you have cats or there is a lot of dust in the apartment, the radiator may become overgrown with a “fur coat”, which will worsen heat transfer.
Watch the position of the refrigerator: it should stand level, without distortions, so that the doors close themselves under their own weight. Regularly checking the seal for cracks will extend the life of the entire cooling system.
Following these simple recommendations will allow your equipment Pozis to serve for many years without serious breakdowns and costly repairs.
Frequently asked questions (FAQ)
Why does ice freeze in the Pozis refrigerator, but the upper chamber does not freeze?
This is a classic sign of a malfunction of the defrost system. The ice blockage blocks the channels through which cold air should flow from the freezer to the upper compartment. Defrosting and possibly replacing the heating element or sensor are required.
How long should the refrigerator cool down after defrosting?
After turning on the defrosted refrigerator Pozis it usually takes from 2 to 6 hours to reach operating temperature. Do not load food during this time so as not to load the compressor.
Is it possible to use a refrigerator if it hums but does not freeze?
You cannot use it for its intended purpose - the food will spoil. However, leaving it turned on in this state for a long time is also dangerous: the compressor can burn out from overheating while running idle. It is better to turn it off before the technician arrives.
What does it mean if the compressor turns on for 10 seconds and turns off?
Most likely, the thermal protection relay is triggered. Reasons: engine start relay, jammed compressor or lack of freon (the system cannot create pressure). Diagnostics of the electrical part is required.