How to open the Atlant refrigerator relay correctly: step-by-step analysis with photos and advice from experts

The refrigerator relay Atlant is a small but critical unit responsible for starting the compressor and protecting the system from overloads. When the refrigerator suddenly stops freezing, clicks loudly or does not turn on at all, in 60% of cases the problem lies in this device. However, getting to it is not so easy: the manufacturer hid the relay under a protective casing, and careless actions can lead to damage to the contacts or leakage of refrigerant.

In this article you will find step-by-step instructions for dismantling the relay for popular models Atlant (series MHM, HM, NRM), list of necessary tools and unique techniques that service engineers use to safely remove the lid without breaking the latches. We will also look at how to distinguish a relay malfunction from a thermostat or compressor breakdown - this will save you time and money on diagnostics.

Where is the relay in the refrigerator Atlant and how to identify it

In most models Atlant the relay is located on the compressor - a metal cylinder at the bottom of the rear wall. It is attached to the starting device and covered with a plastic or metal casing. Externally, the relay looks like a small box the size of a matchbox, with protruding wires and a characteristic locking button (in some modifications).

In order not to confuse the relay with other elements, pay attention to:

• 🔌 Connection to the compressor: 2-3 wires come from the relay, which are connected to the contacts on the compressor housing. Usually these are terminals with the designations S (start), R (working winding), C (common contact).
• 📏 Size and shape: modern relays Atlant have a rectangular body (approximately 5×3×2 cm) with latches on the sides. Old models (before 2015) could be equipped with round relays with screw fastening.
• 🔍 Marking: numbers and letters are often printed on the body, for example, RT-1, DANFOSS 103N0210 or Atlant KZ-11. This will help you choose an analogue when replacing.

If your refrigerator belongs to the series MXM-170 or XM-4026, the relay can be hidden under the decorative panel on the side of the compressor. In models with a system No Frost (for example, NRM-618), access to the relay is complicated due to the additional fan - it will have to be temporarily removed.

⚠️ Attention: On refrigerators Atlant 2018–2023 releases, the relay can be integrated into a single control unit with a thermostat. In this case, independent repairs without a connection diagram can lead to failure of the entire board.

Preparation for dismantling: tools and safety measures

Before opening the relay, make sure that the refrigerator completely disconnected from the network is left for at least 10 minutes. This is necessary so that the capacitors in the power circuit are discharged - they can retain dangerous voltage even after the plug is turned off. Also prepare:

• 🔧 Screwdrivers: cross (PH2) and flat (3-4 mm) with insulated handles. For screws with protective heads, you may need a torx screwdriver T10 or T15.
• 📸 Smartphone: to photograph the original position of the wires and terminals. This will save you from errors during reassembly.
• 🧲 Magnet: for holding small screws and nuts - they are easily lost in hard-to-reach places.
• 🧤 Dielectric gloves (optional): if you are not sure there is no residual voltage.

Work in a well-lit place. If access to the back wall of the refrigerator is difficult, move it 50–60 cm away from the wall. Do not place tools on top of the refrigerator - they may fall on the compressor and damage it.

Step-by-step instructions: how to remove the relay cover on a refrigerator Atlant

Process dismantling depends on the type of relay mounting. We will look at the two most common options: latches (modern models) and screws (old refrigerators).

Option 1: Relays with plastic latches (models after 2016)

This type of fastening is used in most refrigerators Atlant series MHM and HM. The main difficulty is not to break the fragile latches when removing the cover.

1. Unplug the refrigerator and remove the lower decorative panel (if there is one) by pulling it towards you.

2. Find the relay on the compressor. It is usually located on the right or on top of the metal cylinder.

3. Take a flathead screwdriver and carefully pry the relay cover off the side where the gap is visible. Do not press too hard - the plastic may crack!

4. When the lid lifts a little, pull it up while holding the compressor with your other hand (it may move). The latches should come out of the grooves.

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Option 2: Relay with screw fastening (models before 2015 year)

In old refrigerators Atlant (for example, MXM-160 or XM-4010) the relay is secured with 1-2 screws. The main thing here is not to lose hardware or mix up the wires during reassembly.

1. Unscrew the screws holding the relay cover. They can be hidden under stickers or plugs.

2. Remove the cover and put it and the screws in a safe place.

3. If a plate with a spring mechanism is visible under the cover, this is an old-style start-up relay. It cannot be disassembled further without special skills!

In some models, the screws may be “stuck” due to oxidation. In this case, do not try to unscrew them by force - spray WD-40 and wait 5-10 minutes.

What to do if the screw breaks when unscrewing?

If the screw head is cut off, try unscrewing it with pliers or drilling it with a drill with a thin drill bit (1.5–2 mm). As a last resort, you can carefully drill out the hole and cut a new thread with an M3 or M4 tap. But remember: this is a temporary solution - after such repairs it is better to replace the entire relay.

How to test the relay for functionality without special instruments

If you have removed the cover, but are not sure that the problem is in the relay, perform simple diagnostics. You don't need a multimeter for this - just attentiveness and a screwdriver.

Method 1: Checking "by ear"

Plug in the refrigerator and listen:

• 🔊 Click and compressor hum: if after a click the compressor starts, the relay is working properly.
• 🔇 Click without starting: the relay is activated, but the compressor does not start - a winding break or motor jamming is possible.
• 🔈 Multiple clicks in a row: the relay “sticks” and does not hold contact - replacement is required.

