Refrigerators of the brand Atlant are deservedly considered one of the most reliable in the post-Soviet space, however, even such proven equipment requires periodic attention to the settings. Thermoregulator is a key unit responsible for maintaining a stable temperature regime inside the chambers. It is on its correct operation that it depends whether your products will deteriorate and whether excess ice will form.
Many users are faced with a situation where the food in the main chamber freezes, and in the freezer, on the contrary, the ice melts. Often the reason lies not in a compressor failure, but in incorrect settings temperature sensor. Understanding the principles of operation of this mechanism will allow you to fix most problems yourself without calling a specialist.
In this article we will look in detail at where the regulator is located, how to set it up correctly for different models and what to do if mechanical adjustment stops helping. Correct calibration of the thermostat can extend the life of the compressor by 3-5 years by optimizing switching cycles. Let's look at this process in detail.
Location and types of regulators in Atlant refrigerators
Before you begin any manipulations, you need to accurately determine the type of regulator installed in your model. Most household refrigerators Atlant use a mechanical thermostat. It is a rotary handle located inside the fridge compartment.
Usually this control element is located on the upper inner wall or in the upper right corner of the chamber. In more modern models with electronic control, the setting is carried out through the display on the outer door, but the principle remains the same - you set the target temperature, and the system itself regulates the operation of the compressor.
The mechanical regulator has a scale of divisions, which can be indicated by numbers from 1 to 7 or from Min to Max. It is important to understand that the numbers on the scale do not correspond to degrees Celsius. They indicate the intensity of cooling: the higher the number, the colder it will be inside.
⚠️ Attention: In some older models, the thermostat knob may be hidden under a plastic casing or located next to the light bulb. Do not make excessive efforts when searching so as not to damage the plastic.
Electronic control systems found in the XM-4423 or XM-4625series allow you to set the temperature with an accuracy of a degree. However, even in them, settings may need to be reset or calibrated if the sensor begins to “lie.”
Operation principle and standard temperature values
For effective settings, you need to understand what indicators you are aiming for. Optimal temperature in the main chamber of the refrigerator should be in the range from +2 to +4 degrees Celsius. This is the gold standard for storing most products.
In the freezer, the temperature should not be higher than -18 degrees. It is at this value that products can be stored for months without loss of taste and beneficial properties. If the temperature is higher, the shelf life is sharply reduced.
A mechanical thermostat operates on the principle of opening and closing contacts. Inside the device there is a bellows (accordion) filled with gas or liquid. When heated, the gas expands and opens the circuit, turning off the compressor. When cooling, it contracts, including the motor.
- 🌡️ Division "1" or "Min" corresponds to the highest temperature (least cooling).
- ❄️ Division "3" or "4" is the average value for standard conditions.
- 🧊 Division "7" or “Max” makes the compressor work almost without interruption.
You should not constantly keep the regulator at the maximum value. This leads to hypercooling products in the main chamber and increased load on the engine, which increases energy consumption.
Step-by-step instructions for setting up a mechanical thermostat
Setting up a mechanical regulator is a simple but demanding process patience. You don't need any special tools, just time and perhaps a household thermometer to monitor the results.
First, clear space at the back wall of the refrigerator to allow free air circulation. This is important for correct readings. If the chamber is full of food, the thermostat may read the wrong temperature.
Turn the control knob to the position corresponding to the middle number of the scale (usually 3 or 4). Leave the refrigerator alone for 5-6 hours. During this time, the temperature will stabilize.
☑️ Checking the temperature setting
If after the time the temperature does not correspond to the desired one, turn the knob one division in the desired direction. If it's cold - counterclockwise, if warm - clockwise. Each change requires re-waiting for stabilization.
⚠️ Attention: Do not re-adjust earlier than 4-5 hours after the previous turn of the knob. The inertia of the system is high, and you can disrupt the compressor cycle.
Remember that the time of year affects the settings. In the summer, when the room is hot, it may be necessary to increase the cooling, and in the winter, to weaken it if the refrigerator is in an unheated room (although for most models Atlant operation at temperatures below +10°C is not recommended).
Temperature adjustment in two-chamber models
In two-chamber refrigerators Atlant one compressor and one thermostat are often used, which controls the temperature only in the refrigeration chamber. The freezer is cooled according to the residual principle.
This means that by adjusting the temperature in the upper compartment, you indirectly influence the lower one. If you set the temperature in the refrigerator compartment too high, food in the freezer may begin to thaw.
In models with a system No Frost or partial No Frost, the distribution of cold is more uniform, but the principle of setting the main thermostat remains the same. It is important to ensure that the ventilation holes are not blocked by food.
