Finding the place where it is thermal sensor in the Atlant two-chamber refrigeratorbecomes critically important when the equipment stops maintaining the temperature correctly. The owner may be faced with a situation where the food in the main chamber begins to thaw, and excessive ice forms in the freezer, or the compressor works without interruption, trying to cool a volume that has long reached the required values. Understanding the design of the temperature control system allows you not only to quickly diagnose the problem, but also to avoid calling a technician in cases where the malfunction can be fixed independently.
In modern and classic models of the brand Atlant the thermoregulation system can be implemented in different ways: from simple mechanical thermostats to complex electronic ones sensors integrated into the control system. Thermal sensor - these are the “eyes” of your refrigerator, informing the control unit about the current state inside the chambers. If this element fails or moves from its normal place, the entire logic of the unit’s operation is disrupted, which leads to damage to products and excessive energy consumption.
In this material we will analyze in detail exactly where to look for this important element in two-chamber models, how its location differs depending on the type of control (mechanical or electronic) and how to correctly diagnostics. You will learn what tools are required to access the sensor and what nuances you should pay attention to in order not to damage fragile parts during disassembly.
Differences in temperature control systems in Atlant models
Before you start searching, you need to clearly understand what modification of the refrigerator you are dealing with, since location of the sensor it directly depends depending on the type of control. In Atlant two-chamber refrigerators, two main systems are most often found: mechanical, where a thermostat with a bellows tube is used, and electronic, where digital thermistors (NTC sensors) are responsible for temperature control. You can visually distinguish them by the control panel: if the door has a display with numbers or buttons for setting degrees, you have an electronic system.
In mechanical models, the main element is thermostatwhich physically opens the electrical circuit when a certain temperature is reached. Its sensitive part - the capillary tube - must be in contact with the cooled object. In electronic models, measurements are taken continuously and the signal is transmitted to the control module. An error in determining the type of system can lead to you looking for a digital sensor where it physically cannot be.
It is worth noting that in two-chamber refrigerators with a system No Frost or “Crying evaporator”, the number of sensors may vary. Usually there are at least two of them: one controls the temperature in the refrigerator compartment, the other in the freezer. In more complex systems, evaporator defrost sensors and environmental sensors are added.
Localization of the temperature sensor in the refrigerator compartment
If your refrigerator is equipped with an electronic control system, then the temperature sensor in the refrigerator compartment is most often hidden from the user’s eyes. In most two-chamber Atlant models, it is hidden behind a decorative panel on the back wall of the chamber or inside the lighting shade. To access it, you often need to carefully remove the plastic cover, which can be attached to latches or screws hidden under the plugs.
In models with mechanical control, the role of the sensor is performed by a sensitive tube thermostat. It can be mounted on the back wall, inside a special channel, or even immersed in a technological hole. Sometimes the tube is simply pressed against the evaporator under the top cover of the refrigerator compartment. It is important not to damage this thin tube, as leakage of freon from the thermostat bellows will render it unusable.
⚠️ Attention: When dismantling the plastic panels inside the chamber, proceed with extreme caution. Plastic becomes brittle at low temperatures and can crack from careless movement. Before removing parts, it is recommended to let the refrigerator warm up a little or work very gently.
Often users confuse the temperature sensor with the defrost sensor, but their functions and installation locations differ. The refrigerator compartment sensor monitors the general temperature background so that food does not freeze or spoil. Its readings directly affect the duration of the compressor operation in the cooling cycle.
Where to look for the sensor in the freezer compartment and on the evaporator
In the freezer compartment of a two-chamber Atlant refrigerator, the situation is more complicated due to low temperatures and the presence of ice. If you have a No Frostsystem, then the temperature and defrost sensors are usually located directly on the evaporator, which is hidden behind the back panel of the freezer. To get to them, you will have to completely defrost the chamber and remove the back wall, which requires time and care.
In models with manual defrosting or a “crying” system, the sensor can be built into the wall or attached to the surface of the evaporator. In some modifications, access to it is possible through a technical hole located in the upper part of the freezer. Thermistor in this area it is critical to prevent the formation of a “fur coat” and control the operation of the defrosting heating element.
Why do sensors in the freezer fail more often?
The main reason for frequent breakdowns of sensors in the freezer is constant temperature changes and high humidity. Freezing and defrosting cycles (even automatic ones) create condensation, which can penetrate inside the sensor housing, causing oxidation of the contacts or changes in resistance. In addition, mechanical damage when chipping ice with a knife is also a common cause of failure.
