The thermostat (or thermostat) is the “brain” of the refrigerator, which controls the temperature in the chambers and controls the operation of the compressor. If your Atlant stops freezing, works without stopping, or, conversely, turns off too often, the problem with a 90% probability lies in this particular part. Replacing the thermostat is one of the few malfunctions that can be dealt with without calling a technician, saving 3-5 thousand rubles on the services of a service center.
In this article you will find step-by-step instructions with photos, detailed connection diagrams for popular models Atlant (including series HM, MHM, NRM), as well as tips on diagnostics and selection of spare parts. We will show you how to dismantle the old thermostat, connect a new one and check its operation - without special tools and the risk of damaging the refrigerator.
Important: if your refrigerator is under warranty, self-repair will void it. Check the deadlines in the documents before starting work.
Signs of a malfunctioning thermostat in the Atlant refrigerator
The thermostat fails gradually, and the first symptoms are often attributed to the “age” of the equipment or voltage drops. Here are the key signs that will indicate a breakdown of the temperature controller:
- 🔴 The refrigerator does not turn off — the compressor works around the clock, the walls are covered with ice, and the food freezes. This means that the thermostat is “stuck” in the “on” position and cannot break the circuit.
- 🟡 The compressor does not start —the refrigerator is completely “dead”, the light inside is on, but the motor does not respond to temperature changes. Perhaps the thermostat has broken the circuit and is not sending a start signal.
- 🔵 Unstable temperature —the chambers are either too warm (+10°C and above), or too cold (food freezes). The thermostat gives incorrect commands to the compressor.
- 🔊 Clicks without starting the engine —characteristic sounds of relay operation are heard, but the compressor does not start. This is a sign of broken contacts inside the thermostat.
If you observe at least one of these symptoms, First of all, check the thermostat. To do this, you do not need to disassemble the refrigerator - just perform a simple test with a multimeter (more on this below).
Rule out other causes! Before replacing the thermostat, make sure that:
- 🔌 There is voltage in the socket (check with another device).
- ❄️ The door closes tightly (perhaps the hinges are skewed or the seal is worn out).
- ⚡ The start-up protection relay is working properly (if the compressor does not start, the problem may be there).
How to check thermostat with a multimeter: step-by-step test
Diagnostics of the thermostat will take no more than 10 minutes. You will need multimeter (or a tester) and a screwdriver. Follow the instructions:
- Disconnect the refrigerator unplug and remove all products from the chamber where the thermostat is located (usually the top shelf of the freezer or refrigerator).
- Remove the protective cover thermostat. It is secured with latches or screws (depending on the model). Carefully pry it off with a flat screwdriver.
- Disconnect the wires from the thermostat terminals. Remember or take a photo of their location! Typical connection diagram:
- 🔘
Terminal 3- common contact (usually a brown or black wire). - 🔘
Terminal 4- contact for the compressor (orange, red or white). - 🔘
Terminal 6— contact for the light bulb (if any).
- 🔘
3 i 4.Test results:
- 🟢 The circuit is closed (sound signal or resistance ~0 Ohm) —the thermostat is working. The problem may be in the compressor or relay.
- 🔴 The circuit is open (no signal, resistance ∞) —the thermostat is faulty and requires replacement.
Additional test: If the circuit is open, carefully turn the thermostat knob to the “Max” or “6–7” position. A working thermostat should close its contacts with a characteristic click. If this does not happen, the part needs to be replaced.
Choosing a new thermostat for the Atlant refrigerator
Thermostats for Atlant differ by model and type of refrigerant and temperature range. The wrong choice will lead to unstable operation of the refrigerator! Here's how to choose a spare part:
1. Determine the thermostat model. It is indicated on the body of the old part (for example, K-59, TAM-133, Danfoss 077B6). If the inscription is erased, use the compatibility table:
| Refrigerator series Atlant | Thermostat model | Refrigerant type | Notes |
|---|---|---|---|
| XM-4008, XM-4010 | TAM-112-1M or K-59 | R134a, R600a | Suitable for single-chamber models |
| MHM-1705, MHM-1806 | TAM-133-1M or Danfoss 077B6 | R134a | For two-chamber refrigerators |
| NRM-6208 (No Frost) | TAM-145 or Ranco K-50 | R600a | Requires calibration after installation |
| XM-6021, XM-6026 | O-190 or TAM-125 | R134a/R600a | The kit includes a capillary tube |
2. Where to buy a thermostat?
- 🛒 Official service centers Atlant - guarantee of an original part, but the price is 20-30% higher.