If you notice that at a comfortable temperature in the main chamber of the freezer it is too warm, the problem may not be in the settings, but in a freon leak or a malfunction of the damper.
| Handle position | Temperature in the chamber (approximately) | Compressor operating mode | Recommendation |
|---|---|---|---|
| 1 (Min) | +5...+7°C | Short cycles, rare starts | Only for short-term storage |
| 3 (Avg.) | +2...+4°C | Normal operating cycle | Daily operation |
| 5 (Max) | 0...+2°C | Long work, short pauses | Hot summer or heavy load |
| 7 (Max) | 0...-1°C | Almost without stops | Superfreezing mode (temporarily) |
What is Superfreezing?
Superfreezing mode forcibly turns on the compressor for continuous operation. In mechanical models, for this purpose the thermostat knob is moved to the extreme right position. You can use this mode for no more than 24 hours, otherwise the motor may overheat.
Diagnostics of thermostat malfunctions
How to understand that the thermostat is broken and its adjustment will no longer help? There are several obvious signs indicating the failure of this component. Faulty sensor may give false readings or stop responding to changes altogether.
The first sign is that the refrigerator does not turn on at all. The light is on, there is power, but the motor is silent. If you don’t hear a characteristic click when you turn the knob to the extreme position, the contacts inside the thermostat may have oxidized or burned out.
The second sign is that the compressor is running non-stop. Even if you turn the knob to minimum, the motor does not turn off. This leads to the formation of a “coat” of ice on the back wall and freezing of food.
- 🔌 Check the integrity of the wire going from the thermostat to the compressor.
- 🔨 A light knock on the regulator body sometimes helps if the contacts are “stuck” (temporary solution).
- 🌡️ Use a multimeter to “test” the thermostat contacts in cold and warm states.
If you find that the bellows (corrugated tube of the sensitive element) is damaged or gas has come out of it, the regulator must only be replaced. Repair at home is impossible.
⚠️ Attention: Before any electrical diagnostics, be sure to unplug the refrigerator! Working with electricity requires compliance with safety rules.
Replacing the thermostat yourself
If the setting does not help, and diagnostics have confirmed a breakdown, you will have to replace the thermostat. For refrigerators Atlant universal models are suitable, such as TAM-133 or K-59, but it is better to look for the original by the part number.
First remove the plastic handle and decorative trim. Typically the thermostat is secured with screws or clips. Carefully disconnect the wires, having previously photographed the connection diagram so as not to confuse them during assembly.
Pay special attention to the capillary tube. It is very thin and breaks easily. In some models it is fixed in a special hole on the back wall inside the camera. You need to pull it out carefully, without jerking.
Procedure:1. Turn off the power.
2. Remove the handle and casing.
3. Unscrew the thermostat mount.
4. Disconnect the wires.
5. Remove the old capillary tube.
6. Install a new tube and secure it.
7. Connect the wires according to the diagram.
8. Assemble the structure.
After replacement, it is necessary to conduct a test run. Turn on the refrigerator and leave it empty for several hours. Check whether the compressor turns off when the desired temperature is reached.
Frequent errors during operation and their consequences
Many problems with temperature conditions arise due to improper operation, and not due to equipment failure. Understanding these nuances will help you avoid unnecessary expenses on repairs.
A common mistake is installing the refrigerator close to the wall or in a niche without gaps. Heat transfer This is broken, the compressor overheats and wears out, trying to reach the set temperature.
Another error is loading hot products. The thermostat detects a sharp rise in temperature and forces the motor to work in increased mode. This can lead to the formation of an ice crust and failures in the defrosting cycle.
Do not forget to regularly defrost the refrigerator if your model does not have a No Frost system. A thick layer of ice on the evaporator acts as a heat insulator, which is why the temperature sensor “thinks” that the chamber is still warm and does not turn off the compressor.
It is also worth mentioning the tightness of the door closure. If the seal is worn out and the door does not fit tightly, warm air constantly enters the chamber. The thermostat will constantly keep the compressor on, but will not reach the desired temperature.
Why does the Atlant refrigerator not turn off after setting?
If you have set the minimum temperature, and the compressor hums continuously, there may be several reasons. First, check the tightness of the door. Secondly, make sure that the thermostat is working properly (see the diagnostics section). Thirdly, there may be a refrigerant leak, and the compressor simply cannot build up pressure to shut down.
Is it possible to replace a mechanical thermostat with an electronic one?
Theoretically, this is possible, but requires a deep modernization of the control system, including the installation of a controller, a new sensor and an indication panel. For ordinary users, such a modification is not economically feasible and may violate the warranty or the operation of factory electronics.
What temperature should be in the Atlant freezer?
The optimal temperature for long-term storage of food in the freezer is considered to be -18°C. In this mode, bacteria do not multiply, and the products retain their properties for up to 12 months. Short-term storage allows temperatures down to -12°C, but the shelf life is reduced to 1-3 months.
What to do if the thermostat knob spins endlessly?
If the knob turns without clicks or changes in resistance, this is a sign of a breakdown of the internal thermostat mechanism. Most likely, the spring has burst or the bellows has collapsed. In this case, adjustment is impossible; a complete replacement of the unit is required.