Refrigeration equipment of the brand Pozis is deservedly popular due to its reliability and affordable cost, however, many owners encounter difficulties in initially setting the climate inside the chambers. Proper temperature control is not just a matter of comfort, but a necessary condition for long-term storage of food and preventing spoilage. Errors in setting can lead to freezing of vegetables or, conversely, to rapid souring of dairy products.
Modern models, such as the series Paradise freshness or classic two-chamber units, are equipped with different control systems, from mechanical rotary controls to electronic panels with a digital display. Understanding the operating principle of your specific device will allow you to avoid unnecessary calls to the technician and save energy. In this article we will analyze in detail all the nuances of settings characteristic of different generations of equipment of this brand.
Principles of operation of thermostats in Pozis refrigerators
The main element responsible for maintaining cold is thermostat (thermostat). Most classic models Pozis use a mechanical type of control that responds to changes in evaporator temperature. When the air inside the chamber cools down to the set value, the contacts open and the compressor stops. When the temperature rises, the process starts again.
Electronic control systems, found in more expensive or new modifications, operate on the basis of readings temperature sensorslocated directly in the air flow. Such systems allow you to set the temperature with an accuracy of a degree, which is impossible to do mechanically. However, even in simple models the principle remains the same: adjusting the cooling power.
⚠️ Attention: Never try to forcefully turn the mechanical thermostat knob if it is jammed. A sudden force can break the plastic rod or damage the internal membrane, which will require replacing the entire assembly.
It is important to understand that the thermostat does not measure the temperature throughout the entire volume of the chamber instantly. It reads data at a specific point, usually near the evaporator or in the cold air supply area. Therefore compressor operating cycle depends on many factors: the occupancy of the chambers, the frequency of opening doors and the temperature in the room.
Setting a mechanical temperature controller
The most common type of control in refrigerators Pozis is a rotary knob located inside the refrigerator compartment or on the front panel. The scale of such a regulator is usually marked with numbers from 1 to 5, 6 or 7, or verbal designations such as “Min” and “Max”. Many users mistakenly believe that the number indicates degrees Celsius, but this is not so.
In this system, the numbering indicates cooling intensity. The unit corresponds to the weakest operating mode of the compressor, at which the temperature in the chamber will be the highest (but still within the normal range for storage). The maximum number (for example, 5 or 7) means that the refrigerator will work almost non-stop, trying to reach the minimum possible temperature.
- 🌡️ Mode "1" or "Min" - suitable for the winter period, when the room is cool, or for storing products that do not require extreme cold, for example, some types cheeses.
- ❄️ Mode "3" or "4" is optimal setting for most situations, providing a balance between food safety and energy consumption.
- 🧊 Mode "Max" or "7" - used only for fast freezing or in very hot rooms, requires constant monitoring to avoid freezing of the back wall.
To change the mode, just turn the knob in the desired direction. You should not do this abruptly or jerkily; a smooth movement will ensure correct operation of the mechanism. After switching the mode, the refrigerator will need time (from 30 minutes to 2 hours) to stabilize the temperature background.
Temperature adjustment in models with electronic control
More modern series, such as Pozis RK-139 or Smart, are equipped with an electronic control unit with displaying information on the display. Here the adjustment is much more precise and convenient. Typically, the panel has separate buttons for the refrigerator (Fridge) and freezer (Freezer) chambers.
To change the settings, you must press the corresponding button. The numbers on the screen will begin to flash, signaling the transition to editing mode. Repeated presses will change the temperature value. In the refrigerator compartment the range is usually from +2 to +10 degrees Celsius, and in the freezer - from -6 to -24 degrees.
| Operating mode | HK temperature (°C) | MK temperature (°C) | Recommendation |
|---|---|---|---|
| Economy | +5...+6 | -16...-18 | For light loads |
| Standard | +3...+4 | -18...-20 | Daily use |
| Intensive | +2 | -22...-24 | Warm load products |
| Rest | +10...+12 | Off | Long absence |
A feature of electronic systems is the presence of a function Super Freeze (Super Freeze). When this mode is activated, the freezer operates at its maximum capacity, ignoring sensor readings in order to quickly freeze fresh meat or berries. You cannot enable this function manually on an ongoing basis - this will lead to overload of the compressor.
☑️ Checking the electronic panel
Optimal temperature conditions for different products
Not all products require the same storage conditions. Incorrect settings can cause the greens to wilt in a day, and the milk to sour ahead of schedule. In the refrigerator compartment Pozis there are zones with different temperatures, and knowledge of these nuances will help distribute food correctly.
The coldest zone is usually located at the back wall (in systems Direct Cool) or on the bottom shelf (in systems No Frost). Here the temperature can drop to +2°C. This is an ideal place for storing raw meat, fish and ready-made dishes that need to be eaten soon.
- 🥛 Door shelves - the warmest zone (+8...+10°C), suitable for sauces, drinks and foods with preservatives.
