Refrigeration equipment of the brand Pozis, produced in Russia, is deservedly popular due to its reliability and adaptability to domestic power grids. However, in order for the equipment to work efficiently and not spoil the products, owners need to know how to correctly set the temperature. Incorrect adjustment can lead to rapid spoilage of products or, conversely, to their freezing, as well as to an increase in energy consumption.
In this article we will analyze in detail the mechanics of the operation of thermostats installed in different models of refrigerators Pozis, from classic mechanical to modern electronic systems. You will learn where thermostatis located, how to decipher the values on the scale and what parameters are optimal for various storage chambers. Understanding these nuances will help extend the life of the compressor and maintain the freshness of your products.
Before taking active steps, it is important to determine the type of control in your model. Most household models are equipped with a mechanical regulator, which is a round disk with marks, while more expensive series may have an electronic display. Regardless of the type, the principle of maintaining cold remains the same, but the setting methods differ significantly.
Determining the type of temperature control
The first step to proper setting is identifying the control system. Classic models, such as Pozis RK-139 or RK-168, use mechanical thermostat. It is usually located inside the refrigerator compartment, often in the upper right corner or above the door. On the body of such a regulator there are numbers from 1 to 5 (or from Min to Max), which indicate not degrees Celsius, but the cooling intensity.
If you own a modern model with a system No Frost or electronic control, the process looks different. Here the temperature is set in degrees Celsius through a panel on the outside of the door. Such systems allow more precise control of the climate inside the chambers and often have separate settings for the refrigerator and freezer compartments.
⚠️ Attention: In electronically controlled models, any changes do not take effect instantly. The compressor may take 15 to 30 minutes to stabilize after changing settings. Do not try to change the settings again and again during this time.
It is important not to confuse the temperature control with the quick freeze button, if there is one. This function, often indicated by a snowflake or text Super Freezeforces the compressor to operate at maximum power. It should be used only when loading a large volume of fresh products, but not for constant work.
Setting a mechanical thermostat
Adjusting the temperature in models with mechanical control is an intuitive process, but requires knowledge of one important detail: the numbers on the scale do not correspond to degrees. One represents the minimum cooling output (heat), and the maximum value (usually 5 or 7) represents the maximum output (cold). The standard operating mode is considered to be position of the regulator at mark 2 or 3.
To change the operating mode, you must turn the regulator knob in the desired direction. If you notice that the food in the refrigerator compartment begins to freeze at the back wall, you should reduce the power by turning the knob towards lower values. Conversely, if the food spoils faster than usual, and it is too warm inside, the knob is turned towards increasing numbers.
It is worth considering that the mechanical thermostat responds to the temperature of the evaporator, and not to the temperature of the air in the chamber. This means that when the setting is changed, the actual temperature inside will not change immediately, but after some time required for the compressor cycle. Typically, stabilization takes about 2–3 hours.
In some older models, the regulator may be hidden behind a decorative panel or located in an inconvenient location. In such cases, access may require removing the shelf or carefully pushing back the plastic stops. The main thing is not to use excessive force so as not to break the plastic fasteners.
Electronic control and precise values
Owners of refrigerators Pozis with electronic control are more fortunate in terms of accuracy. Here you operate in specific degrees Celsius. The recommended temperature for the refrigerator compartment is +2°C to +5°C, and for the freezer - -18°C or lower. The control panel is usually locked from accidental pressing, so to begin setup, you often need to press and hold the Lock button for 3-5 seconds.
The setup process is carried out by pressing the Up and Down arrow buttons or the + and - symbols. The numbers on the display begin to flash, indicating that the system is ready to accept new commands. After selecting the desired value, you need to confirm the action or simply wait a few seconds until the system automatically saves the parameter.
| Storage area | Recommended temperature | Acceptable range | What to store |
|---|---|---|---|
| Upper shelf | +3...+5°C | +2...+6°C | Ready meals, drinks |
| Middle shelf | +2...+4°C | +1...+5°C | Dairy products, eggs |
| Lower shelf (freshness zone) | 0...+2°C | -1...+3°C | Raw meat, fish |
| Freezer | -18°C | -16...-24°C | Frozen food |
Electronic systems are often equipped with alarm indicators. If the temperature inside the chamber deviates from the set parameters by more than a few degrees, a red indicator lights up or an audible signal sounds. This may indicate that the door is not tightly closed, the chamber is overloaded with warm products, or the system is malfunctioning.
