We disassemble the refrigerator thermostat: a step-by-step guide with photos and advice from experts

The thermostat (or thermostat) is the “brain” of the refrigerator, responsible for maintaining the set temperature. When it fails, the compressor either works without stopping or does not turn on at all, which leads to food spoilage or freezing. You can disassemble the thermostat yourself in 20–40 minutes if you know the design of the device and have a minimum set of tools on hand.

In this article we will look in detail at how to dismantle the thermostat from refrigerators Atlant, Indesit, Samsung and other popular brands, what tools will be needed, and what to look for during reassembly. You will also learn how to check the thermostat for functionality without a multimeter and when repairing it is impossible.

⚠️ Warning: If your refrigerator is under warranty, disassembling the thermostat will void it. In models with electronic control (for example, LG No Frost or Bosch VitaFresh), the thermostat is often integrated into the board - its replacement requires soldering work.

1. Signs of a malfunctioning thermostat

Before disassembling the refrigerator, make sure that the problem is in the thermostat. Here are the key symptoms of its breakdown:

• 🔴 The compressor does not turn on, although the light inside is on (there is power).
• ❄️ The refrigerator freezes too much - the food is covered with ice, even if the temperature regulator is set to minimum.
• 🔄 The compressor works non-stop, not reacting to a change in the position of the thermostat knob.
• 💥 Clicks are heard inside the refrigerator body (relay contacts may break).
• 🌡️ The temperature in the chambers does not correspond to the set one (for example, at +5°C on the scale it is actually +12°C).

🔍 Diagnostic test: Turn the knob thermostat from position “0” (off) to “Max”. If the compressor does not start within 5-10 minutes, the thermostat is faulty. In models with an electronic display (for example, Samsung RB30J3000), the error may be displayed as a code E01 or E02.

⚠️ Attention: Similar symptoms are given by a malfunction of the compressor start relay or freon leak. If after replacing the thermostat the problem remains, check these components.

2. Tools and preparation for disassembly

To disassemble the thermostat you will need:

• 🔧 Phillips and flathead screwdrivers (the size depends on the model, usually PH2 i 3–4 mm).
• 📸 Phone or camera - to photograph the location of the wires before disconnecting.
• 🧲 Magnet or marker - for marking the wires (especially if there are more than 3).
• 🔍 Flashlight - to illuminate hard-to-reach places (in some refrigerators the thermostat is hidden behind the panel).
• 🛠️ Pliers or wire cutters - for removing plastic latches (in models Indesit or Ariston).

Preparation of the workplace:

1. Unplug the refrigerator and leave for 10-15 minutes (capacitors can retain charge).
2. Remove all food and shelves from the compartment where the thermostat is located (usually in the upper part of the refrigerator compartment).
3. If the refrigerator is No Frost, seal the vents with tape to prevent dust from entering.

💡 Tip: On models Atlant and Biryusa the thermostat is often mounted with screws under a decorative trim. Samsung or LG it can be hidden behind the back wall of the freezer.

3. Where is the thermostat located in the refrigerator?

The location of the thermostat depends on the model and type of cooling system. Here are the typical options:

🔎 How to find the thermostat:

1. Inspect the inside of the refrigerator compartment - look for a plastic box with a temperature control knob.
2. If there is no knob, check the back wall (in models No Frost the thermostat can be hidden under the panel with a fan).
3. In refrigerators Side-by-Side (for example, Samsung RS-62 R5001) there are two thermostats - separately for the refrigerator and freezer compartments.

⚠️ Attention: In refrigerators with the system Frost Free (for example, Bosch KAN58A55), the thermostat is often combined with a defrost timer. Replacing it requires precise adjustment of the new device.

What to do if the thermostat is not found?

In some models (for example, Liebert or Electrolux with inverter compressors), the thermostat is replaced with a temperature sensor built into the board. In this case, repair is possible only at a service center.

4. thermostat

Let's consider a universal algorithm using the example of a two-chamber refrigerator Indesit C 132 G (similarly for Atlant, Stinol, Nord).