When troubleshooting a freezer, pay attention to the condition of the wiring. Often the problem lies not in the sensor itself, but in a broken wire that goes from the sensor to the control board. Wires may freeze or be damaged by sharp edges of ice.
Instructions for accessing and replacing the sensor
The process of replacing a temperature sensor requires preparation and compliance with safety precautions. The first step should always be to completely unplug the refrigerator. Working with electrical appliances under voltage is unacceptable, and in conditions of humidity inside the chamber, the risk of electric shock increases.
Next, it is necessary to empty the chamber of food and, if necessary, completely defrost it within 10-12 hours. This is especially important for models No Frostwhere ice can hide fasteners and the sensor itself. After defrosting, remove the decorative panels using a screwdriver or a plastic spatula so as not to scratch the surface.
☑️ Checklist before starting work
The old sensor is usually fixed in a plastic holder or glued. Carefully unplug the wiring connector (sometimes it may be soldered together, in which case soldering will be required) and remove the element. The new sensor is installed in the reverse order. It is important to ensure tight contact of the sensitive element with the surface that it must monitor.
Diagnostics of thermal sensor faults
How to understand that thermal sensor is faulty? The main diagnostic tool is a multimeter set to resistance measurement mode (Ohm). A working thermistor at room temperature (about +20...+25°C) should show a resistance in the range of 4-7 kOhm (the exact value depends on the model, for example, 5 kOhm or 10 kOhm). When cooling, the resistance should increase, and when heating, it should fall (for NTC type).
If the multimeter shows an open circuit (infinity) or a short circuit (zero), the sensor definitely requires replacement. Also, a sign of a malfunction may be the absence of a change in resistance readings when the temperature of the sensor changes (for example, if you hold it in your hand, the resistance should change).
| Symptom | Possible cause | Action |
|---|---|---|
| The refrigerator does not turn off | The sensor “lies”, showing a high temperature | Checking the resistance, replacing the sensor |
| Food freezes in the refrigerator compartment | The sensor shows the temperature higher than the real one | Replacing the temperature sensor |
| Error code on the display (for example, F4, F5) | Open circuit of the sensor | Checking contacts and wire integrity |
| Frequent switching on and shutdown | Unstable contact or oxidation | Cleaning contacts, replacing the sensor |
Typical mistakes during self-repair
One of the most common mistakes is ignoring the type of sensor. Users often install sensors with a different nominal resistance, which leads to incorrect operation of the refrigerator: it either will not gain cold or will wear out. Always check the markings or technical specifications with the original.
Another mistake is poor insulation of connections. In conditions of high humidity inside the refrigerator, any twist or solder joint without high-quality heat shrink will quickly oxidize. Use special waterproof materials to insulate electrical connections.
⚠️ Attention: Do not use regular tape or glue that is not intended for low temperatures to attach sensors. In the cold, such materials lose their properties, and the sensor will fall off the wall, after which it will begin to show the temperature of the air in the chamber, and not the evaporator wall, which will disrupt the operating mode.
Also, do not neglect checking the wiring. Often, replacing a working sensor does not work because the wire in the harness is broken or the contact group on the control board has oxidized. Diagnostics must be comprehensive.
Frequently asked questions (FAQ)
Is it possible to temporarily short-circuit the sensor to does the refrigerator work?
Technically, shorting the sensor (or installing a resistor of a certain value) can force the refrigerator to operate in constant cooling mode. However, this will lead to deep freezing of food in the refrigerator compartment and possible failure of the compressor due to continuous operation. This is not a solution to the problem, but only a temporary and risky measure.
Why does the Atlant refrigerator show a sensor error after defrosting?
If the error persists after defrosting, there may be moisture remaining in the sensor connector, causing a short circuit of the contacts. Allow the equipment to dry completely overnight. If the error does not disappear, it is likely that the sensor itself has failed or the wire is damaged.
Where to buy an original temperature sensor for Atlant?
It is better to purchase original spare parts from authorized service centers of the brand or specialized stores of spare parts for household appliances. When purchasing, pay attention to compatibility by catalog number, since visually identical sensors may have different resistance characteristics.
Does the location of the sensor affect energy consumption?
Yes, if the sensor is displaced from its regular place and does not fit tightly to the cooled surface, it will read the wrong temperature. This will force the compressor to work longer than necessary, which will directly increase energy consumption.