Where the thermostat is located in the refrigerator: search, check and replacement

The thermostat (or thermostat) is the “brain” of the refrigerator, which controls the temperature in the chambers and controls the operation of the compressor. When you notice that the refrigerator has stopped freezing, runs nonstop, or, conversely, turns on too rarely, the problem often lies in this particular unit. But before you run to the workshop, you should check its condition yourself. The main question that arises among owners: where is the thermostat in the refrigerator and how to get to it?

The location of the thermostat depends on the model, type of cooling system (drip, No Frost) and even the year of manufacture of the equipment. In old Soviet refrigerators (Minsk, Biryusa), the thermostat is usually visible to the naked eye, but in modern devices (LG, Samsung) it can be hidden under decorative panels. In this article we will analyze typical installation locations, show photos with disassembly and explain how to safely get to the part without the risk of damaging the refrigerator.

Why do you need a thermostat and how does it work

Thermoregulator is an electromechanical (or electronic) device that performs three key functions:

• 🔹 Temperature control: a sensor inside the thermostat measures the degree of cooling in the chamber and compares it with a user-specified value.
• 🔹 Compressor control: when the temperature rises, it closes the contacts, including the motor; when the norm is reached, it opens, turning off the cooling.
• 🔹 Overheat protection: in some models, the thermostat also turns off the system at critical values, preventing compressor breakdown.

In refrigerators two types of thermostats are used:

• 🔘 Mechanical (based on a gas bellows): common in budget and older models (Atlant, Nord). They have an adjustment knob with numbers from 1 to 7.
• 🔘 Electronic (with thermistors): installed in premium class equipment (Liebert, Bosch). They are controlled by buttons or a touch panel.

If the thermostat breaks down, the refrigerator either stops turning on at allor works continuously without turning off. In the first case, a broken circuit is to blame, in the second, “sticking” of the contacts. Before replacing a part, it is important to make sure that the problem is in it, and not in the compressor or freon leak.

Typical thermostat locations in refrigerators of different brands

Manufacturers place thermostats in three main areas: inside the refrigerator compartment, behind the outer panel or in the freezer compartment The exact location depends on the design of the model. Below are diagrams for popular brands.

In refrigerators with a system No Frost the thermostat is usually installed in the freezer compartment or behind the back wall, since cooling occurs through a common evaporator. In models with drip system (crying evaporator), the part is often located in the refrigerator compartment, next to the lighting lamp.

Where to look for the thermostat in two-chamber refrigerators?

In two-chamber appliances (Biryusa, Pozis), two thermostats are often installed: one for the refrigerator compartment (inside, under the lid), the second for the freezer (behind the back panel or in the upper compartment). Sometimes both thermostats are combined into a single control unit located outside (for example, in models Samsung RL-33).

How to find a thermostat: step-by-step instructions with photos

Before disassembling the refrigerator, unplug it and remove it all products. Prepare the tools:

• ⚒️ Phillips and flat screwdriver
• 🔧 Wrench (for some models)
• 📸 Phone for photographing the process (useful for reassembly)
• 🧤 Gloves (to avoid leaving fingerprints on the plastic)

Next follow the algorithm:

1. Inspect the refrigerator compartment. Look for a plastic cover measuring 10x15 cm, usually located next to the temperature control knob or lamp. In models Atlant it may be. be secured with one screw in the center.
2. Remove the cover. Pry it off with a flat screwdriver (be careful not to break the latches) Under the lid you will see a thermostat - a plastic box with a thin tube coming out of it. (capillary).
3. Check the fastening. The thermostat can be screwed to the body or fixed with a plastic holder. Sometimes you have to remove the top shelf for access. Stinol And Indesit Sometimes you have to remove the top shelf to gain access.
4. Disconnect the wires. Take a photo of the connection diagram before removing the terminals! Mechanical thermostats usually have 3-4 wires: phase, neutral, ground and wire to. compressor.

Unplug the refrigerator from the outlet|

Take a photo of the location of the wires|

Line the terminals with a marker (if there are a lot of wires)|

Check availability of a spare part (if replacement is planned)-->

In refrigerators with electronic control (LG, Samsung), the thermostat may be part of the board. In this case, its replacement requires soldering work or a complete replacement of the unit. If you are not confident in your skills, it is better to contact a specialist.

⚠️ Attention: In models with system No Frost are often installed thermistors instead of classic thermostats. They look like small black or white sensors on wires and are attached to the evaporator. They are checked with a multimeter in resistance mode.

Signs of a thermostat malfunction: when a replacement is needed

Before you get into the structure of the refrigerator, make sure that the problem is really in the thermostat. The following symptoms indicate a malfunction:

• ❄️ Refrigerator not turns on (the compressor is silent, the light is on).
• 🔥 The compressor works without stopping, but the temperature in the chambers does not drop.
• ❓ The display shows error (for example, E1 or F2 in Bosch).
• 🌡️ Temperature in the chambers jumps (either too cold, then too warm).
• 🔌 When you turn the thermostat knob no click (characteristic sound of contacts closing).

