Modern two-chamber refrigerators Atlant present are complex electromechanical systems where each element plays a critical role. When owners are faced with the problem of insufficient cooling or, conversely, freezing of food, the temperature sensor becomes the first suspicious element. Understanding exactly where it is located is the key to independently diagnosing faults without calling a technician.
The exact location of thermostat or electronic sensor directly depends on the type of defrosting system installed in your model. In some cases this is a mechanical device with a long capillary tube, in others it is a compact electronic component built into the evaporator. It is important to understand these nuances, since incorrect installation or damage to the sensor during installation can lead to failure of the compressor.
In this article we will take a detailed look at the design features of various series of refrigerators Atlantso that you can determine exactly where to look for the sensor in your particular case. We will analyze the differences between models with a drip system and technology No Frost, and also pay attention to the nuances that are often overlooked during the initial inspection of equipment.
Differences in temperature control systems in Atlant refrigerators
Before you begin your search, you must Understand clearly what type of temperature control is used in your unit. Two-chamber refrigerators Atlant are traditionally divided into two large groups: classic models with a crying defrosting system and modern modifications with the system No Frost. In the first case, a mechanical thermostat is responsible for control, in the second - a complex combination of electronic sensors and timers.
Mechanical thermostat is a sealed capsule with gas or liquid connected to a contact group through a capillary tube. The principle of its operation is based on the physical expansion or contraction of the working fluid depending on the ambient temperature. These are reliable, but less accurate devices compared to their electronic counterparts.
- 🔹 Mechanical models are controlled by a rotary knob inside the chamber, often with numbers from 1 to 7.
- 🔹 Electronic systems use digital displays on the door or hidden panels controls.
- 🔹 In models No Frost sensors are built directly into the evaporator and blower system.
⚠️ Attention: An attempt to replace a mechanical thermostat with an electronic analogue without altering the control circuit will lead to incorrect operation of the compressor and possible burnout of the start relay.
Electronic sensors, or thermistors, change their electrical resistance when the temperature changes. The signal from them is sent to control module, which makes the decision to turn the compressor on or off. Such systems make it possible to maintain temperature with an accuracy of 0.5 degrees, which is impossible for mechanics. However, their diagnosis requires a multimeter and an understanding of the principles of operation of electrical circuits.
Thermostat location in models with a weeping system
In classic two-chamber refrigerators Atlant with a weeping defrost system (where on the back wall of the refrigerator frost forms in the chamber, which then melts), the temperature sensor is most often represented by a mechanical thermostat. Its main task is to monitor the air temperature inside the refrigerator compartment. You can find it by paying attention to the cold control knob located inside the main compartment.
The thermostat body itself is usually hidden behind a plastic cover or directly in the wall of the refrigerator, immediately under the handle. If you carefully remove the plastic casing of the temperature controller, you will see a metal box with suitable wires. From this box comes a thin capillary tubewhich is a sensitive element of the system.
The capillary tube can be laid in several ways depending on the specific model Atlant:
- 🧊 It is mounted in a channel inside the wall of the fridge compartment (the most common option).
- 🧊 Secured with special clamps on the back wall inside the chamber (found in older models).
- 🧊 In rare cases, it passes through the door seal if the sensor reacts to the evaporator temperature.
It is important to understand that capillary The tube is very thin and fragile. If handled carelessly during defrosting or cleaning, it can be damaged, resulting in leakage of working gas and thermostat failure. In such cases, a complete replacement of the unit is required, since repairing the sealed system in a domestic environment is impossible.
Sensors in the No Frost system: where to look and how they are arranged
In refrigerators Atlantequipped with the system No Frost (or Full No Frost), the situation is radically different. There is no one large thermostat knob in the refrigerator compartment, and temperature control is carried out by several electronic sensors. The main sensor responsible for the cooling cycle is usually located in the cold air circulation zone.
Most often in two-chamber models Atlant c No Frost the main air temperature sensor is located in the upper part of the fridge compartment, often hidden behind a decorative panel or built into air duct The second important sensor is responsible for monitoring the defrost of the evaporator and is located directly on the evaporator itself, which is hidden behind the back wall of the freezer.
To access the defrost sensor in the freezer, you will need to perform a number of actions:
- Completely defrost the refrigerator (at least 10-12 hours).
- Remove all shelves and drawers of the freezer compartment.
- Remove the rear plastic panel covering the evaporator.
- Find the sensor, which is usually attached to the aluminum fins of the evaporator.
⚠️ Attention: Removing the rear panel in the freezer camera requires caution. Plastic becomes brittle after prolonged use, and fastening elements can be hidden under a layer of ice or thermal insulation.
Electronic sensors in the system No Frost are small elements, often filled with sealant or placed in a metal sleeve. They are connected to the control board via connectors. Unlike mechanics, they do not have moving parts, but are subject to oxidation of contacts and changes in resistance over time.
Instructions for safe access to the sensor
If you decide to inspect or replace the temperature sensor yourself, you must strictly follow safety precautions. Working with electrical appliances and refrigerants requires care. The first step should always be to completely disconnect the refrigerator Atlant from the power supply. It is not enough to simply turn off the light or pause it - you need to unplug the plug from the socket.
The process of accessing the insides of the refrigerator requires the preparation of tools. You will need screwdrivers (Phillips and flat head), possibly hex keys to remove the panels, and a container to catch the melt water. If we are talking about a mechanical thermostat with a capillary, make sure that you have access to the space behind the refrigerator.
