Finding a temperature sensor in the refrigerator Atlas often becomes the first step in diagnosing problems with temperature conditions. If the unit stops freezing or, conversely, begins to refreeze food, the reason may lie in this small but critically important element. Owners of household appliances are faced with the need to understand the design of the device in order to conduct a visual inspection or replace a failed part.
In models Atlant the location of the sensors depends on the type of defrosting system and the number of compressors. This is not a universal point where you can simply look by opening the door. In single-compressor models with the No Frost system, the defrost sensor is often hidden behind the rear panel of the freezer, hidden by a plastic casing. Understanding this specificity allows you to avoid unnecessary damage during disassembly.
Next we will look in detail where to look for sensors in various modifications, how to correctly identify them and what tools are needed to access them. It is important to act consistently, observing safety precautions, since working with electrical components requires care.
⚠️ Attention: Before starting any work to find or replace sensors, be sure to disconnect the refrigerator from the power supply. Working with live conductive elements is strictly prohibited and dangerous to life.
The principle of operation and types of sensors in the Atlant system
To effectively search thermal sensor, you need to understand its role in the overall control scheme. In refrigerators Atlant two main types of sensors are used: mechanical thermostats and electronic thermistors. Mechanical models respond to changes in freon pressure in the capillary tube, while electronic ones change their resistance depending on the ambient temperature.
Electronic sensors, or thermistors, are a hermetically sealed capsule with semiconductor material. They are installed directly in the refrigerator or freezer compartment, as well as in the evaporator area. The control unit reads the resistance readings and makes a decision to turn the compressor on or off. The accuracy of these readings directly affects the shelf life of the products.
- 🌡️ Air temperature sensor - monitors the overall climate inside the chamber.
- ❄️ Defrost sensor - located on the evaporator, records the moment defrosting is completed.
- 🔌 Condenser sensor - in some models monitors motor temperature.
In older models Atlant you can find combined systems where a mechanical thermostat controls the compressor, and an electronic sensor is responsible only for the indication or system No Frost. Differences in design also dictate different locations for their installation, which is important to consider when diagnosing.
Location of sensors in single-compressor models
In single-compressor refrigerators Atlas with one evaporator, usually located in the freezer, temperature sensors are often located in close proximity to the evaporator. To access them, in most cases you will need to remove the back wall of the freezer. This is a plastic panel that can be attached with latches or screws.
After removing the panel, you will have a view of the evaporator - the radiator through which the refrigerant circulates. The defrost sensor is usually attached to one of the evaporator tubes or inserted into a special socket on it. It is connected by wires to the main control unit, which in such models is often located at the top of the unit or behind a decorative panel.
If we are talking about an air temperature sensor in the refrigerator compartment, then in single-compressor models it can be built into the housing or displayed as a separate element on the side wall. Visually, it looks like a plastic tip from which a cable of wires comes.
☑️ Checking a single-compressor model
⚠️ Attention: Plastic becomes brittle at low temperatures. If you remove the panel immediately after using the refrigerator, be very careful not to break the fastening latches. Let the unit warm up for 10-15 minutes.
Searching for temperature sensors in two-compressor refrigerators
Two-compressor models Atlant have independent cooling circuits for the refrigerator and freezer compartments. This means that there are more sensors here, and they are located separately in each compartment. In the refrigeration chamber, the temperature sensor is most often hidden behind a plastic cover on the back wall or built into it.
In the freezer compartment of a two-compressor unit, the principle is similar to single-compressor models: the defrost sensor is located on the evaporator. However, the design may vary depending on the series. In some modifications, access to the sensor is possible only after complete defrosting and removal of the entire internal lining of the chamber.
To troubleshoot such systems, it is important to check both circuits. If the freezer is operating normally, but the refrigerator compartment is warm, the problem most likely lies in the refrigerator compartment sensor or in the control board responsible for this circuit. Diagnostics requires testing with a multimeter.
- 🧊 In the refrigerator compartment, look for a sensor on the back wall, often hidden by a decorative cover.
- 🔋 In the freezer compartment, access is by removing the rear panel of the evaporator.
- ⚙️ The control unit may be located in the base part or on top, where the wires from the sensors go.
Sometimes manufacturers Atlant hide the sensor contacts in a corrugated tube running along the wall. In this case, the sensitive element itself is located inside the chamber, and the wires go into the technological channel. When replacing, it is important not to damage the insulation of the wires when pulling.
Why is it more difficult to find a sensor in two-compressor models?
