When the cooling system in the refrigerator Atlant stops working correctly, the culprit is often a faulty thermostat. This small but critical component is responsible for maintaining the set temperature, turning the compressor on and off as needed. If you notice that the unit works without interruptions or, on the contrary, does not start at all, and inside the chamber the products begin to deteriorate or, on the contrary, freeze, there is a high probability that replacement of the thermostat is required.
Independent installation of a new temperature regulator is a completely solvable task for a person with basic skills in working with tools. However, the process requires care, especially when working with electrical contacts and the sensor's fragile capillary tube. Incorrect installation can lead to incorrect operation of the entire system or even damage to the refrigerant circuit, so it is important to strictly follow the action algorithm.
In this guide we will analyze all stages of the work: from preparing tools and dismantling the old device to setting up a new thermostat. We will pay special attention to the nuances of installation on different models of refrigerators Atlant, since the location and method of attachment may differ. Correctly performed repairs will extend the life of your equipment and save on calling a technician.
Fault diagnosis and choice of thermostat
Before you start disassembling the refrigerator, you need to make sure that the problem lies in the thermostat. Often, symptoms of a compressor or start relay malfunction are disguised as a breakdown of the temperature sensor. The main sign of failure of the thermostat is the absence of a characteristic click when turning the adjustment knob, as well as the inability of the device to turn off the compressor when the set temperature is reached.
For accurate diagnosis, you can use the exclusion method. If the compressor starts when the thermostat is turned off (the contacts are closed), then the problem is in the regulator itself or in the cold supply to the sensor. It is also worth checking the integrity of the capillary tube: if it is damaged or the freon inside it has evaporated, the thermostat will not be able to respond to temperature changes.
⚠️ Attention: If you find traces of oil or the smell of refrigerant in the place where the thermostat is mounted, the system may have depressurized. In this case, simply replacing the thermostat will not help - you need to call a specialist to fill it with freon.
When choosing a new spare part for Atlanta it is important to take into account not only the external similarity, but also the technical parameters. Thermostats are marked with an alphanumeric code, where the letters indicate the area of application, and the numbers indicate the temperature range of operation. Installing an unsuitable model will result in the refrigerator either undercooling the food or operating in constant freezing mode.
Necessary tools and safety measures
High-quality installation of the thermostat is impossible without the correct tools. You will need a standard set of screwdrivers (flathead and Phillips) to remove panels and fasteners. To work with contacts and wires, pliers and, preferably, a multimeter to check the integrity of the circuit are indispensable. You may also need an insulation stripper if you need to extend the wires.
Safety is the number one priority in any electrical repair. Before starting work, the refrigerator must be turned off from the mains. You should not rely only on the switch on the case; it is better to remove the plug from the socket. This will eliminate the risk of electric shock if you accidentally touch exposed wires or terminals.
Particular care should be taken when working with the capillary tube of a new thermostat. This is a thin copper tube filled with a filler gas. It is extremely easy to damage it with a sharp edge of the case or a tool. Any microcrack will lead to a gas leak and the new thermostat will not work. Protect the tube from creases and sharp bends.
☑️ Preparation for repair
Removing the old thermostat
The process of removing the old temperature controller in refrigerators Atlant begins with releasing access to it. In most models, the thermostat is located inside the refrigerator compartment, often hidden behind a plastic panel or directly under the adjustment knob. In some two-chamber models, access can be achieved through the upper part of the case from the outside, but more often you have to work inside.
The first step is to carefully remove the temperature control knob. It may be a tight fit, so pull it carefully to avoid breaking the stem. Then remove the mounting screws that hold the plastic trim or casing in place. Below them you will see the thermostat itself, mounted on a bracket or inserted into a special socket.
Next you need to disconnect the electrical wires. Before doing this, it is strongly recommended to photograph the connection diagram or sketch the colors of the wires going to the terminals. This will help avoid mistakes when installing a new device. Unscrew the terminal screws or snap off the clamps, then carefully remove the thermostat along with the capillary tube from the mounting hole.
When removing the capillary tube from the evaporator, act as delicately as possible. The tube can be glued or simply inserted into the process hole. If it is glued, use a hair dryer to gently loosen the glue, but do not overheat the plastic of the camera. Sudden movements can lead to a break in the tube inside the channel, which will require complex disassembly of the evaporator.
What to do if the wiring is oxidized?
If you find oxidized contacts or melted insulation, strip the wires to bare metal and, if necessary, extend them using heat-shrinkable tubing for insulation. Poor contact will cause heating and may cause a fire.
Installation and connection of a new thermostat
Installation of a new thermostat is carried out in the reverse order of dismantling. First, insert the capillary tube into the same hole where the old one came out. The immersion depth must be identical for the sensor to correctly read the evaporator temperature. If the new tube is longer, carefully roll the excess into a ring without bending it, and secure it in a free space so that it does not touch moving parts or hot components.
Secure the thermostat housing in its original place. Make sure it fits snugly and doesn't wobble. Compressor vibration should not be transmitted to the thermostat, as this may cause false alarms or contact rattling. After fixing the housing, proceed to connecting the electrical part.
Use the photos or recordings you took earlier to connect the wires to the terminals of the new thermostat. Color markings may differ depending on the manufacturer of the spare part (for example, There-133 or K-59), so be guided by the diagram of your specific refrigerator. Usually the wires have color insulation: black, red, yellow with a green stripe (grounding) and others.
Check the reliability of the wires in the terminals. They should not fall out with a slight tug. After connecting, assemble the plastic casing and install the adjustment knob in place. Do not plug in the refrigerator yet - first you need to configure it.
