The situation when the temperature in the refrigerator compartment Pozis falls below optimal values occurs quite often. Instead of fresh vegetables and milk, you find ice crystals on your produce and your greens turn to mush. This is a signal that cooling mode is broken and requires immediate intervention.
Equipment owners are often faced with the fact that even at the minimum settings of the regulator, the cold continues to increase. Before calling a technician or writing off the unit, it is necessary to carry out diagnostics of the control system. In most cases, the problem is solved by correct calibration or elimination of simple faults that can be corrected independently.
A decrease in temperature can be caused by both operational errors and technical failures. Understanding the principles of your Pozis operation will help you quickly return to comfortable storage conditions. Next, we will look at the basic adjustment methods, from simple actions to more complex electronic settings.
Optimal temperature conditions for different cameras
First, it is important to determine what indicators are normal. In the refrigerator compartment, the ideal temperature is considered to be in the range from +2 to +5 degrees Celsius. If the thermometer shows values below zero, the food begins to freeze, losing its taste and healthy structure.
In the freezer compartment the situation is different. Here temperature mode should be maintained at -18 degrees and below. However, if you set the “Super Freeze” mode and forget to turn it off, the compressor will work continuously, which can lead to excessive cooling even in the main chamber, especially in models with one compressor.
⚠️ Attention: Long-term storage of food at temperatures below 0°C in the refrigerator compartment leads to the destruction of the cellular structure of vegetables and fruits. After defrosting, they will lose juice and become unsuitable for fresh consumption.
Modern models Pozis are often equipped with a freshness zone, where the temperature is kept around 0 degrees. It is important not to confuse this zone with the main volume of the chamber. If food freezes throughout the entire volume, it means thermoregulation system it is not working correctly or the calibration of the sensors has gone wrong.
- 🌡️ Main volume of the refrigeration chamber: +2...+5°C
- ❄️ Freezer: -18°C and below
- 🥩 Freshness zone (zero zone): 0...+2°C
- 🍺 Door shelves: +5...+8°C (warmest zone)
Adjusting the mechanical thermostat
In classic models of refrigerators Pozis, such as series RD or Sviyaga, the cold is controlled using a mechanical thermostat. This device is a handle with a digital or color designation, located inside the camera or on the body.
The principle of operation is simple: turning the handle changes the moment the contacts open. The higher the number on the scale, the lower temperature there is inside the chamber. If your food freezes, you need to turn the regulator to lower values. Typically the scale goes from 1 (minimum cold) to 5 or 7 (maximum cold).
Sometimes users make the mistake of turning the knob to maximum in the hope of cooling food faster, and then forget to turn it back. As a result, the compressor runs without stopping. To normalize the situation, turn the knob to position 2 or 3 and wait a few hours.
It is worth noting that mechanical thermostats can “float” over time. This means that the mark on the handle no longer corresponds to the actual temperature inside. In this case, only an external thermometer will help, according to the readings of which you will select the desired position of the handle experimentally.
Setting up electronic control and display
More modern models Pozis, for example, series Smart or Mirage, are equipped electronic control panel. Here, the setting is made by pressing buttons on the display located on the outside of the door or inside the chamber.
To reduce the temperature in the refrigerator compartment, you need to find a button with the designation Temp or a snowflake icon for the refrigerator compartment. By clicking on it, you change the value on the display. Make sure that you are adjusting the the refrigerator, and not the freezer, as the buttons are often located next to each other.
In some models, the “Vacation” or “Eco” function is available. Activating these modes automatically increases the temperature in the refrigerator compartment to +10...+15 degrees to save energy, which can be useful if you are leaving, but is not at all suitable for storing perishable food in the usual way. Check whether this mode is accidentally activated.
| Pozis model | Control type | Setting range (CC) | Features |
|---|---|---|---|
| Pozis RK-139 | Mechanical | 1-7 (conditionally) | Handle inside the chamber |
| Pozis RK-168 | Electronic | +2...+10°C | Display on the door |
| Pozis Fridge-505 | Mechanical | Min-Max | Hidden thermostat |
| Pozis Smart | Electronic | +2...+8°C | Touch control |
If the display shows an error or flashes, there may be a failure in the electronic module. Try doing rebooting the system. To do this, unplug the refrigerator for 10-15 minutes and then turn it on again. Often this resets temporary errors in the controller logic.
Adjusting the damper in the No Frost system
In refrigerators with the system No Frost cold is generated in the freezer compartment and supplied to the refrigeration compartment through a special channel. The amount of supplied air is regulated by the air damper (damper). If the refrigerator compartment is too cold, it is possible that the damper does not close completely or its settings are lost.
In some models Pozis with electronics, you can enter the service menu and calibrate the damper. However, most often the problem lies in mechanical jamming or freezing of the mechanism. Ice can block the flap, preventing it from blocking the flow of cold air.
How to check the operation of the damper?
