Have you noticed that in the refrigerator Pozis an ice crust or frost forms on the back wall? This is not just an aesthetic problem - a thick layer of ice impairs the performance of equipment, increases energy consumption and can lead to compressor failure. In 80% of cases, the cause can be eliminated on your own without resorting to expensive repairs. But first you need to understand why this happens in your model.
Refrigerators Pozis (especially the series RF, RFA, RK) are equipped with a system drip defrosting (No Frost only in premium models), where the back wall plays a key role in removing moisture. If heat exchange or drainage is disrupted, moisture begins to freeze rather than drain into the pan. In this article, we will analyze all possible causes - from the banal clogged drainage hole to thermostat malfunction, and also provide a checklist for diagnosis and step-by-step instructions for elimination.
Important: if there is ice is formed only in the freezer compartment, the problem may be related to the system Frost Free (in models with No Frost) or the door seal. Here we focus specifically on the back wall of the main chamberwhere food is stored.
1. Clogged drainage hole is the most common cause
In 60% of cases, ice on the back wall of the refrigerator Pozis appears due to a clogged drainage hole. In normal mode, condensate flows down the wall into a special chute, and from there into a pan above the compressor, where it evaporates. If the hole is clogged with crumbs, food particles or mold, the water stagnates and freezes, forming ice.
How to check: Unplug the refrigerator, remove all food and inspect the bottom of the back wall. Under the gutter (usually in the center or left) you will see a small hole with a diameter of 3-5 mm. If it is clogged or water has accumulated nearby, the problem has been found.
- 🔍 Signs of a blockage: puddles under the vegetable drawers, ice only in the lower part of the wall, unpleasant smell from the refrigerator.
- ❄️ What will happen if you don’t clean: ice will spread throughout wall, the compressor will start working without stopping, there is a risk of overheating.
- 🛠️ Tools for cleaning: a cotton swab, a syringe with warm water, wire (∅ 1–2 mm).
Cleaning the drainage takes 10–15 minutes. The main thing is not to use sharp objects (needles, knives) so as not to damage the plastic gutter. If the blockage is deep, you can rinse the system with warm water and citric acid (1 tbsp per 200 ml).
Disconnect the refrigerator from the mains
Remove all products and shelves
Find a drainage hole at the bottom of the back wall
Remove visible debris with a cotton swab
Rinse the hole with a syringe with warm water
Check the water drainage (it should flow freely)
Wipe the wall dry-->
2. Incorrect temperature or operating mode
Refrigerators Pozis are sensitive to temperature settings. If you set the value too low (for example, +2°C instead of the recommended +4…+5°C), the compressor will work longer, and the rear wall will cool more. As a result, moisture from the air and food will condense and freeze.
The other extreme is Super Freeze mode (Super Cool), which some users forget to turn off. In this mode, the fan (if the model has one) drives cold air more intensely, which leads to icing of the walls. Check whether the indicator on the panel Snowflake or S.Cool.
| Cause | Symptoms | Solution |
|---|---|---|
| Temperature is lower +4°C | Ice is evenly distributed over the entire wall, the compressor operates almost without pauses | Set +4…+5°C via the control panel |
| The “Super Freeze” mode is constantly on | The indicator S.Cool is on for more than 6 hours, the wall is covered with frost | Turn off the mode with the button Super Cool (hold for 3 seconds) |
| Frequent opening of the door | Ice only in the upper part of the wall, next to the door | Check the seal and reduce the opening time |
In models Pozis RK-103 i RF-149 the temperature is controlled by a mechanical thermostat (wheel with numbers from 1 to 7). The optimal position is 3–4. If you set 5–7, the wall will freeze. In electronic models (for example, Pozis RK-1401), the temperature is adjusted using buttons +/– in the menu Temp.
Mechanical (wheel)
Electronic (buttons +/–)
I don’t know, I don’t looked
Another option-->
3. Problems with the door seal
A worn or dirty seal allows warm air to enter the chamber. The moisture from it condenses on the back wall (the coldest part of the refrigerator) and freezes. This is especially noticeable in models Pozis s single-chamber system, where the freezer and refrigerator compartment are separated by a thin partition.
How to check the tightness: Close the door, insert between The seal and the body are a sheet of paper (as thick as a bank card). If the sheet is easily pulled out, the seal does not fit. Repeat the test around the entire perimeter. Pay attention to the corners - there the rubber gasket wears out faster.
- 🧽 Cleaning the seal: wipe the rubber with soapy water, remove grease and mold. For disinfection, use hydrogen peroxide (3%).
- 🔧 Repair: If the seal is deformed, it can be restored with a hairdryer (heated to 60°C and shaped) or replaced.
- 💰 Replacement cost: for Pozis the original seal costs 1,200–2,500 ₽ (depending on the model).
In the Pozis RF-140 and RK-139 models, the seal is mounted on self-tapping screws under the decorative panel. To remove it, you need to unscrew the 2 screws at the bottom of the door and carefully slide the panel up.
How to temporarily improve the fit of the seal without replacing it?
If the rubber has lost its elasticity, but is not yet torn, lubricate it with silicone grease (for example, WD-40 Specialist). This will restore flexibility for 2-3 months. Another way is to place a strip of foam rubber (2–3 mm thick) under the seal, but this will reduce the useful volume of the chamber.
4. Malfunction of the thermostat or temperature sensor
If the back wall is covered with ice unevenly (for example, only in one corner) or the refrigerator Pozis works without stopping, the problem may be in thermostat (in mechanical models) or temperature sensor (in electronic). These elements are responsible for turning the compressor on/off. When they break down, they give incorrect signals and the wall becomes overcooled.
