Relay in an Atlant two-chamber refrigerator: where it is, what it looks like and how to check it

If your two-chamber refrigerator Atlant suddenly stops freezing, hums nonstop, or, conversely, does not turn on at all, the problem may lie in a faulty relay. This small but critical element is responsible for starting the compressor and protecting against overloads. However, finding it is not always easy: depending on the model the relay can be hidden under the compressor cover, behind the back panel or even inside the electronic unit.

In this article we will look in detail at where exactly the relay is located in refrigerators Atlant different series (from classic MHM to modern NRM), how to visually distinguish it from other parts, and also give a checklist for self-diagnosis. You will learn why the relay fails, what tools you will need to check and when you should call a technician instead of risking the equipment.

⚠️ Warning: Work with electrical components of the refrigerator requires compliance with safety precautions. If you are not confident in your skills, it is better to contact a specialist - incorrect connection of the relay can lead to short circuit or failure of the compressor.

1. What types of relays are used in Atlant refrigerators

In two-chamber refrigerators Atlant two main types of relays are used, each of which performs its own function:

• 🔧 Start-protection relay —responsible for starting the compressor and protecting it from overheating. In 90% of cases of breakdowns, it is precisely this that is to blame.
• 🌡️ Thermostat (thermostat) - regulates the temperature, turning the compressor on/off based on a signal from the sensor. It breaks down more often in models with mechanical control.

In older models (for example, Atlant MKhM-1708 or MKhM-1840) it was installed electromechanical relay type RTK-X or DHR, which was attached directly to the compressor housing. New refrigerators (series NRM, HM) are often found electronic units with built-in relays, which are more difficult to diagnose without a circuit.

⚠️ Attention: In models with the system No Frost (for example, Atlant XM 4625-101) the relay can be integrated into the control board. Self-repair of such refrigerators without experience is fraught damage to electronic components.

2. Where is the start-up protection relay located in the Atlant refrigerator

The location of the relay depends on models and years of manufacture the refrigerator. Below we have given typical installation locations for different series:

To find the relay in models MHM:

1. Disconnect the refrigerator from the network.
2. Remove the back cover (it is secured with latches or screws).
3. Find the compressor - it is a black “barrel” with tubes.
4. On the compressor body there will be a plastic box measuring ~5x5 cm - this is it start-protection relay.

In refrigerators HM i NRM the relay can be hidden deeper. For example, in Atlant XM 4626-101 it is located behind the control panel (you need to remove the top cover of the freezer).

What does a relay look like?

Usually it is a black or gray plastic box with two or three terminals for wires. It may have markings like "RTK-1", "3TS-15K" or "WXF-4".

3. How to distinguish a relay from other parts: photos and diagrams

Relays are often confused with thermostat, capacitor or fuse. Here are the key features by which it can be identified:

• 🔌 Has 2-3 terminals for connecting wires (usually marked as S, M, L).
• 📏 Size ~5×5 cm, shape - rectangular or square.
• 🔧 Mounted directly to the compressor or on the control board.
• 📝 There are markings on the case (for example, RTK-X, DANFOSS 103N0210).

For clarity, here is a relay connection diagram in a typical refrigerator Atlant MHM-1708:

Compressor
│
▼
┌───────────┐
│ Relay │ ←─ C (common)
│ │ ←─ M (motor)
└───────────┘
│
▼
Thermostat ―→ L (line)

⚠️ Attention: Atlant NRM-6024 Step-by-step instructions: how to check a relay with a multimeter In models with No Frost the circuit is more complicated - the relay can be part of an electronic module. For example, in Atlant NRM-6024 it is integrated into the board EVM-4, and will be required continuity test with a multimeter.

4. Step-by-step instructions: how to test a relay with a multimeter

Before checking the relay, make sure that it is the problem. Typical symptoms of a malfunction:

• ❄️ The refrigerator does not freeze, but the light inside is on.
• 🔊 The compressor is humming, but not working. starts.
• 🔌 The refrigerator turns on for 1-2 seconds and immediately turns off.

For diagnostics you will need multimeter (dialing mode) and a screwdriver Follow the algorithm:

1. Unplug the refrigerator and turn its back wall towards you.

2. Remove the relay cover (it can be on latches or screws).

3. Disconnect the wires from the terminals (take a photo of their location!).

4. Ring the contacts S i M —the resistance should be ~20-40 Ohms.

5. Check the contact L for an open circuit (in the normal state the circuit is open).-->

If continuity:

• 🚫 There is no resistance between S and M → winding break, the relay needs to be replaced.
• ⚡ Resistance between L and other terminals → sticking of contacts.

