Two-chamber refrigerators of the brand Atlant are deservedly popular due to their reliability and simplicity of design. However, even the highest quality equipment breaks down over time, and one of the common causes of temperature violations is faulty equipment. This small device is responsible for turning the compressor on and off, maintaining the set temperature in the chambers. thermostat. This small device is responsible for turning the compressor on and off, maintaining the set temperature in the chambers.
If you notice that the refrigerator has stopped freezing or, conversely, the food in the main chamber has begun to freeze, and the compressor works without interruption or does not turn on at all, there is most likely a problem It lies in the thermostat. Independent replacing the thermostat is a very real task for a home craftsman who has a minimum set of tools and basic electrical skills.
In this article we will analyze in detail the process of diagnosing and replacing the temperature sensor, paying special attention to the nuances characteristic of two-chamber models. Atlant. A correctly performed replacement will extend the life of your refrigerator and avoid an expensive call to the repairman.
Operating principle and signs of malfunction of the thermostat
The thermostat, or thermostat, is an electromechanical device that responds to changes in temperature in the evaporator. Inside the housing is a bellows tube filled with gas or liquid, which expands or contracts depending on heat. When the temperature reaches a preset threshold, the contacts open and the compressor stops.
Understanding the operating principle helps to quickly diagnose a breakdown. In two-compartment models Atlant the thermostat is usually installed in the main compartment or at the top of the freezer, depending on the defrosting system. The most common symptoms of failure are:
- 🔌 The compressor runs continuously without turning off, and the refrigerator is humming loudly.
- ❄️ The unit does not turn on at all, although there is voltage in the network and the light is on.
- 🌡️ The main chamber is too cold (food freezes) or too warm, regardless of the position of the regulator knob.
⚠️ Attention: If the compressor runs without stopping, this can lead to overheating and failure. If such a symptom is detected, it is recommended to temporarily disconnect the refrigerator from the network until repairs are carried out.
Sometimes users confuse a thermostat breakdown with a freon leak or a malfunction of the start relay. However, if the motor-compressor hums but does not start, or operates jerkily, the problem is most likely in another unit. For accurate diagnostics, it is often necessary to ring the contacts with a multimeter, having first reached them.
Preparation for repair: tools and safety
Before you start disassembling the refrigerator Atlantit is necessary to ensure safe working conditions. The main rule of any repair of household appliances is complete disconnection from the power supply. Even if you plan to work only with mechanical components, the risk of electric shock if the wire insulation is accidentally damaged is too great.
To replace the thermostat you will need a minimum set of tools. In most cases, a regular Phillips and flat-head screwdriver, as well as pliers, are sufficient. To check the functionality of the old and new sensor, it is highly advisable to have on hand multimeter or a tester.
☑️ Preparation for repair
It is also worth purchasing a new thermostat in advance. For two-chamber refrigerators Atlant the TAM or K-59 series models are most often used, but the exact marking depends on the year of manufacture and the specific modification. It is best to remove the old sensor before purchasing and select an analogue with the same capillary tube length and contact arrangement.
Do not forget to prepare a container for collecting condensate, if defrosting is required, and a clean rag for wiping the internal surfaces. Working with electrical appliances requires care, so make sure that the repair area is well lit.
Removing the old thermostat in a two-chamber model
The dismantling process in two-chamber refrigerators Atlant has its own characteristics that distinguish them from their single-chamber counterparts. In most modern models, access to the thermostat is through the top panel in the refrigerator compartment or through a decorative trim.
First you need to clear access to the unit. Remove any shelves or drawers that might be in the way. Locate the plastic casing that hides the thermostat. It is usually secured with latches or screws. Carefully pry up the plastic with a flat screwdriver, being careful not to damage the fragile fasteners.
- 🔧 Unscrew the screws securing the decorative panel or casing.
- 🧊 Carefully remove the temperature control knob by pulling it towards you (sometimes it fits tightly).
- 💡 Remove the lamp shade, if it is located nearby, so as not to damage it during operation.
After removing the protective casing, you will see the thermostat itself and the wires suitable for it. Before disconnecting them, it is strongly recommended to photograph the connection diagram or sketch the color coding of the wires. This will eliminate errors during assembly.
Next you need to disconnect the bellows tube from the evaporator. It can be fixed in a special hole in the chamber wall or pressed with a metal plate. Proceed with caution: the tube is thin and easily damaged. If the thermostat is mounted on a metal plate, unscrew it.
⚠️ Attention: The bellows tube of the new thermostat should not have any creases or damage. When installing, avoid sharp bends, as this will break the tightness of the system and the device will not work correctly.
Nuances of location in different models
In some Atlant models with the No Frost system, the thermostat may be hidden behind the back wall of the refrigerator compartment, which requires partial disassembly of the internal volume. In classic models with a weeping evaporator, access is usually easier and is carried out from the front.