Symptoms of thermostat malfunction:
- The compressor turns on for 1-2 minutes and immediately turns off (short cycles).
- The chamber is too cold (0…+2°C), but the display shows normal temperature.
- Ice forms even when the refrigerator is empty.
For diagnosing the thermostat in mechanical models (Pozis RK-101, RF-120) you need:
1. Turn off the refrigerator.
2. Remove the thermostat protective cover (usually located next to the lamp).
3. Ring the contacts with a multimeter in resistance test mode.
- At room temperature, the resistance should be 0 Ohm (contacts are closed).
- If you cool the sensor (for example, put it in the freezer for 10 minutes), the resistance should become ∞ (open).
In electronic models (Pozis RK-1401, RF-1601), the temperature sensor is checked through the service menu. To enter it:
1. Press and hold the button Super Cool 5 seconds.2. A code will appear on the display
F0—this is normal.3. Use the buttons
+/–to find the parametert1(refrigerator temperature).
4. Compare the readings with the actual temperature (measure with a thermometer).
If the difference is greater 3°C, the sensor is faulty.
5. Freon leak or clogged capillary tube
If the back wall freezes unevenly (for example, only on one side) and the refrigerator Pozis cools poorly, it is possible refrigerant leakage (freon) or a blockage in capillary system. This is a serious malfunction that requires the intervention of a technician.
Signs of a freon leak:
- The compressor works non-stop, but the chamber is warm.
- On the back wall there is ice in only one corner (usually where the evaporator passes).
- You can hear gurgling or hissing in the system (with a large leak).
- There are oily stains on the floor under the refrigerator (freon is mixed with oil).
Clogged capillary tube manifests itself in a similar way, but ice forms evenly along the entire wall, and the compressor overheats (you can touch it with your hand - it will be hot). In both cases, you need to call a specialist with equipment for vacuum and filling freon.
⚠️ Attention: Do not try to “top up” yourself Freon! Refrigerators Pozis use refrigerant R-600a (isobutane), which is explosive if mishandled. For repairs, you need a certified specialist with a license to work with freon.
6. Violation of operating rules
Sometimes ice appears on the back wall due to user errors. Here are the most common:
- 🥬 Storing hot foods: if you put pots of soup or freshly cooked dishes in the refrigerator, the moisture evaporates and settles on the walls. In models Pozis with a drip system, this leads to icing.
- 🚪 Frequent opening of the door: every time you open the refrigerator, warm air gets inside. If this happens frequently (for example, during cooking), the compressor does not have time to remove moisture.
- 🧊 Incorrect loading of products: if food is placed close to the back wall, it blocks air circulation. As a result, the wall becomes supercooled and moisture freezes.
- 🌡️ High room temperature: if the refrigerator is located next to a stove or radiator, it works in increased mode, which leads to icing.
Recommendations for use:
- Cool foods to room temperature before placing them in the refrigerator.
- Do not open the door for more than 10-15 seconds.
- Place foods so that there is a gap of 3-5 between them and the back wall see
- Install the refrigerator away from heat sources (at least 50 cm from the stove, 30 cm from the battery).
7. Fan failure (in models with No Frost)
Refrigerators Pozis with a system No Frost (for example, RFN-160, RKNF-180) are equipped with a fan that distributes cold air throughout the chamber. If it breaks, cold will accumulate near the evaporator (rear wall), and moisture will freeze.
Signs of a fan malfunction:
- The refrigerator compartment is warm, but the freezer is too cold.
- A hum or grinding noise is heard during operation (the fan bearing is worn out).
- Ice forms on only in the upper part the rear wall (the evaporator is located there).
To check the fan:
1. Unplug the refrigerator.
2. Remove the back panel in the freezer (usually secured with latches or screws).
3. Turn the fan blades by hand - they should rotate easily, without jamming.
4. Connect the refrigerator and listen: if the fan does not make noise after 10–15 minutes of operation, it is faulty.
The cost of replacing a fan for Pozis is 1,500–2,500 ₽ (depending on the model). If the problem is in the bearing, you can try to lubricate it with silicone grease, but this is a temporary solution.
⚠️ Attention: In refrigerators with No Frost you cannot chip the ice with a knife or other sharp objects! This can damage the evaporator and lead to a freon leak. To defrost, use only warm water or a hair dryer (at minimum power).
FAQ: Frequently asked questions about freezing of the back wall in Pozis
Can I use the refrigerator if there is ice on the back wall?
Yes, but it is undesirable for a long time. Ice impairs heat transfer, causing the compressor to wear out and energy consumption to increase by 20–30%. If the ice layer is thicker than 5 mm, it is better to eliminate the cause.
How long does it take to defrost a Pozis refrigerator?
At room temperature - 6–8 hours. You can speed up the process by placing a bowl of hot water (not boiling water!) in the chamber or by using a fan. Do not use a hair dryer at maximum power - this can damage the plastic.
Why does ice appear again after defrosting?
This means that the cause has not been eliminated. The most common culprit is a clogged drain or a faulty thermostat. Also check the seal and temperature settings.
Is it possible to replace the thermostat in Pozis yourself?
Yes, if you have experience working with electrical appliances. The thermostat is attached with 2-3 screws, and the wires are connected through terminals. The main thing is not to confuse the polarity. For models RK-103 and RF-149 a thermostat is suitable K59-L1438 (analogue of the original).
What temperature should be in the Pozis refrigerator?
Optimal values:
- Refrigerator compartment: +4…+5°C
- Freezer compartment: –18°C
In models with a freshness zone (Fresh Zone), the temperature should be 0…+1°C.