Optimal temperature conditions are the foundation for the long service life of household appliances and product safety. The owner of a refrigerator Pozis must clearly understand how the thermoregulation system works in order to avoid spoilage of supplies or the formation of ice. Incorrect settings can lead to overload of the compressor, which will significantly reduce the life of an expensive unit.
In this article we will analyze in detail the mechanics of the operation of regulators in various models, from classic two-chamber systems to modern electronically controlled options. You will learn how to interpret the scale readings and what environmental factors influence the choice of mode.
Accurate calibration requires taking into account seasonality and the volume of loaded products. Ignoring basic operating rules often becomes the reason that a technically serviceable refrigerator ceases to cope with its tasks.
The principle of operation of the thermostat using the Pozis technique
The main element responsible for the climate inside the chambers is the thermostat (thermostat). Most models Pozis, especially the Sviyaga i Mirseries, use a mechanical control system. It works on the principle of opening and closing an electrical circuit depending on the temperature of the sensitive element.
When the air inside the chamber heats up above a set value, the contacts close and the compressor starts working. As soon as the lower threshold is reached, the circuit opens and a pause occurs. Thermostat Does not measure temperature in degrees Celsius directly, it responds to the thermal expansion of a special liquid or gas in the capillary tube.
It is important to understand that the digital symbols on the regulator knob are not direct display of degrees. These are conventional divisions of cooling power. Turning the knob to higher values increases the operating time of the compressor, causing the system to cool the internal space more intensively.
In models with No Frost or Low Frost the principle remains similar, but the sensor can be located in the evaporator area, and not directly in the air flow of the chamber. This provides more stable, but less flexible control, depending on the defrosting algorithms.
Deciphering the thermostat scale
Users often mistakenly believe that the number on the handle corresponds to the temperature. In fact, a scale from 1 to 5 (or up to 7 in some modifications) indicates the level of cooling intensity. The minimum value (1) means that the compressor will turn on rarely and work in short cycles.
The maximum value (5 or 7) causes the unit to work almost continuously, trying to achieve extremely low temperatures. If you leave the regulator at maximum in a hot room, the compressor may not turn off at all, which will lead to its overheating and failure.
There is a “golden mean” - usually this position 2.5–3.5. It is in this range that a balance is ensured between energy consumption and food storage quality. In the summer, when the ambient temperature is high, it may be necessary to shift towards higher values, but not to the maximum.
Here is how the positions of the regulator roughly relate to the temperature regime in the main chamber (provided that the seals are in good working order and normal loading):
- 🌡️ Position 1: Temperature about +8...+10°C (saving mode or for storing vegetables that are not afraid of heat).
- 🌡️ Position 3: Temperature about +4...+5°C (standard mode for most products).
- 🌡️ Position 5 (Max): Temperature about 0...+2°C (fast freezing or hot summer mode, requires control).
- ❄️ Position "Off" or "0": The compressor does not work, the light may be on.
Setting the temperature in the refrigerator compartment
To set the correct mode in the refrigerator compartment, you must open the door and locate the thermostat. In classic models Pozis it is often located inside the chamber, on the right wall or under the lampshade. In some cases, the handle may be located outside, on the front panel.
If you have just placed a large amount of room temperature food in the chamber, it makes sense to temporarily increase the cooling power. However, after the processes have stabilized (after 6-8 hours), the regulator should be returned to its normal position. Constant operation at high power leads to overdrying of food and the formation of an ice crust.
⚠️ Attention: Never set the regulator to the maximum value (5 or 7) on a constant basis unless absolutely necessary. This will not make the products “fresher”, but is guaranteed to shorten the life of the motor-compressor and increase electricity bills.
When setting up, take into account the degree of filling of the chamber. An empty refrigerator cools down faster, but it also heats up faster from outside air when the door is opened. A fully loaded refrigerator (heat capacity large amount of food) holds the cold better, but requires more time for initial cooling.
Filling the chamber volume by 60-70% is considered optimal. This ensures the necessary air circulation. If food is placed too tightly, cold air will not be able to wash all the supplies evenly, and the thermostat may incorrectly read the data if it is in a “thermal pocket.”
Adjusting the freezer compartment
In two-compartment refrigerators Pozis with one compressor, the temperature in the freezer is controlled indirectly. The main flow of cold goes exactly there, and only then, according to the residual principle, the refrigeration chamber is cooled. Therefore, by increasing the cooling in the “refrigerator”, you automatically freeze harder in the freezer.
If your model has a separate regulator for the freezer (often found in newer or three-chamber models), its adjustment is made in the same way. However, the priority here is to achieve a temperature of -18°C and below, necessary for long-term storage of meat and fish.
When the “Quick Freezing” mode is turned on (if it is provided by the design and indicated by a snowflake or an asterisk), the compressor runs without stopping. This mode is intended for short-term use (no more than 24-48 hours) when loading fresh products. After freezing, the mode must be turned off manually, otherwise the system may freeze.
In models with a system Low Frost or drip system, it is important to ensure that the products do not block the cold air outlets. A disruption in circulation will cause the temperature sensor to “think” that the chamber is warm and will drive the compressor, while in the far corner everything is already frozen.