Installation of a new temperature sensor and connection diagram
Installation of a new one thermostat is carried out in the reverse order of dismantling. First of all, secure the bellows tube in its original location. It must be in close contact with the surface of the evaporator or enter the hole intended for it in the chamber wall to a depth specified in the technical documentation (usually several centimeters).
Fix the thermostat housing on a metal plate or in the seat of a plastic casing. Make sure it fits securely and does not wobble. The vibration of a running compressor should not be transmitted to the sensor, as this can cause false alarms.
Now the most important part is connecting the wires. Use a photo or diagram you took earlier. Typically, three or four wires go to the thermostat:
1. Wire from the network (phase).
2. Wire to the compressor.
3. Wire to the lighting lamp (in some circuits).
4. Grounding (yellow-green wire, not always present in older models).
Connect the wires to the corresponding terminals of the new device. If the numbering of contacts on the new thermostat differs from the old one, be guided by the color of the wires and their purpose. After connecting, check the reliability of the connections: the wires should not dangle or spark.
Reinstall the plastic casing, adjustment knob and lamp shade. Make sure all latches are in place. Do not use excessive force when snapping the plastic so as not to break the fasteners.
Compatibility table and thermostat markings
When purchasing a spare part, it is important to consider not only the brand of the refrigerator, but also the specific series of the thermostat. For two-chamber Atlantov certain models are most often suitable, but there are exceptions. Below is a table with the main characteristics of popular thermostats.
| Thermostat marking | Refrigerator type | Capillary length | Contact features |
|---|---|---|---|
| TAM-133 | Single-chamber / Double-chamber | 0.75 m | 3 contacts, standard |
| K-59 L1950 | Two-chamber (Atlant, Indesit) | 2.5 m | 3 contacts, long capillary |
| TAM-145 | Two-chamber (No Frost) | 1.3 m | Specific fasteners |
| K-57 L1450 | Single chamber / Freezer | 2.0 m | 2 contacts |
Pay attention to the length of the capillary tube. If you bought a thermostat with a longer tube, you can carefully twist it into a ring and secure it inside the housing, but do not cut it under any circumstances. It is impossible to extend a short tube, so it is better to take it with a reserve.
The temperature characteristic is also important. Some ranges are used for the refrigerator compartment, and others for the freezer. Installing an unsuitable sensor will result in the products either spoiling or freezing into a “porridge.”
First launch and performance check
After completion of assembly and visual inspection, you can begin testing. Plug in the refrigerator. In the first minutes of work, listen carefully to the sounds. There should be a characteristic click of the thermostat and the compressor should start.
Let the unit run idle (without products) for 2-3 hours. During this time, it must reach the required temperature and turn off. If the compressor runs continuously for more than 40 minutes and does not turn off, the thermostat may not sense the cold or the capillary tube is not installed correctly.
- 🕒 Check the cyclic operation: turning on and off should occur regularly.
- 🌡️ Make sure that excess ice does not form in the refrigerator compartment.
- 🔊 Listen to the operation: there should be no extraneous knocking or humming.
⚠️ Attention: If, after replacing the thermostat, the refrigerator continues to operate incorrectly (does not turn off or turn on), the problem may not be in the new sensor, but in a freon leak or a malfunction of the compressor itself. In this case, more in-depth diagnostics are required.
Do not load the chamber with products immediately. Let the technique get into mode. Only after you make sure that the temperature has stabilized and the on/off cycles are normal, you can add food.
Frequently asked questions (FAQ)
Is it possible to repair an old thermostat rather than changing it?
At home, repairing a thermostat is practically impossible and impractical. This is a sealed assembly and if it is damaged, it will lose calibration. In addition, the cost of a new sensor is low, so replacement is the only reasonable solution.
Why does the new thermostat click, but the compressor does not start?
If there is a click, then the contacts are closed. The problem may be in the compressor start relay, in the motor itself (turn-to-turn short circuit), or in an open power circuit. It is necessary to test the circuit with a multimeter, starting from the socket to the compressor terminals.
Is it necessary to defrost the refrigerator before replacing the thermostat?
Full defrosting is not always necessary if access to the thermostat is from above. However, if access to the rear wall is required or there is a risk of moisture getting on the electrical contacts, it is better to defrost the unit in advance and wipe the chamber dry.
How to understand that the capillary tube is installed incorrectly?
If the tube is not immersed deep enough in the evaporator or does not have contact with it, the thermostat will “think” that the chamber is warmer than it actually is in fact. This will cause the compressor to work longer than necessary, causing food to freeze.
Where can I find the exact connection diagram for my Atlant model?
The electrical circuit diagram is usually located on the back wall of the refrigerator (in the form of a sticker) or in the operating instructions. You can also find documentation for a specific model number on the manufacturer's official website or in specialized forums.