The situation when your Pozis refrigerator stops freezing always takes you by surprise. It may be light in the chamber, the indicators are on, but the food begins to deteriorate, and the temperature rapidly rises to room temperature. This is a classic symptom of a malfunctioning refrigeration circuit or control system. Most often, owners are faced with the fact that the freezer is working normally, and the main compartment is warm, or the cold disappears completely in all zones.
Before panicking and calling a technician, it is necessary to carry out an initial diagnosis. Pozis refrigerators, like any other equipment, they have their weak points and typical faults. Understanding the principle of operation of the unit will help you save time and money by determining whether you can solve the problem yourself or whether professional intervention using special equipment is required.
In this article we will analyze in detail all the possible reasons for the lack of cold. We will consider both simple operating errors that are easy to fix, and complex technical breakdowns that require replacement of components. A complete loss of cold in a two-chamber refrigerator most often indicates a refrigerant leak or a compressor malfunction. Let's look at each case in detail so that you can accurately determine the cause.
Operating errors and simple reasons
Sometimes the problem lies not in the breakdown of parts, but in the incorrect use of equipment. If you recently defrosted the unit, rearranged it, or simply kept the door open for a long time, the compressor may not have had time to reach operating mode. Temperature mode It does not recover instantly, especially after a long defrost.
Check whether the door fits tightly to the body. If the sealing rubber is dirty or deformed, warm air enters the chamber. The compressor works hard, trying to cool the volume, but cannot cope with the constant flow of heat. As a result, it may be cool inside, but not at a sufficient level for freezing.
It is also worth paying attention to the loading of the chambers. If you put a large amount of warm food in the refrigerator, the system will take up to 24 hours to stabilize the temperature. During this period, it may seem that the equipment is not freezing, although it is simply working in intensive loading mode.
- 🧊 Let the refrigerator stand empty for 5-7 hours after defrosting.
- 🚪 Check the cleanliness and tightness of the magnetic seal around the entire perimeter.
- 🥘 Do not load into the chamber hot or warm dishes, cool them to room temperature.
⚠️ Attention: If you transported the refrigerator lying down, you can turn it on no earlier than 4-8 hours later. The oil needs time to drain into the compressor crankcase, otherwise water hammer and engine jamming are possible.
Failures of the thermostat and sensors
One of the most common reasons why Pozis refrigerator it does not freeze is the failure of the thermostat (thermostat) or electronic sensor temperature. This element is responsible for turning the compressor on and off depending on the temperature inside the chamber. If it is “stuck” in the “off” position, the motor simply will not start.
In mechanical models, the thermostat has a long capillary tube, which is filled with freon gas. If this tube is damaged or the bellows loses its tightness, the pressure inside does not change and the contacts do not close. In modern models with a system No Frost or electronic control, this function is performed by thermistors (sensors) that transmit signals to the control module.
You can diagnose a malfunction of a mechanical thermostat by closing its contacts directly. If after this procedure the compressor starts working and it gets cold, then the temperature regulator needs to be replaced. With electronic sensors it is more difficult - you need to test the resistance with a multimeter at different temperatures.
- 🔧 When replacing the thermostat, it is important not to bend or damage the sensitive capillary tube.
- 🌡️ Temperature sensors in the No Frost system are often located in the plastic housing of the evaporator and require careful removal.
- 🔌 Before any electrical work, be sure to disconnect the appliance from the network to avoid electric shock.
Symptoms of thermostat failure are often confused with other malfunctions. The refrigerator may run non-stop but not freeze if the sensor reads the temperature incorrectly and does not give a command to stop, but the circuit itself may be faulty. However, most often when the thermostat breaks down, the compressor is either silent or hums continuously.
Problems with the start relay and compressor
The heart of the refrigerator is compressor. If it doesn't start, there won't be any cold anywhere. Often the problem lies not in the motor itself, but in the start-up relay. This device provides an impulse to start the engine and protects it from overloads. In Pozis refrigerators relays often fail due to voltage surges or natural wear.
How to understand that the problem is in the relay or compressor? If you hear a soft click, a hum that lasts 3-5 seconds, followed by another click and silence, this is a classic sign that the engine is trying to start but can't. The relay is activated for overload protection. In this case, there is a high probability that the relay needs to be replaced, but it may also be that the compressor itself is jammed.
☑️ Compressor diagnostics
If the compressor is hot, hums, but does not start even with a new relay, most likely there is a winding break or mechanical jamming of the piston group. In this case, the compressor needs to be replaced, which is a complex and expensive procedure that requires evacuation of the system and charging with freon.
| Symptom | Probable cause | Required actions |
|---|---|---|
| Silence, no buzzing | Thermostat malfunction or open circuit | Checking contacts and replacing the thermostat |
| Humming for 5 seconds, clicking, silence | Faulty start relay or compressor | Replacement relay, motor diagnostics |
| The compressor runs constantly | Freon leak or clogged capillary | Searching for leaks, vacuuming, refilling |
| Strong vibration and noise | Unbalance or wear of the suspension | Checking mounting bolts and shock absorbers |
⚠️ Attention: Do not try to repair a sealed compressor yourself. Opening the case will allow moisture and oxygen to get inside, which will permanently damage the unit. Replacement with a new one is required.
