Many owners of household appliances are faced with a situation where the purchased one Atlant refrigerator no longer copes with freezing food or, conversely, turns vegetables into ice lumps. The reason is often a misunderstanding of the operating principle of a mechanical thermostat, where instead of exact degrees Celsius, only abstract numbers from 1 to 7 are indicated. This creates confusion: what does “three” mean - is it cold or is it already too frosty? The answer to this question is critical to maintaining food freshness and the correct operation of the compressor.
Unlike modern electronic panels with a display, mechanical regulators require an intuitive approach and understanding of the physics of the cooling process. Thermoregulator does not set the temperature directly, it only determines the moment when the compressor needs to turn on or switch off. The higher the number on the scale, the lower the temperature inside the chambers should drop, causing the motor to work harder and longer. Incorrect settings can lead to both product damage and failure of the unit itself due to overloads.
In this article we will look in detail at what number on the regulator Atlant approximately corresponds to what temperature, consider the differences between single-compressor and double-compressor models, as well as We will give practical advice on seasonal adjustments of settings. Understanding these nuances will help you extend the life of your equipment and avoid common operating errors.
The principle of operation of a mechanical thermostat
To properly configure refrigeration equipment, you need to understand the logic of its control. A mechanical thermostat is the simplest electromechanical device that responds to changes in temperature in the evaporator or inside the chamber. The scale with numbers from 1 to 7 (or sometimes up to 5) is not a linear temperature scale in degrees Celsius. This is the "appetite" scale of your refrigerator: the higher the number, the more aggressively it will cool the space.
The number "1" on the control panel means the minimum intensity of the compressor. In this mode, the engine turns on rarely and runs in short cycles. The temperature in the main chamber can fluctuate around +8...+10°C, which is not enough for long-term storage of perishable products. Conversely, setting the regulator to maximum (number 7) forces the compressor to work almost continuously or with very short breaks, trying to achieve extremely low values close to -18...-24°C in the freezer and +2...+4°C in the refrigerator.
It is important to note that the exact correspondence between the number and the degree depends on many factors: ambient temperature (room temperature), occupancy chambers with products and the technical condition of seals. Thermoregulator only creates conditions, but does not guarantee a fixed result under any external circumstances. That is why manufacturers recommend starting adjustments with average values.
⚠️ Attention: Never leave the regulator at the maximum value (6-7) on an ongoing basis unless there is an urgent need for it (for example, quick freezing of a large volume of food). This leads to excessive freezing of the evaporator, increased load on the compressor and increased energy consumption.
Why are there no exact degrees on the mechanics?
Mechanical thermostats were developed long before the advent of cheap digital displays. Their task is to maintain an approximate range, and not to record the temperature with an accuracy of tenths. Accurate calibration of each specific thermostat to a certain number is impossible in mass production, so the scale always remains relative.
Deciphering the thermostat scale: correspondence table
Although the exact values depend on the specific model and operating conditions, engineers Atlant Minsk Plant adhere to certain standards when calibrating thermostats. For most models with one compressor (where the cold is distributed across both chambers from one source), the scale from 1 to 7 is interpreted as follows. The numbers indicate cooling power levels.
Below is an average table showing what temperature is approximately set in the refrigerator compartment at different positions of the regulator handle. These data are relevant for standard conditions: room temperature +20...+25°C, normal loading with food and a working door seal.
| Knob position | Operating mode | Temperature in the refrigerator compartment (°C) | Freezer temperature (°C) |
|---|---|---|---|
| 1 (Min) | Minimum cooling | +8 ... +10 | -6 ... -8 |
| 3 (Average) | Optimal mode | +4 ... +6 | -12 ... -14 |
| 5 (High) | Intensive cooling | +2 ... +4 | -18 ... -20 |
| 7 (Max) | Frozen / Maximum | 0 ... +2 | -22 ... -24 |
As can be seen from the table, the “golden mean” for everyday use is position 3 or 4. This mode strikes a balance between food preservation and energy efficiency. Setting the value to 1 is often insufficient for the summer period, when the kitchen is hot, and the value 7 is justified only with the quick freezing function or in very hot rooms, but with the risk of freezing.
Features of setting up two-compressor Atlant models
Owners of modern models Atlant with two compressors are luckier: they have independent temperature control for the refrigerator and freezer compartments. Such devices usually have two separate thermostats. This allows you to flexibly adjust the microclimate: for example, in the freezer you can keep deep cold for meat, and in the refrigerator you can keep a slightly higher temperature for vegetables.
The numbering principle remains the same: the higher the number, the colder. However, thanks to the independence of the circuits, you can set mode “5” in the freezer for high-quality freezing, and leave “3” in the refrigerator so that the milk does not freeze at the back wall. This significantly saves equipment resource, since each compressor works only when its chamber really needs it.