Method 2: Visual inspection

Inspect the relay contacts under the cover:

• ⚡ Charring or melting on the terminals - a sign of a short circuit.
• 💧 Corrosion or green plaque —oxidation due to moisture.
• 🧲 Chips on plastic —mechanical damage during previous repairs.

If you If at least one of these signs is detected, the relay must be replaced. It is useless to try to clean the contacts with sandpaper - this is a temporary measure that will extend the life of the unit by a maximum of 1-2 months.

Typical errors when opening a relay and how to avoid them

The experience of craftsmen shows that 80% of breakdowns after self-repair are associated with three errors: incorrect removal of the cover, mixed up wires and damage to the O-rings. Let's look at them in more detail.

Error 1: Broken lid latches

Plastic latches on the relay Atlant are fragile, especially in refrigerators that have been in use for more than 5 years. If you try to pry the cover with a screwdriver in the middle, the risk of breaking them is 90%. The correct way:

• Press the cover closer to the edge where the latch is.
• Pull it up, not to the side - this way the latch will come out of the groove without deformation.

Error 2: Mixed up wires

If you removed the cover and disconnected the wires, but did not remember their location, the compressor may burn out if connected incorrectly. Here is the standard diagram for Atlant:

If the colors of the wires do not match, check the photo you took before dismantling, or find a diagram for your model in the instructions.

Error 3: Damage to the O-ring

Under the relay cover there is often a rubber ring that prevents the entry of dust and moisture. If you lose or tear it, the contacts will begin to oxidize and the relay will quickly fail. Solution:

• Before removing the cover, check whether there is a seal under it.
• If the ring is torn, replace it with a new one (can be cut from sheet rubber 1-2 mm thick).

⚠️ Attention: B refrigerators Atlant with inverter compressors (series New Wave), the relay can be hidden under a metal plate. An attempt to remove it without a special hex key will lead to deformation of the fasteners.

When it is useless to open the relay: signs of other malfunctions

Clicks or failure of the compressor are not always associated with the relay. Sometimes the problem lies in the thermostat, the starting capacitor or the motor itself. Here's how to distinguish them:

• 🌡️ The thermostat does not work: the refrigerator does not turn on at all, the light inside the relay does not light. in this case it is silent - no clicks.
• ⚡ Failure of the starting capacitor: the compressor is humming, but does not start; the capacitor is swollen or liquid is leaking. The relay clicks, but no current flows to the windings.
• 🔧 Stuck compressor: the relay clicks, but the motor does not rotate - a characteristic hum is heard. At the same time, the compressor housing gets very hot.

If you observe one of these symptoms, opening the relay will not help. In the case of a thermostat or condenser, you can replace them yourself, but it is better to trust the repair of the compressor. the technician will need to evacuate the system and charge it with freon.

FAQ: Frequently asked questions about refrigerator relays Atlant

Is it possible to clean the relay contacts with sandpaper?

Cleaning the contacts with sandpaper (zero) gives a temporary effect - maximum 1-2 months. At the same time, you erase the protective coating from the contacts, and they begin to oxidize faster. If the relay is already clicking or burnt out, it is better to immediately replace it with a new one. The cost of the original relay for Atlant is from 500 to 1200 rubles, which is cheaper than risking a compressor (replacing it will cost 4-6 thousand rubles). data-i="219">nulevka

How to check a relay with a multimeter?

To check a relay with a multimeter:

1. Set the device in resistance measurement mode (200 Ohm).
2. Connect the probes to terminals S i C (starting winding). The resistance should be within 15–40 Ohm.
3. Change the probes. on R i C (working winding). Here the resistance is lower - 5–15 Ohm.
4. If at least at one of the stages the multimeter shows 0 (short circuit) or 1 (break), the relay is faulty.

Also check the circuit between S and R —the resistance should tend to infinity (there is no short circuit between the windings).

What to do if after replacing the relay the compressor does not start?

If the new relay is installed correctly, but the compressor does not start, check:

• The polarity of the wires (especially if you are using a non-original relay).
• The voltage in the socket - it should be 220–230 V (at low voltage, the compressor will not start).
• The state of the starting capacitor - it could fail in parallel with the relay.
• Grounding the refrigerator - sometimes the current leakage protection is triggered.

If everything is in order, but the motor does not hum, the compressor winding may have burned out. In this case, it will need to be replaced.

Is it possible to temporarily close the relay contacts so that the refrigerator works?

Theoretically, yes, but this extremely dangerousIf you close the contacts S and C directly, the compressor will start, but:

• It will work without protection against overheating - the risk of burning out the windings.
• If the voltage surges, the motor may fail building.
• The warranty on the refrigerator will be lost (if it was still valid).

This method is only suitable for short check (no more than 5 minutes) or in conditions where it is impossible to replace the relay right now. After the test, immediately disconnect the refrigerator from the network!

Where to buy an original relay for a refrigerator Atlant?

Original relays for Atlant can be found:

• In branded service centers (a suitable model is guaranteed, but the price is 20–30% higher).
• In stores of spare parts for household appliances (for example, 220 Volt, All-ZIP).
• At Avito or Yule (cheaper, but there is a risk of running into a used part with wear).

When purchasing, please specify:

• Refrigerator model (e.g. Atlant MHM-1708).
• Relay type (usually indicated on the case: RT-1, DANFOSS etc.).
• Year of manufacture (for refrigerators older than 2010, the connectors may differ).