- 🌍 Online stores (for example, 220-Volt, All-ZIP) - wide assortment, but check the reviews about the seller.
- 🔧 Stores of spare parts for household appliances - often in stock, you can check before purchasing.
3. Cost of thermostats:
- TAM-112/133 — from 800 to 1,500 rubles.
- Danfoss 077B6 — 1,200–2,000 rubles.
- K-59 — 600–1 000 rubles.
Attention! If you buy a thermostat with a capillary tube (for example, for models XM-6021), make sure that the length of the tube matches the original one. You cannot shorten it - this will violate the accuracy of measurements.
What to do if you cannot find the original model?
If your thermostat is discontinued (for example, TAM-112 for older models), you can choose an analogue according to technical characteristics:
- Temperature range: from -30°C to +10°C.
- Type of contacts: normally open (NO).
- Capillary tube length: at least 1.5 m.
Popular analogs: Ranco K-59 (replacement TAM-112), Danfoss 077B6 (replacement TAM-133).
Preparation for replacement: tools and safety measures
To replace the thermostat you do not need professional tools. You will need:
- ⚒️ Phillips and flat-head screwdrivers (for dismantling the casing and fastenings).
- 🔌 Multimeter (for final check).
- 📸 Phone or camera (to record the connection diagram).
- 🧲 Magnet or marker (for marking wires).
- 🧤 Gloves (protection from sharp metal edges).
Safety measures:
⚠️ Attention! Do not touch the thermostat capillary tube with bare hands - it must not be bent, shortened or damaged. This will lead to incorrect temperature readings.
- Disconnect the refrigerator from the mains at least 30 minutes before starting work - this will discharge the capacitors.
- Do not use metal objects to dismantle plastic parts - this can damage latches.
- If there is food left in the refrigerator, move it to a cool place (for example, on the balcony in winter).
Tip for organizing your workplace: Spread an old blanket or cardboard on the floor - this will protect parts from loss and protect the floor from scratches.
Disconnect the refrigerator from the outlet|Take a photo of the wiring diagram|Prepare tools and a new thermostat|Get access to the rear panel (if necessary)|Check the circuit with a multimeter again-->
Step-by-step instructions for replacing the thermostat
The replacement process takes 40–60 minutes depending on the model. We will analyze a universal algorithm suitable for most refrigerators Atlant.
Step 1. Removing the old thermostat
- Remove the temperature control knob (it fastened with a latch or screw).
- Unscrew the screws holding the thermostat protective casing (usually 2-4 pieces).
- Carefully disconnect the wires from the terminals. If the wires are oxidized, sand them paper.
- Unscrew the nut securing the thermostat to the bracket and remove it together with the capillary tube.
Step 2. Installing a new thermostat
- Place the new thermostat on the bracket and secure with a nut. Do not overtighten! A light force is enough.
- Connect the wires to the terminals according to the diagram (see photo below) Typical pinout:
- 🔘
Terminal. 3- common wire (usually brown). - 🔘
Terminal 4—to the compressor (orange/red). - 🔘
Terminal 6—to the light bulb (yellow/white).
- 🔘
Step 3. Check operation
- Connect the refrigerator to the network.
- Turn the thermostat knob to position “1” (minimum cooling). The compressor should start in 5-10 minutes.
- After 1-2 hours, check the temperature in the chamber (optimally: +4...+6°C in the refrigerator). compartment).
- If the refrigerator operates stably, close the back panel (if removed).
- The correct connection of the wires (especially
terminals 3 and 4). - Voltage in the socket (should be 220–230 V).
- Integrity of the capillary tube (there should be no kinks).
- The thermostat is located in the upper part of the fridge compartment, under the casing.
- The capillary tube is attached to the evaporator (freezer).
