Finding the installation location of a thermostat or thermistor in brand refrigerators Atlant is the first and most important step in troubleshooting problems associated with incorrect cooling of products. Often, users are faced with a situation where the equipment stops turning off or, conversely, does not start the compressor, and the reason lies precisely in the failure of the temperature sensor readings. Understanding where is the temperature sensor in the Atlant refrigeratorwill allow you to carry out initial diagnostics or independently replace a failed element without calling a technician.
The location of this unit directly depends on the type of defrosting system and the design of the specific model of your unit. In older modifications with a drip moisture removal system and in modern devices with the No Frost function, the mounting points of the sensors differ significantly. In this article we will analyze in detail all possible placement options so that you can accurately determine the location of the part in your case.
Before starting disassembly, you need to turn off the power to the household appliance and prepare a minimum set of tools. You will need a flathead and Phillips screwdriver, and possibly a multimeter to test the continuity. Do not forget that any work with electrical appliances requires compliance with safety measures, so access to internal components should be carried out only after unplugging the power cord from the outlet.
Types of temperature sensors in Atlant technology
Belarusian-made refrigeration equipment uses two main types of devices that respond to changes in thermal conditions. The first type is mechanical thermostat, which is a sealed capsule with gas or liquid connected to a bellows and a contact group. Such regulators are most often found in classic two-chamber models with manual defrosting or a drip system.
The second type is electronic thermistor (or temperature sensor), operating based on changes in the resistance of a semiconductor element depending on temperature. These components are typical for more modern series Atlant with electronic control and system No Frost. They transmit signals to the electronic control module, which already makes a decision to turn the compressor on or off.
- 🔹 Mechanical thermostat: works on the principle of expansion/compression of the working fluid in a capillary tube, requires physical adjustment with a screw.
- 🔹 Electronic thermistor: changes the resistance, connects to the control board, provides high precision control.
- 🔹 Defroster: a separate type of sensor for the system No Frostthat controls the heating of the evaporator during defrosting.
You can determine what type of device is installed in your refrigerator by the presence of a temperature control knob inside the chamber. If you simply turn the knob from 1 to 7, then you have a mechanical thermostat. If there is a display with numbers on the door or outside, it means that control is carried out electronically through thermistors.
Location of the sensor in single-chamber refrigerators
In single-chamber models Atlant, where the freezer compartment is represented by a small box inside the main chamber, the temperature sensor is always located in the main refrigerator compartment. This is logical, since this is where the bulk of products that require cooling to +2...+5 degrees are stored.
Most often, a mechanical thermostat is hidden under a plastic cover, which is located directly above the door or on the side of it, in the upper corner of the chamber. To get to it, you need to carefully remove this decorative panel by unscrewing one or two screws, or prying the latches with a flat-head screwdriver. Under the cover you will see the thermostat housing with a long capillary tube coming out of it. The capillary tube of the thermostat is very thin and fragile. When dismantling or installing a new element, it is strictly forbidden to bend it, twist it or apply excessive force, since a violation of the tightness will lead to instant damage to the sensor. capillary tube.
⚠️ Attention: The thermostat capillary tube is very thin and fragile. When dismantling or installing a new element, it is strictly forbidden to bend it, twist it or apply excessive force, since a violation of the tightness will lead to instant damage to the sensor.In some modifications of single-chamber refrigerators, the end of the capillary tube can be fixed in a special hole on the back wall or mounted into the evaporator. It is important not to damage the tube insulation during reassembly, otherwise the refrigerator will not work correctly, often turning on or forming excessive ice.
Finding a thermostat in two-chamber models
In two-chamber refrigerators Atlant with a separate freezer the situation is a little more complicated. Here the thermostat is also located in the upper refrigerator compartment, but its accessibility depends on the interior design. In most cases, it is hidden behind a plastic casing located in the upper right or left corner of the main chamber.
To access the unit, you need to remove the shelves located under the thermostat and unscrew the fasteners of the protective box. Sometimes it is necessary to remove the entire top panel of the refrigerator compartment. Inside you will see the regulator itself with a handle and a tube extending from it, which goes deep into the wall or is attached to the evaporator.
📊 What problem are you facing?The refrigerator does not turn offThe upper chamber does not freezeThe compressor is constantly runningA click is heard, but does not startIt is worth noting that in two-chamber models the sensor controls the temperature in the refrigeration chamber. The freezer compartment is cooled due to the cooling capacity of the system, and if there is no cold in it, but everything is normal in the top, the problem is most likely not in the thermostat, but in a freon leak or a compressor malfunction.
If your refrigerator is equipped with an electronic control system, then there may not be a physical thermostat with a handle inside the chamber at all. In this case, thermistor hidden deep inside the structure, often behind the back wall or in the evaporator area, and access to it requires partial disassembly of the case.
Sensors in the No Frost system: where to look
Refrigerators Atlant with the system No Frost have a more complex sensor structure. There may be several of them: one controls the air temperature in the chamber, and the other (defroster) monitors the temperature of the evaporator to control defrosting cycles.
The main air temperature sensor in such models is often located on the inner wall of the chamber, sometimes it is covered with a decorative grille of the air circulation system. To find it, you need to remove all the drawers and shelves, and then dismantle the back panel inside the refrigerator or freezer (depending on where the failure occurred).