Step 1: Removing the protective panel

1. Unscrew the screws holding the top plastic panel (usually 2-3 screws for the Phillips screwdriver).

2. Carefully remove the panel by pulling it towards you. In some models, it is secured with latches - pry it off with a flat screwdriver.

3. Under the panel you will see a thermostat - a plastic box with a tube (bellows) and terminals for wires.

Step 2: Disconnecting the wires

1. Take a photo of the location of the wires or mark them with a marker. Typical pinout:

• 🔌 Orange/red - power from the compressor.
• 🔌 Brown/black —ground.
• 🔌 Yellow/white —signal from the temperature sensor.

2. Disconnect the wires by pulling the connectors (do not pull them yourself). wires!). In older models (for example ZIL-63) screw terminals may be used - they need to be unscrewed.

Step 3: Removing the thermostat

1. (usually 2 screws).

2. Carefully pull out the thermostat along with bellows tube (do not bend it - this may lead to gas leakage inside).

3. If the tube is secured to the evaporator with a clamp - loosen it with pliers.

📌 Important: In refrigerators No Frost the thermostat can be soldered to the board. In this case, to replace it you will need a 40-60 W soldering iron and solder.

Step 4: Disassembling the thermostat housing

1. Place the thermostat on the table and remove the plastic cover by prying it around the perimeter with a screwdriver.

2. Inside you will see:

• 🔘 Contact group (relay).
• 📏 Spring with an adjusting screw (responsible for sensitivity).
• 🧊 Bellows (corrugated tube with gas).

3. Use an eraser or alcohol to clean contacts. If the contacts are burnt, they can be cleaned with fine sandpaper (P1000).

⚠️ Attention: Do not touch the bellows with your hands - grease marks can interfere with its thermal conductivity. If the tube is damaged (for example, bent), the thermostat must be replaced.

5. How to check the thermostat for functionality

There are three diagnostic methods:

Method 1: Testing with a multimeter

1. Set the multimeter to resistance test mode (200 Ohm).

2. Connect the probes to the terminals 3 and 4 (usually the compressor contacts). At room temperature, the resistance should be 0 Ohm (closed).

3. Place the thermostat in a container with ice water. After 2-3 minutes, the resistance should become ∞ (open). happened - the thermostat is faulty.

Method 2: Direct connection of the compressor

1. Disconnect the wires from the thermostat.

2. Connect the compressor wires directly (bypassing the thermostat). If the compressor starts, the problem is in the thermostat.

⚠️ Attention: This method only works for refrigerators with mechanical control! In electronic models (Samsung Digital Inverter), such a connection can burn the board.

Method 3: Visual inspection

Signs of malfunction visible without devices:

• 🔥 Burnt or melted contacts.
• 💨 Blistering or cracks in the bellows tube.
• 🔊 Extraneous noise (clattering parts inside the case).
• 🧲 Absence click when turning the adjustment knob.

📹 Video instructions: On YouTube there are videos on checking thermostats for specific models (for example, search for “checking the thermostat Indesit C 16 multimeter").

6. Typical mistakes during disassembly and how to avoid them

Even experienced technicians sometimes make mistakes that lead to repeated breakdowns. Here are the most common ones:

• 🔌 Mixed up wires: If you connect the wires incorrectly, the compressor may burn out!
• 🛠️ Tightening the screws too much: This can damage the thermostat housing or bellows tube.
• 🧊 Bellows bend: The tube must lie freely, without sharp bends. Bend radius - at least 5. see
• 🔥 Using a soldering iron without flux: When soldering wires to the board, use rosin or flux LTI-120to avoid cold soldering.
• ❄️ Incorrect temperature setting: After replacing the thermostat, the handle must be set to the middle position (usually “3” on a scale from 1 to 7).

🔧 How to avoid mistakes:

1. Use original spare parts. For example, for Atlant a thermostat is suitable K-59, and for Indesit — Danfoss 077B6.
2. Before assembly, check the tightness of the system: turn on the refrigerator for 10 minutes and listen for any hissing. (a sign of freon leakage).
3. If after replacing the thermostat the refrigerator does not freeze, check compressor start relay it may burn out from a power surge.