When setting up a two-compressor unit, it is important to follow the sequence. First, let the refrigerator sit unplugged for a few hours after transport. Then turn it on and set both controls to the middle position (number 3). After 5-6 hours of operation, check the results using an external thermometer. If the freezer is not cold enough, add 1 notch on the appropriate dial. Do not change the settings more often than once a day, as thermal stabilization takes time.
⚠️ Attention: In two-compressor models, it is not recommended to simultaneously set both regulators to maximum (6-7) unless necessary. This creates a peak load on the apartment's electrical network and can lead to tripping of circuit breakers, especially in houses with old wiring.
Seasonal adjustment: summer and winter
The ambient temperature directly affects the operation of the refrigerator. Atlant refrigerator, like any other equipment, requires seasonal reconfiguration of the mechanical regulator In summer, when the room temperature rises to +28...+30°C, heat inflows increase. It becomes more difficult for the compressor to remove heat through the condenser (the grille at the back or on the sides).
During hot periods, it is recommended to shift the regulator towards lower values (closer to 2-3) if you notice that the refrigerator is running non-stop. Paradoxically, an attempt to set the maximum (6-7) in the heat can lead to the compressor simply not turning off, trying to achieve an unattainable ideal, which will lead to its overheating and breakdown. In winter, when the apartment is cool (+18...+20°C), you can safely turn the knob towards 4-5, since natural heat exchange is improved.
However, there is an important limitation on the ambient temperature. Most Atlant models are not designed to operate at temperatures below +10°C (for example, in an unheated country house or balcony). Under such conditions, the oil in the compressor thickens, and the refrigerant cannot circulate properly, which leads to failure.
☑️ Checking the seasonal setting
Diagnosis of problems through thermostat settings
Sometimes the incorrect position of the thermostat knob masks real malfunctions or, conversely, creates their illusion. If you turn the knob to 7, and the food in the refrigerator compartment is still warm (+10°C and above), this is a sure sign of a freon leak or a compressor malfunction. No “number” will help if there is no refrigerant in the system.
On the other hand, if at the minimum value (1) the food in the refrigerator compartment freezes, this may indicate sticking thermostat contacts or a refrigerant leak in dual-circuit systems (when the cold from the freezer goes down uncontrollably). The cause may also be damage to the door seal, due to which warm air constantly flows inside, forcing the compressor to work in increased mode even at low settings.
For accurate diagnosis, experts recommend using the control measurement method. Take a regular household thermometer (can be medical or for water, placing it in a container of water). Place it on the middle shelf, away from the back wall. Leave for 6-8 hours with the door closed. The measured temperature must correspond to the selected number on the regulator according to the table above. If the difference is large, you need to call a technician.
Frequent errors during operation
One of the most common errors is installation regulator to maximum immediately after turning on the new refrigerator or after defrosting. Operating instructions it is strongly recommended to let the equipment run idle for 2-3 hours on medium mode so that a stable temperature regime is formed. A sharp start at maximum creates excess pressure in the system.
Another mistake is frequent “twisting” of the handle. A thermostat is not a TV channel switch. Changing the setting should be done smoothly, waiting for the process to stabilize for at least 12-24 hours. Constant manipulations weaken the mechanics of the device, and it ceases to maintain calibration.
Also, users often ignore the fullness of the chambers. An empty refrigerator cools down faster, but it also heats up instantly when the door is opened. A full refrigerator (loaded with food) keeps the cold better due to the heat capacity of the food. If you store few products, it makes sense to set the regulator to a value closer to the minimum (2-3) to avoid wasting energy.
What to do if the regulator knob scrolls endlessly?
If the thermostat knob rotates without clicks and without a feeling of resistance (infinitely), this is a sign of a breakdown of the thermostat mechanism itself. In normal condition, when rotating, you should feel the clamps, and in extreme positions you should feel the stop. It is impossible to operate a refrigerator with a faulty regulator, since the compressor will either not turn on or will burn out from continuous operation. The thermostat needs to be replaced.
Is it possible to replace a mechanical regulator with an electronic one?
Theoretically this is possible, but in practice for Atlant refrigerators such an upgrade is extremely complex, is not economically feasible and requires deep knowledge in electronics. The electronics require temperature sensors (NTC), a controller and changes to the compressor wiring. It is easier and more reliable to replace a failed mechanical thermostat with an original analogue.
Why does ice form on the back wall of the refrigerator compartment?
The formation of a “fur coat” or ice on the back wall (crying effect) is normal for a drip defrosting system if the ice has time to melt during the idle cycle. However, if there is too much ice, check the position of the adjuster. It may be set at too low a temperature (5-7). Also check whether the food is pressed against the back wall, blocking the flow of water, and whether the door seal is intact.
How often do you need to defrost the Atlant refrigerator?
The frequency of defrosting depends on the thermostat settings and the humidity in the room. When operating at average values (3-4) and a working seal, modern Atlant models with a drip system require defrosting 1-2 times a year (or when the layer of ice in the freezer exceeds 5-7 mm). If you open the door frequently or the room is humid, you may need to defrost more often. Operating at maximum (6-7) accelerates the accumulation of ice.