To check, remove the plastic trim on the back wall of the refrigerator compartment (where the holes come out). When the compressor is running, you should feel a flow of cold air. If the air blows constantly and very strongly, even when the compressor should be turned off due to temperature, then the damper is stuck in the open position.
To eliminate the problem, it is often necessary to completely defrost the unit during the day. This will allow the ice inside the channels and damper mechanisms to melt. After defrosting, turn on the refrigerator and check whether the temperature has leveled out.
- ❄️ Freezing of the air supply channel
- 🚫 Mechanical jamming of the sash
- 🔌 Malfunction of the damper drive
- 🌬️ The filter or channel is clogged with debris
⚠️ Attention: When trying to free the damper from ice, it is strictly forbidden to use sharp objects or hot water. Mechanical damage to the plastic flap or heating of the plastic will lead to the need to replace the entire assembly.
The influence of the location of products and loading
Excessive loading of the refrigerator can also cause local hypothermia. If you tightly fill the chamber with products close to the back wall, you are blocking the natural air circulation. Cold air accumulates at the rear wall and does not have time to mix with warm air, creating zones with temperatures below zero.
It is especially critical to place products at the rear wall in models with a weeping evaporator. Here the temperature directly at the wall can drop to -5...-10 degrees while the compressor is operating. If lettuce or milk touches the wall, it will freeze, even if the thermostat is set correctly.
Follow the headspace rule. There should be a gap of at least 2-3 centimeters between the products and the back wall. This will ensure proper operation thermal sensor and uniform distribution of cold throughout the entire volume of the chamber.
☑️ Rules for loading the refrigerator
Also pay attention to the location of heat-sensitive products. It is better to place dairy products and open containers with liquid on the middle shelves, away from the cold air outlet area. Door shelves are the warmest place, but they are subject to temperature changes when opening the door.
Checking seals and tightness
It would seem that leaks should lead to an increase in temperature, as heat enters inside. However, in reality the situation may be the opposite. If the sealing gum Pozis does not fit tightly, warm, moist air constantly gets inside.
Moisture from the air condenses on the evaporator and turns into a “coat” of ice. A thick layer of ice on the evaporator impairs heat transfer. The temperature sensor, seeing that the cold is not gaining, gives the command to the compressor to work longer and more intensely. As a result, the evaporator freezes, and excess cold begins to enter the chamber with each defrost cycle or fan operation.
Check the condition sealing collar along the entire perimeter of the door. It should be clean, elastic and fit snugly to the body. If the rubber is dull, cracked or has dents, it must be replaced. You can temporarily try to warm the deformed areas with a hairdryer (carefully!) or apply a tourniquet to straighten the rubber.
When specialist intervention is required
There are situations when self-adjustment does not help, and the problem lies in a component malfunction. If you have set the minimum temperature, checked the load and defrosted the unit, but the food still freezes, the thermostat or temperature sensor.
In mechanical models, the thermostat may “stick” in position “on” without opening the circuit even when low temperatures are reached. On electronic models, the sensor may transmit incorrect data to the control module. Replacing these elements requires disassembling the case and having tools.
A freon (refrigerant) leak may also be the cause. If there is a shortage of freon, the compressor works constantly, trying to increase the temperature, but the cooling efficiency drops unevenly. Ice may form at some points of the evaporator, which is then blown into the chamber by a fan.
- 🛠️ Replacement of a faulty thermostat
- 🔌 Repair of the electronic control module
- 💨 Refilling with refrigerant in the event of a leak
- 🧊 Removing capillary tube blockage
If you do not have the skills to work with electrical appliances and refrigerants, it is better to contact an authorized service center. An attempt to independently repair complex electronics or the freon circulation system can lead to permanent failure of the equipment.
Why does the temperature drop again after a few days after defrosting?
This may indicate a problem with the defrosting system. If the defrost heating element or timer does not work, a coat of ice will again build up on the evaporator. It blocks the channels, and the refrigerator begins to work with overload, causing temperature fluctuations. Diagnostics of the No Frost system is required.
Is it possible to adjust the temperature in winter if the refrigerator is on the balcony?
Most refrigerators Pozis are designed to operate in climate class SN-N (from +10 to +32 degrees). At an ambient temperature below +10 degrees, the oil in the compressor thickens, and the thermostat may not turn on the compressor (the refrigerator compartment will be warm) or, conversely, may not work correctly. Operation in cold weather is prohibited.
Does installing a refrigerator next to the battery affect the temperature inside?
Yes, it does significantly. If the refrigerator is located close to a heat source, the compressor is forced to work almost non-stop to compensate for the heat. This leads to wear and tear of the equipment and can cause failures in maintaining the set temperature, including its instability.
What to do if the thermostat knob rotates endlessly?
If the knob of a mechanical thermostat rotates in a circle without characteristic clicks or stops, this is a sign of a breakdown of the thermostat itself. The internal mechanism is destroyed. In this case, temperature adjustment is impossible, the part must be replaced with a new one.