- 🥦 Vegetable containers - here it is maintained around +5...+7°C, which prevents freezing of water in plant cells.
- 🧀 The middle shelves are a universal zone (+3...+5°C) for dairy products, sausages and eggs.
If you notice that mucus appears on the vegetables, and an ice crust (“fur coat”) forms on the back wall of the refrigerator compartment, it means that the temperature is set too low or there is a malfunction defrost sensor. In such a situation, it is necessary to increase the value on the regulator (make the mode “weaker”).
Why does the back wall freeze?
In refrigerators with a drip defrost system, periodic ice formation on the back wall is a normal process. Ice builds up while the compressor is running and flows down when it turns off. The alarm should only be sounded if the ice turns into a thick layer of snow that does not have time to melt.
The influence of seasonality and load on the operation of the refrigerator
External conditions play a huge role in the efficiency of refrigeration equipment. In summer, when the temperature in the kitchen reaches +25...+30°C, heat exchange is difficult. Compressor Pozis you have to work longer to remove heat from the chambers. During this period, it is recommended to set the regulator to medium or slightly higher values (closer to “Max”), but not to the maximum.
In winter, the situation changes. If the refrigerator is placed in an unheated room or on a balcony (which is not recommended by the instructions), or simply in a cold kitchen, the temperature difference between the internal volume and the environment is minimal. In such conditions, the mechanical thermostat may not “feel” the need to turn on the compressor.
⚠️ Attention: Operating the refrigerator at an ambient temperature below +10°C (for climate class N) or +16°C (for climate class SN) can lead to incorrect operation of the thermostat and spoilage of food in the refrigerator compartment, even if the freezer is operating.
The degree of loading is also important. An empty refrigerator cools down faster, but also heats up faster when the door is opened. A full chamber holds the cold better ("thermal inertia"), but requires more time for initial cooling. If you loaded a lot of products at once, give the equipment 6-8 hours to enter the mode before the final temperature assessment.
Diagnosis of problems: when adjustment does not help
There are cases when twisting the regulator knob or pressing buttons on the panel does not produce any result: the temperature either does not drop, or, conversely, the food freezes even at the minimum setting. This may indicate technical malfunctions that cannot be resolved by simple setup.
One of the common problems is refrigerant leak. If there is not enough freon in the system, the compressor will work continuously, trying to increase the temperature, but the cold will not be produced in the required volume. In this case, the back wall may be barely warm or cold only at the entrance of the tube.
Another reason is a malfunction of the thermostat itself. If its contacts are “stuck” in the closed state, the compressor will not turn off. If it is open, the refrigerator will not turn on at all. It is also worth checking sealing rubber bands on the doors: if they do not fit tightly, warm air constantly enters inside, and no adjustment will help stabilize the climate.
The table below shows the main symptoms and possible causes:
| Symptom | Possible cause | Action |
|---|---|---|
| The compressor is humming, but there is no cold | Freon leak / Compressor malfunction | Call a technician |
| The refrigerator does not turn off | Thermostat is faulty / Leakage | Checking the thermostat |
| Foods in the refrigerator freeze | Thermostat is faulty / Capillary clogged | Adjustment or repair |
| Frost only in the corner | Incorrect placement of food | Redistribute food |
⚠️ Attention: If you hear relay clicks when you try to start the compressor, but it does not start, immediately disconnect the device from the network. Repeated starting attempts can permanently damage the electric motor.
Frequently asked questions (FAQ)
Which number on the Pozis regulator is considered normal for everyday use?
For most models with mechanical control, the position of the knob on the number is considered optimal 3 or in the middle of the scale (between 3 and 4, if there are 7 of them). This provides a temperature of about +4...+5°C, which is ideal for storing most products.
Why does the refrigerator take a long time to reach the temperature after defrosting?
After complete defrosting and turning on the power supply, the refrigerator Pozis may require 2 to 6 hours to reach operating mode. If you load products at this time, the process will take even longer. Let the appliance run empty for at least 1-2 hours.
Is it possible to install a refrigerator near a radiator or stove?
It is strictly not recommended. A heat source near the refrigerator disrupts the heat transfer of the condenser (black grille at the back). The compressor will work for wear, trying to compensate for external heating, which will lead to rapid failure and excessive consumption of electricity.
What to do if it is too cold in the refrigerator compartment and warm in the freezer?
This is a classic sign lack of refrigerant (of freon). The system first cools the freezer, and if there is little gas, it simply does not reach the refrigerator compartment in the required volume. Adjusting the thermostat will not help here - the system needs to be recharged by a specialist.
How to check the accuracy of the temperature without a thermometer?
The exact method is only using an external thermometer. However, you can indirectly judge by the condition of the products: if the butter is hard as a rock, it’s too cold; If the milk turns sour within 24 hours, it’s too warm. The water in a glass placed on the middle shelf should be noticeably cold, but not covered with an ice crust.