⚠️ Attention: In electronic relays (models XM/NRM) may require verification voltage on the board. Without experience, it is better to entrust this to a specialist - the risk of damage to the microcircuits is high.

5. How to replace a relay yourself: step-by-step master class

If diagnostics have confirmed that the relay is faulty, you can replace it yourself. You will need:

• 🔧 New relay (analogue of the old one in marking).
• 🔨 Phillips/flat head screwdriver.
• 📸 Camera (to record the connection of wires).

Instructions for use replacement:

1. Disconnect the refrigerator from the network and unfold it.
2. Remove the relay cover (in models MHM it is plastic, secured with latches).
3. Disconnect wires, remembering their location (it’s better to take a photo!).
4. Unscrew the screws securing the relay to the compressor.
5. Install a new relay, connect the wires in the same order.
6. Close the lid and turn on the refrigerator.

⚠️ Attention: B refrigerators No Frost (for example, Atlant NRM-6208) the relay can be soldered to the board. To replace you will need a soldering iron and experience working with electronics.

6. Common mistakes when searching and replacing relays

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

• 🔌 Incorrect wire connection - if you mix up S and M, the compressor will not start.
• 🔧 Use of an incompatible relay -for example, staging RTK-1 instead 3TS-15K.
• 🛠️ Damage to the wire insulation when removing/installing, which leads to a short circuit.
• 📸 No photographs of the connection diagram —without them it is easy to confuse contacts.

To avoid problems:

1. Always check the markings an old relay before buying a new one.
2. Use heat shrink tube to insulate bare wires.
3. After replacement check the work refrigerator for 24 hours - sometimes defects do not appear immediately.

⚠️ Attention: In refrigerators with inverter compressors (for example, Atlant XM 6321-100) is used specialized relay, which is not interchangeable with conventional ones. Check compatibility with the seller!

7. When to call a technician: 5 signs of a serious breakdown

Not all faults can be fixed on your own. Contact a specialist if:

• ⚡ Refrigerator electric shock when touching the case.
• 🔥 Visible on the control board burnt elements or tracks.
• 🛠️ After replacing the relay, the compressor does not start, but the relay is working.
• 🌡️ Temperature in cameras unstable (either too low, then too high).
• 📉 Lights up on the display error (for example, E1, F2).

In these cases, the problem may be:

• Malfunction compressor (interturn short circuit, piston wear).
• Failure control board (reflashing or replacement required).
• Leakage freon (refilling and soldering of tubes required).

Average cost of repair in a service center:

⚠️ Attention: Prices do not include the cost of spare parts and may vary depending on the region and model of the refrigerator. Check current rates at local service centers.

FAQ: Answers to frequently asked questions

🔍 How to understand that the relay has burned out and not the compressor?

If the compressor buzzes, but does not startthe problem is most likely in the relay. If the compressor is completely silent does not show signs of life, either it itself or the thermostat is to blame. For an accurate diagnosis, check the resistance of the compressor windings. multimeter (between the terminals C-S, C-M, S-M there should be ~10-30 ohms).

🛒 Where to buy a relay for the Atlant refrigerator?

The new relay can be found:

• At Atlant service centers (original spare parts).
• At AliExpress (search by marking, for example, RTK-X).
• In stores radio components (if you know the exact parameters).

Cost - from 300 to 1,500 rubles depending on the type.

⚡ You can is it possible to start a refrigerator without a relay?

Technically possible, but highly not recommended. Without a relay, the compressor will operate without overheating protection, which will lead to it. rapid failureIf you urgently need to save food, you can temporarily connect the compressor directly (via an extension cord with a button), but not. more than 1-2 hours and under constant control!

🔧 Which relay is suitable for the Atlant XM 4626-101 model?

This model uses electronic relay type WXF-4 or QP2-4.5. The exact marking can be found on the old relay or. in refrigerator passport. When purchasing, specify that you need an analogue for inverter compressor (if installed).

🛠️ How long does it take to replace a relay?

If the relay is external (models MHM), replacement will take 15-30 minutesIn refrigerators with No Frost (series NRM) may take up to 1-2 hours due to the need to disassemble the control panel.