Refrigerant leak and system blockage
If the compressor runs continuously, hums, is hot to the touch, but there is no cold in the chambers (or it is very weak), most likely it has occurred freon leak. The refrigerant circulates in a closed circuit, and if a microcrack has formed somewhere (often in the foamed part of the housing or in the evaporator), the gas gradually comes out.
Another common problem is clogged capillary tube. An ice plug (due to moisture) or clogging with oil oxidation products could have formed in the system. In this case, there is freon, the pressure is high, but circulation is impossible. The compressor hums, trying to push gas, but to no avail.
It is difficult to visually determine a leak. Sometimes you may notice an oily spot where the gas comes out, as freon circulates along with the oil. However, in modern models with a foamed evaporator, the leak site is often hidden by polyurethane foam. To search, use leak detectors or the nitrogen pressure method with immersion in water (for removed components).
Is it possible to fill the refrigerator yourself?
Theoretically, it is possible if you have the equipment (vacuum pump, pressure gauge station, scales). However, without finding and eliminating the cause of the leak, refilling will only provide a temporary effect for several weeks or months. In addition, different brands of freon require different oils, and an error in the choice will lead to breakdown of the compressor.
- 💨 To find a leak, the technician pumps the system with nitrogen under pressure of up to 10-15 atmospheres.
- 🧊 If the capillary is clogged, the system often requires purging and replacement filter-drier.
- 🛠️ Repair of the circulation system always ends with vacuuming and precise filling by weight.
It is worth noting that if the leak occurs in the foam part (inside the housing wall), repairs may not be economically feasible. In such cases, technicians often suggest installing an external evaporator (“crying” or a circuit on the back wall), which solves the circulation problem, but changes the appearance of the chamber.
Problems in the No Frost system
In models Pozis with the No Frost system, the lack of cold when the compressor is running is often associated with a violation of the defrost cycle evaporator. If the defrost heating element, timer or defrost sensor is faulty, a “coat” of ice will build up on the evaporator. This ice blocks the air channels, and cold air simply does not enter the main chamber.
The user may notice that the refrigerator is humming, but it is warm inside, and a layer of ice or frost is visible on the back wall of the freezer. In some cases, ice completely blocks the fan and it stops moving air. The system thinks that it needs to be frozen and works without stopping, but there is no effect.
For diagnostics, you need to defrost the refrigerator completely (at least 24 hours with the doors open). If after defrosting it worked normally for several days, and then stopped freezing again, the problem is definitely in the defrosting system. You need to check the circuit: Evaporator heating element -> Defrost sensor -> Timer or control module.
- ❄️ Ice build-up on the back wall of the freezer is the first sign of problems with defrost.
- 🌀 If the fan does not spin, check whether it is blocked by ice or a foreign object.
- ⏱️ The defrost timer in older models is a mechanical part that often requires replacement when cycles fail.
⚠️ Attention: When checking To defrost the heating element with a multimeter, its resistance should be within normal limits (usually 200-400 Ohms). If the device shows a break (infinity), the heating element has burned out and requires replacement.
The influence of the external environment and the power supply
Do not discount external factors. Unstable voltage in the network can lead to the compressor not starting or working intermittently. If the voltage drops below 190-200 Volts, the starting relay may not work correctly, and the motor will hum, but will not start.
The ambient temperature in the room is also important. If the refrigerator is located in an unheated country house or balcony, where the temperature drops below +5°C (or above +32°C), the thermostat may not turn on the compressor (in winter) or the system will not have time to remove heat (in summer). Refrigerators Pozis are designed to work in a certain climate class indicated on the nameplate.
Check the outlet and wiring. Sometimes the problem is trivial: oxidized contacts in the socket create a voltage drop, which is not enough to reliably start the engine. Try plugging the appliance into another outlet using a grounded extension cord to check.
Is it possible to repair a Pozis refrigerator yourself?
Simple operations, such as replacing a thermostat, start relay or defrost sensor, are accessible to a home handyman with basic skills and a multimeter. However, work related to a sealed circuit (compressor replacement, leak detection, freon refilling) requires special equipment and a license. Without a vacuum pump and pressure gauges, high-quality repairs are impossible.
Why does the refrigerator freeze only in the freezer?
This is a typical symptom for two-chamber refrigerators with one compressor. Most often, the reason is a freon leak (it is left only for the first circuit - the freezer) or a clogged capillary tube. It is also possible that the air supply channel to the main compartment may freeze (for the No Frost system) or the damper may be faulty.
How much does the repair cost if Pozis does not freeze?
The cost depends on the breakdown. Replacing a thermostat or relay is inexpensive. Repairing the circulation system (leakage, refilling) or replacing the compressor costs much more, sometimes amounting to 50-70% of the cost of a new refrigerator. Only a technician can tell you the exact amount after on-site diagnosis.
Where can I find an electrical diagram for a Pozis refrigerator?
Electrical diagrams are often located on the back wall of the refrigerator under a plastic cover or in the operating instructions. They can also be found on the Internet for a specific model by entering the full index (for example, Pozis RK-139) indicated on the nameplate inside the camera.