To finally confirm the diagnosis, the thermostat needs to be checked with a multimeter:

1. Remove the part as described above.
2. Switch the multimeter to the mode continuity (or resistance measurement).
3. Touch the contacts with the probes 3 i 4 (usually they are labeled). At room temperature, the resistance should be 0 Ohm (contacts closed).
4. Immerse the capillary tube of the thermostat in ice for 1-2 minutes. The resistance should become infinite (contacts open).

If during cooling the contacts do not open or the resistance does not change, the thermostat is faulty. It is also worth checking the wires for oxidation or breakage, especially if the refrigerator is operated in a damp room.

How to replace a thermostat yourself: tips and errors

If you have confirmed that the thermostat is faulty, you can replace it yourself. The main thing is to choose analog for the refrigerator model. The number of the original part is usually indicated on its body (for example, K59-L1437 for Atlant or 25T65 for Indesit). When buying a new thermostat, pay attention to:

• 🔧 Type fastening (screws, latches, terminals).
• 📏 Length of the capillary tube (it must coincide with the old one).
• 🔌 Connection diagram (number and location of contacts).

Replacement process:

1. Disconnect the old thermostat, having previously photographed the connection of the wires.
2. Install the new thermostat in place, securing it in the same way as the old one was secured.
3. Connect the wires according to the diagram. In mechanical thermostats, the order of connection is usually not important (the main thing is not to confuse phase and zero), and in electronic thermostats - strictly by color.
4. Make sure that the capillary tube is not pinched and does not touch hot parts (for example, a compressor).
5. Turn on the refrigerator and check the operation for 1-2 hours.

⚠️ Attention: In refrigerators Samsung and LG with electronic control, replacing the thermostat may require reflashing the board. Without this, the new sensor will not be recognized by the system. Check this point with the seller of the spare part.

Typical errors when replacing:

• 🚫 Messed up wires: can lead to a short circuit or failure of the compressor.
• 🚫 Damaged capillary tube: if it is bent, the thermostat will show the wrong temperature.
• 🚫 Loose fastening: vibration from the compressor can throw off the settings or damage the contacts.

Frequently asked questions about thermostats in refrigerators

Let's look at the most controversial issues that owners have when diagnosing and replacing thermostats.

Can the thermostat be repaired or just replaced?

Mechanical thermostats cannot be repaired —they are only replaced. In electronic devices, it is sometimes possible to replace individual elements (for example, a thermistor), but this requires soldering skills and device circuitry. In 90% of cases, it is easier and cheaper to buy a new thermostat.

Which thermostat is suitable for a refrigerator Atlant two-chamber?

For most models Atlant (for example, MXM-170, MXM-184) suitable thermostats K59 (for example, K59-L1437 or K59-L1940). The main thing is the coincidence in the number of contacts and the length of the capillary. The freezer may require a separate thermostat. data-i="235">Why does the new thermostat not work after installation? TAM-133.

Why doesn't the new thermostat work after installation?

There are several reasons:

• ❌ Incorrect wire connection (check the diagram).
• ❌ The capillary tube touches hot parts (for example, a condenser).
• ❌ Incompatibility of the model (even if the thermostats are similar in appearance, their characteristics may differ).
• ❌ In electronic refrigerators there is no initialization (reset of settings is required).

If everything is connected correctly, but the refrigerator does not freeze, check the compressor and the presence of freon.

How much does it cost to replace the thermostat in service center?

The cost depends on the model of the refrigerator and the type of thermostat:

• 💰 Mechanical thermostat: 1,500–3,000 ₽ (with work).
• 💰 Electronic thermostat/sensor: 2,500–5,000 ₽.
• 💰 Replacement of the control board (if the thermostat is integrated): 4,000–8,000 ₽.

The part itself will cost 500–2,000 ₽ depending on the brand.

Is it possible to do without thermostat by connecting the compressor directly?

Technically possible, but highly not recommended. Without a thermostat, the compressor will operate continuously, which will lead to:

• 🔥 Overheating and motor breakdown.
• ❄️ Icing of the evaporator (in models without No Frost).
• 💡 Increased energy consumption.

Such a connection is only permissible for a temporary check of the compressor's performance (no more than 10–15 minutes!).

Tips for extending the life of the thermostat

To ensure that the thermostat lasted longer, follow simple rules:

• 🧊 Do not install in the refrigerator too low temperature (optimally: +4…+5°C in the refrigerator, -18°C in the freezer).
• 🚪 Do not keep the door open for a long time - this leads to frequent starts of the compressor and wear of the thermostat contacts.
• 🔌 Use voltage stabilizerif in your network frequent surges.
• 🧹 Defrost the refrigerator regularly (even with No Frost) - ice on evaporator may damage the capillary tube of the thermostat.

In mechanical thermostats over time gas dries out in the bellows or contacts oxidize. To slow down this process, once a year you can remove the thermostat and clean the contacts with alcohol. In electronic models, the main problem is board overheating, so make sure that the ventilation holes of the refrigerator are not closed.

Now you know where is the thermostat in the refrigerator how to check it. If problems remain after replacement, it may be due to other components: the compressor, start-up relay, or refrigerant leak. In such cases, it is better to contact a professional.