Why is the temperature indicator blinking?
The indicator can blink in two cases: either the temperature inside the chamber has not yet reached the set value (for example, immediately after turning on or defrosting), or a system malfunction has occurred. If the blinking stops after a few hours, this is normal. If it lights up constantly, check the seals and settings.
Optimal modes for different seasons
The ambient temperature has a direct impact on the operation of the refrigerator. In the summer, when the apartment is hot, the compressor has to work harder to maintain the cold inside. In winter the situation changes. Understanding seasonal characteristics helps to adjust Pozis refrigerator so that it does not run idle and does not overheat.
In the summer, especially if the room temperature exceeds +25°C, it is recommended to set the mechanical regulator to medium values (3 or 4), but make sure that there is no food near the back wall were freezing. In electronic models, you can safely keep the standard +3°C or +4°C. If the refrigerator is in the kitchen where you cook, and the temperature there often rises, it may make sense to increase the cooling a little.
In winter, when the room is cool (about +17...+19°C), it is better to set the mechanical regulator to weaker mode (1 or 2). This will prevent excessive load on the compressor. However, here lies an important nuance for single-compressor models: if the room is too cold, the refrigerator may simply stop turning on, since the thermostat will not give the command to start.
⚠️ Attention: It is not recommended to install the refrigerator next to heating appliances, a stove, or in direct sunlight. This disrupts heat transfer and causes the compressor to wear out, regardless of the thermostat settings.
It is also worth considering the frequency of door opening. In a large family where the refrigerator is opened dozens of times a day, it makes sense to keep the temperature slightly below average to compensate for the constant flow of warm air. In single households or offices, you can set the energy saving mode.
Checking and calibrating temperature
Even if you set the correct numbers on the regulator, this does not guarantee that the temperature inside is really that high. Mechanical thermostats can go wrong over time due to wear or miscalibration. To be sure of the safety of food, it is recommended to periodically check using an external thermometer.
To take measurements, place a regular household thermometer (or a special one for refrigerators) in a glass of water and place it on the middle shelf of the refrigerator. The door must be tightly closed. Leave the thermometer for at least 6-8 hours without opening the refrigerator during this time. Only after this can you take readings.
☑️ Checking the temperature
If the thermometer readings differ significantly from the ones you set (the difference is more than 2 degrees), it is necessary to re-adjust. In mechanical models, this is done by trial and error: if the temperature is higher than normal, we add power, if it is lower, we reduce it. After each adjustment, the measurement procedure must be repeated again.
It is worth noting that the temperature may differ in different zones of the refrigerator. It is always colder at the back wall, where the evaporator is located. On the contrary, door shelves are warmer due to contact with the air of the room when opening. Therefore, use the maximum cold zone to store perishable products (meat, fish), and door compartments for sauces and drinks.
Typical problems with adjustment
Sometimes users encounter situations where adjusting the temperature does not give the expected effect. Food may freeze even at minimum power, or the refrigerator stops freezing at maximum. Often the reason lies not in the regulator itself, but in accompanying factors that are easy to overlook.
One of the common problems is loose sealing rubber on the door. If warm air enters the chamber, the compressor will work continuously, trying to compensate for heat loss, but will not reach the desired temperature. In this case, no amount of twisting of the regulator will help - the seal needs to be replaced or the hinges adjusted.
Another common mistake is installing hot or warm products. If you put a pot of freshly cooked soup in the refrigerator, the local heating will cause the thermostat (especially if it is located nearby) to think that the entire compartment is hot. The compressor will go into maximum load mode, which can lead to freezing of other products.