Adjusting and setting the temperature regime
After installing a new thermostat, it needs to be configured. At the factory, regulators are often set to average settings, which may not suit the operating conditions of your refrigerator. Adjustment is made using a special screw located on the thermostat body, or by rotating the knob in a certain range.
To access the adjusting screw, it is often necessary to remove the handle and protective cover. There may be a seal or paint on the screw that secures the factory settings. Turning the screw clockwise usually increases the shutdown temperature (the refrigerator will turn off at a higher temperature), and counterclockwise - lowers it.
Setting is an iterative process. Turn on the refrigerator and let it run for a few hours. Use a thermometer placed in a glass of water in the center of the chamber to monitor the actual temperature. The optimal range for the refrigerator compartment is from +2 to +6 degrees Celsius.
⚠️ Attention: Do not turn the adjusting screw sharply or to large values. Make turns literally 1/8 or 1/4 turns and wait for the mode to stabilize. A sharp twist can lead to freezing of the evaporator or spoilage of products.
If, after installation, the temperature in the chambers does not stabilize within 24 hours, the thermostat may be selected incorrectly or additional adjustment of the length of the capillary tube is required (in some models). It is also worth checking the tightness of the door and the integrity of the seal, since heat inflows from the outside can disrupt the settings.
Typical connection diagrams for different models
Although the principle of operation of thermostats is the same, connection diagrams in refrigerators Atlant may vary depending on the series and year of manufacture. Below is a table to help you navigate the color marking of wires for the most common modifications.
| Thermostat model | Wire color 1 | Wire color 2 | Wire color 3 | Note |
|---|---|---|---|---|
| There-133 | Red | Green | Yellow | Case grounding |
| K-59 | Black | Brown | Orange | Often used in new models |
| T-110 | Gray | Black | - | Two-pin circuit |
| T-130 | Red | Green | Yellow | Analog Tam-133 |
It is important to understand that the colors of the wires in the refrigerator itself may differ from the colors of the wires on the new thermostat. Therefore, when connecting, be guided not only by color, but also by the logic of the circuit: one wire usually goes from the network (phase), the second to the compressor, the third to the lamp or fan (if provided).
Frequent errors during self-installation
Independent repair is often accompanied by errors that can negate all efforts. One of the most common is incorrect placement of the capillary tube. If it does not fit tightly to the evaporator or is too far from it, the thermostat will “lie”, showing the wrong temperature. This leads to rare starts of the compressor and defrosting of food.
Another error is poor electrical contact. Loose terminal screws or oxidized connections lead to heating of the contact point, sparking and eventual burnout of contacts. This can damage not only the thermostat, but also the starting relay or compressor windings.
Grounding is also often forgotten. If your circuit had a ground wire (usually yellow-green), it must be connected to the appropriate terminal or housing. The lack of grounding makes the operation of the refrigerator dangerous, especially in conditions of high humidity in the kitchen.
⚠️ Attention: Technical characteristics and connection diagrams may vary slightly depending on the specific modification of your Atlant refrigerator. Always check the technical documentation supplied with the device, or look for the diagram on the inside of the rear wall of the unit.
Can you use a thermostat from another brand?
Yes, you can, if the dimensions, capillary tube length and temperature response range match. However, it is better to look for original spare parts or proven analogues specifically designed for Atlant refrigerators.
Checking operation after installation
The final stage is testing the assembled refrigerator. Turn on the unit and set the control knob to the middle position. During the first hour of operation, listen to how the compressor operates. It should turn on, work for a certain time and turn off when the thermostat clicks.
Pay attention to the cyclical operation. The normal mode is when the refrigerator runs for about 10-20 minutes, and then rests for 20-40 minutes (depending on the load and ambient temperature). If the compressor hums continuously for more than an hour and does not turn off, the thermostat may require adjustment or is installed incorrectly.
Check the temperature in the chambers after 4-6 hours of operation. In the refrigerator compartment it should be stable, without sudden jumps. The freezer should also be set to deep freeze. If all parameters are normal, the installation of the thermostat can be considered successful.
How often do you need to change the thermostat in the Atlant refrigerator?
The thermostat is a reliable unit that lasts on average 5-10 years. However, its service life depends on the frequency of voltage drops in the network, operating conditions (humidity, temperature in the kitchen) and the quality of the spare part itself. It only needs to be changed if obvious signs of a malfunction appear: refusal to turn on/off or incorrect temperature maintenance.
Is it possible to temporarily close the thermostat contacts?
Yes, by closing the contacts, you can start the compressor directly to check its operation. However, you cannot leave the refrigerator in this mode for a long time: without temperature control, the compressor will work continuously, which will lead to freezing of the evaporator, food spoilage and eventual combustion of the motor.
Why does the new thermostat click, but the refrigerator does not cool?
If there are clicks, then the electrical part is intact. The problem may be that the capillary tube does not sense the cold (poor contact with the evaporator), or there is a freon leak in the refrigerator itself, a blockage in the system, or a compressor malfunction. The thermostat regularly gives the command to turn on, but there is no cooling capacity.
Where can I find the thermostat marking if it is erased?
If the marking on the body itself is not readable, look for information in the refrigerator passport or on specialized repair forums. You can also determine the type by appearance, tube length and contact location by comparing with spare parts catalogs for your model Atlanta.
Do you need to defrost the refrigerator before replacing?
Full defrosting is desirable to remove excess moisture and facilitate access to nodes. However, if you work quickly and carefully, you can do without complete defrosting by simply turning off the unit during repairs. The main thing is not to damage the ice crust on the evaporator, if there is one, so that water does not get on the electrical contacts.