⚠️ Attention: In refrigerators with the system No Frost After replacing the thermostat, you may need reboot the control board. To do this, disconnect the refrigerator from the power supply for 5-10 minutes.

7. impossible

Not all thermostat breakdowns can be repaired yourself. Here are cases when replacement or the help of a specialist is required:

• 💥 Depressurization of the bellows: If the tube loses its seal, gas escapes and the thermostat stops responding to temperature.
• 🔥 Burnout of the contact group: If the contacts are so melted that they cannot be cleaned, a new thermostat is needed.
• 🤖 Failure of the electronic thermostat: In models Samsung or LG with a display, the thermostat is integrated into the board. Its replacement requires replacement. programming.
• ⚡ Short circuit: If, when checking with a multimeter, the resistance between any terminals 0 Ohm the device is short-circuited and must be disposed of.

💰 Replacement cost:

🔄 Alternative to repair: If the refrigerator is older than 10 years, replacing the thermostat may not be cost-effective. In this case, it is advisable to consider. purchasing a new refrigerator with an energy consumption class A+++ (for example, LG GA-B429 or Bosch KGE39XW25R).

8. Tips for choosing a new thermostat

When purchasing a replacement, pay attention on:

• 📏 Type fastenings: Thermostats are on screws or latches. For example, in Atlant screw fastening is used M4, and in Indesit - plastic clips.
• 🌡️ Temperature range: For freezers you need a thermostat with a range up to -24°C (for example, K-57), for refrigerators - up to +8°C (K-59).
• 🔌 Number of contacts: Most models have 4 terminals, but in No Frost can be 6 (additionally for the fan and defrost heating element).
• 🏭 Manufacturer: Original thermostats last longer. Samsung suitable Secop (Danfoss)for LG — Embraco.

🛒 Where to buy:

Spare parts can be found:

• At AliExpress (cheaper, but long wait).
• In spare parts stores for household appliances (for example, 220-volt, M-Video).
• Na Avito or Yule (used thermostats are cheaper, but the risk of buying a faulty device above).

⚠️ Attention: Before purchasing, check thermostat article number with the sticker on the back wall of the refrigerator or in the instructions. For example, Atlant MHM 1840-80 is suitable TAM-133-1M.

FAQ: Frequently asked questions about disassembling the thermostat

Is it possible to disassemble the thermostat without removing it from the refrigerator?

Technically it is possible, but it is not recommended. Firstly, access to the contacts will be limited, and secondly, there is a risk of damage. bellows tube. It is better to dismantle the thermostat completely and disassemble it on the table.

What to do if after replacing the thermostat the refrigerator does not turn on?

Check:

1. The correct connection of the wires (check the photo).
2. Voltage in socket (should be 220–230 V).
3. Compressor start relay - it could burn out during a power surge.

If everything is in order, but the refrigerator does not work, the new thermostat may be defective.

How to check thermostat without a multimeter?

1. Disconnect the thermostat from the wires.

2. Connect the wires going to the compressor (usually orange and brown).

3. Turn on the refrigerator. If the compressor starts, the problem is in the thermostat.

⚠️ Attention: This method only works for mechanical thermostats! This cannot be done in electronic models.

How much does it cost to replace a thermostat at a service center?

The cost depends on the region and model of the refrigerator:

• Mechanical thermostat: 1500–3000 rub. (with spare part).
• Electronic thermostat: 3500–6000 RUB (requires soldering and adjustment).
• A technician will visit your home: +500–1000 RUB..

In Moscow and St. Petersburg, prices are 10–15% higher than in the regions.

Is it possible to repair thermostat with your own hands?

Yes, but only in the following cases:

• Oxidation of contacts - they can be cleaned with an eraser or sandpaper.
• Weakening of the spring - it can be bent (but this is a temporary solution).
• Breakage of the wire - this can be done solder again.

If the problem is in the bellows or electronic board, repair is impossible, only replacement.