⚠️ Attention: If, when turning the mechanical regulator, you hear a crackling sound or feel that the handle is scrolling without resistance, the axis or the thermostat itself may be broken. In this case, it is necessary to replace the part; further operation in this mode is dangerous.
It is also worth checking the condition of the evaporator. If it is covered with a thick “coat” of ice (in models without No Frost), heat transfer is impaired. Ice acts as a heat insulator, preventing cold from spreading throughout the chamber. In this case, you need to defrost the refrigerator completely by unplugging it from the network for 10–12 hours, and only after that adjust the temperature again.
The influence of loading and location products
Correct temperature control is only half the success. The other half depends on how you place the products inside. Cold air in the refrigerator Pozis circulates naturally (or is forced into No Frost), and if this flow is blocked, the cold zones will not work effectively.
Do not overcrowd the refrigerator. There should be a gap between the products for air circulation. If the chamber is clogged to capacity, the cold will not be able to be distributed evenly, and the thermostat will receive distorted temperature data, which will lead to improper operation of the compressor.
Pay special attention to the area near the rear wall. In most models, this is where cooling occurs. If you press food close to the back wall, they may freeze to it, even if the control is set to minimum. Leave a small gap of 2-3 centimeters from the back panel.
Maintenance and long-term adjustment
For the thermal control system to work properly for years, it requires minimal but regular maintenance. Dust on the condenser (the grill at the back of the refrigerator) impairs heat transfer, causing the compressor to work longer and harder. This can throw off the temperature even if the settings have not been changed.
Every six months, it is recommended to carry out preventive defrosting (for drip systems) and cleaning the drainage hole. A clogged drain causes increased humidity and excess ice, which also affects the thermostat's accuracy. A clean refrigerator responds to settings faster and more accurately.
If you notice that the refrigerator has started to work differently than before (turns on more often, keeps the cold worse), do not rush to change the settings. First, carry out a complete inspection: check the seals, defrost the chamber, clean the rear grille. Only after this does it make sense to recalibrate the thermostat.
Why does ice freeze in the Pozis refrigerator, even if the regulator is at minimum?
Ice formation at the minimum setting of the thermostat most often does not indicate a setting error, but a malfunction. Possible reasons: the door does not close tightly (moist air enters), the drainage hole is clogged (water does not drain and freezes), the defrost sensor is faulty (in No Frost) or the thermostat itself is faulty (contacts are stuck). Ice can also build up if open containers with hot liquid are placed in the chamber.
Is it possible to set the temperature below -24°C in a Pozis freezer?
Technically, most household compressors and control systems in Pozis refrigerators are not designed to constantly operate at temperatures below -24°C...-26°C. Setting such extreme values will lead to continuous operation of the compressor, overheating and rapid failure. The standard deep-freezing mode is -18°C, which is enough for long-term storage of any products.
How to understand that the thermostat is faulty?
Signs of a malfunctioning thermostat: the refrigerator does not turn on at all (even when the knob is turned to maximum), the refrigerator works non-stop and freezes all products very much (even at minimum), a click is heard, but it does not start compressor does not occur. In such cases, diagnostics are required and, most likely, replacement of the part.
Do you need to change the temperature settings during a power outage?
There is no need to specifically change the settings during a planned or emergency power outage. After turning on the power, the refrigerator will start working according to the last saved settings. However, if the shutdown was long and the food was defrosted, after turning it on, you can temporarily activate the “Super Freeze” mode (if available) or turn the mechanical regulator to maximum for 2-3 hours in order to quickly gain cold, and then return to normal mode.
Does the amount of food in the refrigerator affect the temperature setting?
Yes, it does indirectly. An empty refrigerator cools down faster, but it also loses cold faster when the door is opened. A loaded refrigerator (especially with products with a high water content) works like a cold accumulator: it holds the temperature longer, but also cools down longer upon initial startup. If you have completely emptied the refrigerator, you can reduce the power a little (set the regulator to a lower number), since it is easier to cool the empty volume.