- Thermostat is suitable TAM-112-1M or K-59.
- The temperature regulator is located in the refrigerator compartment, on the top panel.
- There are two thermostats: one for the refrigerator compartment, the second for the freezer.
- Suitable for the refrigerator compartment TAM-133-1M, for the freezer - TAM-125.
- The thermostat is integrated into the electronic control unit.
- Requires calibration after replacement (see instructions for the model).
- Suitable TAM-145 or Ranco K-50.
Example of connection diagram for the model XM-4010. The colors of the wires may vary!
⚠️ Attention! If after replacement the refrigerator does not turns on, check:
Features of replacing the thermostat in different Atlant models
The design of thermostats in refrigerators Atlant depends on the series and year of manufacture. Here are the key differences:
1. Single-chamber models (XM-4008, XM-4010)
2. Two-chamber models (MHM-1705, MHM-1806)
3. Models with No Frost (NRM-6208, NRM-6212)
⚠️ Attention! In refrigerators Atlant manufactured after 2020, electronic thermostats can be used (for example, in series New WaveReplacement of them requires a soldering iron and skills in working with microcircuits. If your model is equipped with a display, it is better to contact a specialist. service.
How to replace the thermostat in an electronically controlled refrigerator?
In models with display (for example, Atlant NRM-8208-100), the thermostat is replaced along with the control board. Action algorithm:
- Turn off the refrigerator and remove the top cover (it is secured with 4 screws).
- Disconnect the cables from the board and remove it.
- Install a new board (the article number is indicated on the old part).
- Connect the cables and reset the settings (hold the button
Superfor 10 seconds).
Common mistakes when replacing a thermostat and how to avoid them
Even experienced technicians sometimes make mistakes that lead to repeated breakdowns. Here's what can't do when replacing a thermostat:
- 🔧 Use a thermostat from another model - even if it is similar in appearance. This will lead to incorrect operation of the compressor.
- 🔌 Connect wires at random - incorrect pinout can burn the control board.
- ❄️ Bend or shorten the capillary tube - this will disrupt its sensitivity.
- 🧲 Use force when dismantling - plastic latches are easy to break.
- 🔄 Do not check operation after replacement —if the thermostat is not calibrated, the refrigerator will freeze.
How to avoid mistakes:
- Always take photographs of the original wire connection.
- Check the new thermostat with a multimeter before installation.
- Do not turn on the refrigerator immediately after replacing - wait 10-15 minutes (this time is needed to stabilize the pressure in the system).
FAQ: Answers to frequently asked questions
Is it possible to replace the thermostat without turning off the refrigerator?
No! Working under voltage is dangerous to life. In addition, the compressor can turn on at any time, which will lead to a short circuit when manipulating the wires.
How much does it cost to replace a thermostat at a service center?
Cost of work (excluding spare parts) in 2026:
- For single-chamber models - 1,500–2,500 rubles.
- For double-chamber models - 2 000–3,500 rubles.
- For No Frost - 3,000–4,500 rubles (calibration required).
Independent replacement saves up to 80% of the cost.
Which thermostat is better: original or analogue?
Original thermostats (TAM-112, TAM-133) last longer, but cost 30–50% more than analogs (Danfoss, RancoIf your budget is limited, you can choose an analogue, but be sure to check:
- Compatibility by refrigerator model.
- Length of the capillary tube.
- Operating temperature range (must match the original).
For models No Frost it is better to take the original - analogues can do not work correctly with the electronic unit.
What to do if after replacing the thermostat the refrigerator does not freeze?
Causes and solutions:
- Incorrect wire connection —check the circuit and reconnect.
- Faulty compressor —if it does not start, diagnostics of the windings is needed.
- Freon leak —if the compressor works but does not cool, refilling is required.
- Clogged capillary tube —if it is overpressured, the thermostat will give incorrect signals.
If you are not sure of the reason, call a technician - further repairs may require special equipment.
Is it necessary to defrost the refrigerator before replacing the thermostat?
Required! Ice on the evaporator may damage the capillary tube during removal. Unplug your refrigerator 12 to 24 hours before repairs to allow it to completely defrost. You can speed up the process with a hairdryer (at minimum temperature).