☑️ Checking the freezer settings
The influence of external factors on the temperature regime
Refrigerator Pozis, like any climate control technology, is sensitive to environmental conditions. In summer, when the temperature in the kitchen exceeds +25°C, heat exchange in the condenser (black grille at the back) deteriorates. The unit takes more time to lose heat, so to maintain the internal temperature you have to increase the operating power.
In winter, the situation is the opposite. If the refrigerator is in an unheated room or next to a balcony, where the temperature is below +10°C, the compressor may not turn on at all. The oils in the system thicken, and the thermostat “thinks” that it’s already cold. For winter operation, sometimes it is necessary to install a special winter kit or transfer equipment to a warm place.
Direct sunlight falling on the body heats the walls and internal volumes, forcing the thermostat to work in enhanced mode. A similar effect is achieved by installing the refrigerator close to the wall or in a niche without gaps for ventilation.
| Environmental factor | Impact on operation | Recommended action |
|---|---|---|
| High temperature in the room (>28°C) | Compressor overheating, long cycle | Increase power, ventilate the room |
| Low temperature in the room (<10°C) | Failure to turn on, oil freezing | Do not operate without a winter kit |
| Dense loading | Air circulation is difficult | Leave gaps between products |
| Frequent opening of the door | Intake of warm moist air | Reduce power, check the seal |
Diagnostics of temperature problems
If you set the regulator correctly, but the temperature does not hold, it may not be the case in the settings. The first sign of a malfunction is the nature of the compressor operation. If it turns on too often or works without interruption, and there is heat inside, this is an alarm.
A common problem is loss of circuit tightness or leakage refrigerant (of freon). In this case, no matter how much you turn the thermostat knob, there will be no desired cold. The compressor will hum constantly, trying to compensate for the lack of refrigerant, but the efficiency will be zero.
⚠️ Attention: If you smell burning, hear relay clicks, or see that the compressor is hot but there is no cold, immediately unplug the device. Further operation may lead to a fire or complete combustion of the motor.
Another reason is a malfunction of the thermostat itself. Its contacts may “stick” in a closed state, which is why the refrigerator does not turn off, or, conversely, not close, which is why it does not turn on. Replacing a thermostat in Pozis is a procedure accessible to a home handyman, but requires careful handling of electrical equipment.
How to check a thermostat with a multimeter?
To check, you need to remove the thermostat, turn it to the “On” position and ring the contacts. If the device shows a break (one on the screen), the thermostat is faulty and requires replacement. If it shows zero or a value close to it, the chain is intact.
It is also worth checking the integrity of the sealing rubber on the doors. If it cracks or comes off, the cold will go out and warm air will come in. The thermostat will endlessly try to cool the volume, but due to the constant infiltration of heat, this will be impossible.
Seasonal adjustment and maintenance
Changing seasons dictate their operating conditions. In the fall, when the heating is turned on in the apartments, the temperature around the refrigerator rises sharply. During this period, it is worth checking the settings and, perhaps, adding 0.5-1 division on the regulator. In winter, on the contrary, when the batteries work less intensively or ventilation is frequent, the power can be reduced.
Regular defrosting (for drip systems) also affects the temperature regime. A thick layer of ice on the evaporator acts as a heat insulator, preventing cold from penetrating into the chamber. As a result, the thermostat “does not feel” the cold and drives the compressor. Regular defrosting (at least 1-2 times a year) solves this problem.
Do not forget to clean the rear grille of the condenser from dust. A heat exchanger clogged with dust does not transfer heat well, the efficiency of the system drops, and to maintain the temperature the regulator is forced to work at its limit.
Proper care and timely adjustment of settings can extend the life of the refrigerator for many years. Remember that equipment works most efficiently in stable conditions, without sudden voltage surges and temperature changes. Pozis for many years. Remember that equipment works most efficiently in stable conditions, without sudden voltage surges and temperature changes.
Frequently asked questions (FAQ)
Why does ice freeze in the Pozis refrigerator, even if the regulator is set to minimum?
This may indicate a loose door fit, damage seal or malfunction of the defrost system (heating element or timer). Also, the reason may be loading hot products or frequent opening of the door, due to which moisture from the air settles and freezes.
What does a flashing temperature indicator on the display mean (in electronic models)?
Flashing usually indicates an increase in the temperature in the chamber above the permissible norm. This happens when you first turn it on, after defrosting, or when the door is not tightly closed. If the indicator does not stop flashing after the chamber has cooled down, there may be a freon leak or a sensor failure.
Is it possible to operate the Pozis refrigerator on the balcony in winter?
It is strictly not recommended. At temperatures below +5°C, the oil in the compressor thickens, which leads to its breakdown during startup. In addition, the plastic housing and seals may be damaged. For balcony installation, special models with climate class SN-T and a winter set are required.
How to understand that the thermostat is broken?
Main symptoms: the refrigerator does not turn on at all (if the socket and light bulb are working) or works without interruption, severely supercooling the food (turning vegetables into ice), while turning the control knob does not affect the mode in any way compressor operation.