☑️ Preparation for diagnosing the sensor
When removing plastic panels in the refrigerator or freezer, do not make sudden movements. The mounting clips may break and the plastic itself may crack. If the panel cannot be removed, check that all screws are removed and that there are no hidden latches around the perimeter. In some models Atlant the panels are additionally fixed with thermal insulation material, which must be carefully bent back.
After gaining access to the sensor, a visual inspection can tell a lot about its condition. Look for signs of corrosion on the contacts, melted wire insulation, or mechanical damage to the housing. If the sensor is electronic, check the reliability of the connection of the connector with the wiring.
Diagnostics and signs of a malfunction of the temperature sensor
How to understand that the temperature sensor in your refrigerator Atlant has failed? There are a number of characteristic symptoms that indicate problems with thermoregulation, and not with the compressor or refrigerant. The most obvious sign is a violation of the temperature regime when the engine is working properly.
Let's consider the main symptoms that should alert the owner:
- ❄️ The refrigerator works non-stop, the compressor hums constantly, but the temperature does not drop to normal.
- ❄️ The unit turns on extremely rarely, the food in the refrigerator compartment is warm, although the regulator is turned up to the maximum.
- ❄️ There is severe freezing of the back wall or, conversely, a complete absence of condensation (in crying models).
- ❄️ The freezer compartment works normally, but in refrigeration - temperature above +10°C.
For accurate diagnosis of an electronic sensor, multimeteris required. The sensor is removed and checked for resistance. When the temperature changes (for example, if you hold the sensor in your hand or cool it), the resistance should change smoothly. If the device shows an open circuit (infinity) or a short circuit (zero), the sensor is faulty.
Is it possible to temporarily dispense with the sensor?
Theoretically, the mechanical thermostat can be closed so that the compressor runs constantly. However, this will lead to deep freezing of food, freezing of the chamber and possible failure of the compressor due to overload. This solution is only for emergency cases for a couple of hours.
In mechanical thermostats, checking is more difficult. The elimination method is often used: if there is no click when turning the knob, and contact testing shows no response, the thermostat must be replaced. It is also important to check the integrity of the capillary tube - any creases or traces of oil at its end indicate depressurization.
Comparative table of types of sensors in Atlant refrigerators
For the convenience of systematizing information, we will provide a comparison of the main characteristics of sensors used in various lines of two-chamber refrigerators Atlant. This will help you quickly identify the type of device in your equipment.
| Characteristics | Mechanical thermostat | Electronic sensor (Thermistor) | Defrost sensor (No Frost) |
|---|---|---|---|
| Principle of operation | Gas/liquid expansion | Change in resistance | Change in resistance |
| Location | Inside the chamber, under the handle | Air duct or chamber wall | On the evaporator (behind the wall) |
| Accuracy | Low (±2-3°C) | High (±0.5°C) | High |
| Difficulty of replacement | Medium (requires access to the capillary) | Low (remove and install) | High (disassembling the freezer) |
As can be seen from the table, electronic systems require less physical effort when replacing the element itself, but their diagnosis is more difficult. Mechanical thermostats are more cumbersome due to the capillary tube, but their operating principle is clearer for visual inspection.
Nuances of replacement and calibration after installation
After a new temperature sensor is installed in the refrigerator Atlant, the system may require time to stabilize. In mechanical models, it is often necessary to adjust the screws on the thermostat itself (they are closed with a sealing cover) to adjust the moment the compressor turns on and off.
In electronic models with a display, after replacing the sensor, errors may need to be reset. To do this, the refrigerator often needs to be left unplugged for 15-20 minutes. This will allow the control module to reboot and read new readings from the installed sensor. If the error persists, then the problem is not in the sensor, but in the wiring or the control board itself.
⚠️ Attention: Technical characteristics and location of components may vary slightly depending on the year of manufacture and the specific modification of the refrigerator. Always check the technical documentation or diagram if it is available for your model Atlant.
Do not forget that correct installation is not only about connecting the wires. On models with a capillary tube, it is critical that the sensing tube is correctly positioned in its seat. If it does not touch the entire length of the chamber wall or is twisted, the refrigerator will “lie” about the temperature, which will lead to frequent starts of the compressor.
Frequently asked questions (FAQ)
Is it possible to use a universal thermostat for the Atlant refrigerator?
Yes, there are universal mechanical thermostats (for example, the TAM or K-59 series), which fit many models. However, the length of the capillary tube and the mounting thread must match. For electronic systems, versatility is limited - you need an exact match of resistance.
Why does the refrigerator not turn off after replacing the sensor?
Most likely, the new sensor has different resistance characteristics, or the capillary tube of the mechanical thermostat does not fit tightly enough to the evaporator wall. It is also possible that the newest element is defective or the compressor start relay is faulty.
Where is the second sensor located in two-compressor Atlant models?
In two-compressor models, each cooling circuit (for the refrigerator and freezer chambers) has its own independent temperature sensor. They are located similarly to single-circuit ones, but in chambers: one in the refrigerator compartment, the second in the freezer.
How to check the serviceability of a sensor without a multimeter?
It is impossible to accurately check the electronics without instruments. A mechanical thermostat can be tested by placing the sensing tube in cold water with ice. If after a few minutes you do not hear the click of the contacts opening, the thermostat is faulty.