The defrost sensor (defroster) is always located directly on evaporator. In refrigerators Atlant the evaporator is usually hidden behind the back wall of the freezer or behind a panel at the top of the refrigerator compartment (depending on the layout). To access it, you will have to remove the entire back plastic panel inside the chamber, which requires care, since the plastic becomes brittle in the cold.
- ❄️ Defrost sensor: attached to the evaporator, often in its lower part, controls the heating of the heating element.
- ❄️ Air sensor: located in the air channel, measures the temperature circulating in the chamber.
- ❄️ Overflow sensor: in some models it is located in the area of the drain hole to control condensate removal.
When replacing sensors in the system No Frost it is critically important to correctly install them in their seats and ensure tight contact with the surface they are supposed to monitor. A loose fit will lead to false readings and malfunctions of the unit.
Instructions for dismantling and checking the sensor
Once you have determined where the temperature sensor is located in your refrigerator Atlant, it must be removed for inspection. The process of dismantling a mechanical thermostat is usually simple: you need to unscrew the fastening nut, remove the regulator handle and carefully pull the body along with the tube out of the mounting hole.
For electronic thermistors, the procedure is more complicated: you need to disconnect the chip with wires from the connector and remove the element itself from the socket. Before checking with a multimeter, be sure to take a photo of the connection diagram so as not to mix up the contacts during assembly.
☑️ Checking the sensor with a multimeter
Completed: 0 / 1The check is carried out by dialing the contacts. At room temperature, the contacts of the mechanical thermostat should be closed (or open when heated by a hairdryer). The resistance of the thermistor must correspond to the nominal value (usually about 5-10 kOhm at +25°C) and change when the element is heated or cooled. If the multimeter shows a break or the resistance does not change, the sensor is faulty.
⚠️ Attention: When installing a new thermostat, make sure that its markings completely match the markings of the old device. Different models of thermostats have different lengths of the capillary tube and temperature response range, which is critical for the correct operation of the refrigerator.If you are changing an electronic sensor, try not to touch the most sensitive element with your fingers, as grease contamination can affect the accuracy of the readings. Install the part carefully, without distortions.
Table of common sensor malfunctions
Understanding the symptoms helps to quickly diagnose the problem. Below is a table that will help compare the behavior of your refrigerator Atlant with a possible malfunction of the temperature sensor.
Symptom Probable cause Actions The refrigerator does not turn off, it works constantly Thermostat contacts are stuck or there is a gas leak from the capillary Replacing the thermostat The refrigerator does not turn on, inside heat Thermostat circuit is open, there is no signal to start Checking the contacts with a multimeter Ice freezes in the refrigerator compartment The defrost sensor (in No Frost) or thermostat is faulty Checking the defrosting system The compressor turns on rarely, food spoils The calibration has gone wrong or the spring has weakened Adjusting or replacing the sensor Analysis of the behavior of the compressor and the temperature conditions inside cameras allows you to determine with a high degree of probability whether the problem lies in electronics or mechanics. However, for an accurate diagnosis it is better to use measuring instruments.
Is it possible to temporarily close the thermostat contacts?
Yes, you can connect the wires directly so that the refrigerator works by bypassing the regulator. But this is a temporary measure: the compressor will run continuously until you manually break the circuit. This is dangerous due to overheating and damage to the motor.
Tips for installing a new element
When installing a new temperature sensor in the refrigerator Atlant it is important to follow the sequence of actions. First, install the thermostat housing in place, secure it with a nut or screws, and only then carefully insert the capillary tube into the channel. Sudden movements can lead to breaks.
If you are changing an electronic thermistor, make sure that the wires are not pinched by the device body and do not touch moving parts (for example, a fan in the system No Frost). Securely fix the connector on the control board until you hear a characteristic click.
After replacing the mechanical thermostat, it may take time for the temperature to stabilize. Do not load the chamber with food immediately, let the refrigerator enter the operating cycle.
In conclusion, it is worth noting that although replacing the temperature sensor is a procedure available to a home craftsman, it requires care. The most common mistake during self-repair is damage to the capillary tube during installation.which makes the new sensor unsuitable. If you are not confident in your abilities, it is better to contact a specialized service.
How often do you need to change the temperature sensor in the refrigerator?
Temperature sensors are reliable elements and do not have a set service life. They are replaced only if they fail, which can happen after 5-10 years of operation or earlier due to power surges in the network.
Is it possible to repair an old thermostat?
Mechanical thermostats are considered non-separable devices. Attempts to repair them (disassembling the housing, bending the contacts) usually do not give long-term results, since the tightness of the bellows is broken. A complete replacement of the unit is recommended.
Why does the new sensor not fit?
Capillary tubes of thermostats can have different lengths. If the tube is longer, it can be carefully twisted into a large diameter ring and placed in free space. In short, sometimes the standard length is enough, but it is important that the sensitive element is in the temperature control zone.
Does the temperature in the room affect the operation of the sensor?
Yes, mechanical thermostats are sensitive to the ambient temperature. If the refrigerator is in an unheated room at a temperature below +10°C, the thermostat may not turn on the compressor, believing that it is already cold enough in the chamber. For such conditions, special models of thermostats are needed.