In two-compressor models there are more controls and a more complex wiring diagram. Sensors can be integrated into a single harness going to a common board, which requires careful study of the electrical circuit of a specific model.
Sensors in the No Frost system: access specifics
System No Frost in refrigerators Atlant assumes forced circulation air and automatic defrosting of the evaporator. The defrost sensor is critical here, which signals the control unit to turn on the heating element or, conversely, stop heating. It is located directly on the evaporator, which is hidden behind the rear panel.
The No Frost design feature is that the sensor is often mounted on a sealant or pressed tightly against the evaporator tube for better heat transfer. When replacing, you may need to carefully remove the old sealant and apply new sealant to ensure the temperature readings are correct. Without this, the sensor will show the air temperature, and not the evaporator temperature.
Also in the No Frost system there may be a drain pan overflow sensor or a temperature sensor of the air pumped into the chamber. They are located in the fan area or in the air supply duct. Access to them is also limited by plastic casings.
| Sensor type | Location | Function | Fault symptom |
|---|---|---|---|
| Defrost sensor | On the evaporator (behind the back wall) | Defrost control | Ice build-up, "fur coat" |
| Air sensor | Inside the chamber (on the wall or ceiling) | Maintain temperature | Compressor does not turn on |
| Heating element sensor | Near the heating element | Overheat protection | System error defrosting |
| Fan sensor | In the air circulation duct | Fan operation control | Noise, lack of cold |
When working with the No Frost system, it is important not to damage the fan blades when removing the panels. Often the sensors are fixed in hard-to-reach places, and to replace them you have to dismantle the entire evaporator assembly. This is a labor-intensive process that requires accuracy.
Diagnostics and checking the serviceability of the temperature sensor
Before disassembling the refrigerator in search thermal sensor, it makes sense to conduct an initial diagnosis. If you have a multimeter, you can check the resistance of the sensor without resorting to complicated disassembly if you have access to the contacts. Normal resistance at room temperature is usually several kilo-ohms (the value depends on the model).
For an accurate test, the sensor must be removed and placed in a container of water of a known temperature, lowering the multimeter probes into the same (maintaining insulation). The resistance should change smoothly when the water is heated or cooled. If the readings stand still or the device shows a break, the part is faulty.
Indirect signs of a sensor malfunction in refrigerators Atlant can be:
- 🚫 The refrigerator hums, but does not freeze.
- 🔥 In the chamber too warm, the food spoils.
- ❄️ Ice freezing in the refrigerator compartment (with a working compressor).
- 🔁 Frequent turning on and off of the unit.
If a visual inspection shows that the sensor is physically intact, the wires are not broken, but the refrigerator is not working correctly, most likely the problem is a change in its electrical characteristics. Replacing “just in case” in such situations is often the only way to restore functionality, since these parts are inexpensive.
Replacing the temperature sensor: step-by-step instructions
The replacement process begins with the purchase of a compatible part. For refrigerators Atlant, it is important to select a sensor with similar resistance characteristics and geometric dimensions. Universal sensors may not work correctly, so it is better to look for original spare parts or high-quality analogues.
After turning off the power and defrosting (if required), remove the panel behind which the sensor is hidden. Disconnect the wire connector. On some models, the connectors may be soldered together, which will require the use of a soldering iron and heat shrink to connect the new sensor. It is important to ensure the tightness of the connection so that moisture does not get inside the contacts.
Install the new sensor in place of the old one, securing it in the same way (clip, sealant or screw). Reassemble the structure in reverse order. After turning on the refrigerator, let it work for several hours without loading food to check the stability of the temperature regime.
⚠️ Attention: Technical characteristics of refrigerators may vary depending on the year of manufacture and the specific modification. Always check the part markings with the passport of your device or the catalog number on the manufacturer’s official website before purchasing a replacement.
Frequently asked questions (FAQ)
Is it possible to operate an Atlant refrigerator with a faulty sensor?
Long-term operation with a faulty sensor is not recommended. This can lead to spoilage of food, freezing of the evaporator and failure of the compressor due to incorrect operating cycles.
Where to buy an original temperature sensor for Atlant?
Original spare parts are best purchased from authorized service centers of the brand Atlant or from official dealers. This guarantees compliance with the technical parameters.
Why did the refrigerator not work after replacing the sensor?
There may be several reasons: the sensor is incorrectly selected, poor contact in the connection, the control unit is faulty, or the problem lies in another unit (compressor, freon). Repeated diagnostics are required.
How often should the temperature sensor be changed?
The service life of the sensor is not strictly limited by regulations. Replacement is made only upon failure. With careful use, they can last 10 years or more.