How to properly remove the start relay from the compressor of the Atlant two-chamber refrigerator: instructions with nuances

The refrigerator Atlant stopped freezing, and the compressor buzzes but won't start? One of the common reasons is a malfunction starting relay, which is responsible for starting the engine. You can remove it yourself in 15–20 minutes if you know the algorithm and prepare the tools. But it is important not to confuse the relay with other parts and not damage the fragile contacts.

This article contains a step-by-step analysis of the process with photos, typical mistakes of beginners, relay compatibility table for different models Atlant, as well as advice on when it’s better not to take risks and call a specialist. If you have never worked with electrical appliances, start with the section on safety precautions - this will protect you from electric shock and short circuit.

What is a starting relay and why remove it

The starting relay is a small a plastic or metal box attached to the compressor. Its task is start the engine at the first moment, when the resistance of the windings is maximum. If the relay fails, the compressor either does not turn on at all, or operates jerkily, but does not gain the required power.

Signs of a faulty relay in the refrigerator Atlant:

• 🔊 The compressor hums, but does not start (relay clicks are heard).
• ❄️ The refrigerator does not freeze, although the light inside is on.
• ⚡ The motor turns on for 1-2 seconds and immediately turns off.
• 🔥 The relay gets hot or smells like burnt plastic.

You need to remove the relay for:

• 🔧 Diagnostics (testing with a multimeter).
• 🔄 Replacement with a new one.
• 🧹 Cleaning the contacts (if they have oxidized).

On models Atlant double-chamber (for example, MHM 1705-80, MHM 2835-08) relays are usually located next to the compressor and covered with a protective cover. Outwardly, it looks like a small box with wires screwed to the motor housing.

Tools and preparation for work

To remove the relay, you will need:

• 🔧 Phillips and flathead screwdrivers (the size depends on the screws on your model).
• 📸 Phone or camera (to take a photo of the wiring diagram!).
• 🔌 Multimeter (if you plan to check relay).
• 🧤 Rubber gloves (to protect against static electricity).
• 📦 Container for small parts (screws, springs).

Unplug the refrigerator

Get access to the back wall

Take a photo of the location of the wires

Prepare the tools

Wear gloves -->

Before starting work be sure to unplug the refrigerator from the outlet and wait until it defrosts (if it was turned on). This is necessary not only for safety, but also to avoid a short circuit if the contacts are accidentally touched.

⚠️ Attention: If your refrigerator Atlant with a system No Frost, before dismantling the relay, check whether the emergency defrost sensor has tripped. Sometimes the symptoms of its malfunction are similar to problems with the relay.

Location of the compressor and relay on the back wall of the refrigerator:

Step-by-step instructions: how to remove the start relay

The dismantling algorithm is the same for most models Atlant, but the methods of attaching the relay may differ. Follow the instructions and check the photo of your model.

Step 1: Disconnecting and defrosting the refrigerator

Unplug the plug from the socket. If the refrigerator was turned on, wait 1-2 hours for it to defrost. This is necessary to avoid condensation on the relay contacts.

Step 2: Access to the compressor

Move the refrigerator away from the wall (at least 50 cm) and remove the rear protective panel. It is secured with 4–6 screws. On some models, the panel is plastic and is held on by latches - pry it off with a flat screwdriver.

The compressor looks like a black metal cylinder with tubes. The relay is attached to it on the side or top.

Step 3: Disconnecting the wires

Attention: before disconnecting the wires, take a photo of their location or draw a diagram. An error in the reverse connection can damage the compressor!

Carefully remove the terminals from the relay contacts. If they are stuck, do not pull - drop a little WD-40 and wait 5 minutes.

Step 4: Removing the relay

The relay can be attached:

• 🔩 On screws —unscrew them with a Phillips screwdriver.
• 🔗 On latches —carefully press them out with a flat screwdriver.
• 🧲 On magnetic retainer —just pull up.

After removing the relay, inspect it for:

• 🔥 Burnt contacts.
• 💧 Traces of corrosion.
• 🧲 Cracks in the housing.

Step 5: Checking the relay with a multimeter (optional)

If you remove the relay for diagnostics, check its resistance:

1. Set the multimeter to the mode 200 Ohm.
2. Connect the probes to the contacts C (common) i NO (normally open).
3. The resistance should be within the limits 15–40 Ohm (exact see the values in the refrigerator passport).

If the readings 0 or ∞ the relay is faulty and requires replacement.

Typical errors when removing the relay and how to fix them avoid

Even experienced craftsmen sometimes make mistakes that lead to compressor breakdown or electric shock. Here are the most common:

1. Mixed-up wires when reconnecting.
   

   Always photograph or label the terminals before removing. On some models Atlant the wires are the same color, but are connected to different contacts.

2. Damage to contacts with a screwdriver.
   

   Do not use a screwdriver as a lever - the relay contacts are fragile. If the screw does not come off, try another tool.

3. Work under voltage.
   

   Even if the refrigerator is turned off with the button, it remains energized! Always unplug the plug from the socket.

4. Using the wrong relay for replacement.
   

   The relay from Atlant MKhM 1705 is not suitable for MKhM 2835 —check the markings! The table above shows compatible models.

What happens if you connect the relay incorrectly?

If you mix up the contacts C (common) i NO (normally open), the compressor can:

1. Do not start at all.

2. Work in the opposite direction (which leads to overheating).

3. Burn out in 5–10 minutes due to overload.

In the best case, the protection will work, in the worst case, the compressor will need to be replaced (cost - from 8,000 rubles).

Another common problem is Forget to check the starting relay for functionality before installing a new one. Sometimes the cause of the malfunction lies in the compressor or thermostat, and not in the relay. To avoid wasting money, first test the part with a multimeter.

When it is better not to remove the relay yourself

There are situations when dismantling the relay without experience can aggravate the breakdown:

• 🔌 If the refrigerator is under warranty, self-repair will void it.
• ⚡ If you see burnt wires or traces of melting on the compressor.
• 🛠️ If the relay is soldered to the board (found in new models Atlant s electronic control).
• 💡 If the thermostat or temperature sensor is faulty along with the relay.

In these cases, it is better to call a technician. The average cost of replacing a relay at a service center is 1,500–2,500 rubles (including diagnostics). If you are confident in your abilities, but the refrigerator does not work after replacing the relay, check:

• 🔌 The wires are connected correctly.
• 🔋 Voltage in the socket (should be 220–230 V).
• 🧊 Thermostat operation (turn the temperature control knob).

How to choose a new relay to replace

Not all relays are suitable for refrigerators Atlant. Basic parameters when choosing:

1. Relay type: RTK-X, RTP-1, DANFOSS (see markings on the old one) relay).
2. Nominal current: usually 1.2–2.5 A (indicated on the body).
3. Compatible with compressor: for Atlant compressors are often used Secop (formerly Danfoss) or Embraco.

Where to buy:

• 🛒 In specialized stores of spare parts for refrigerators (for example, 220-Volt, All-ZIP).
• 🌍 On AliExpress or eBay (but check the reviews - there are a lot of fakes!).
• 🔧 In service centers Atlant (they give a guarantee for spare parts).

Average prices for relays for Atlant:

⚠️ Attention: There are many universal relays on the market from unknown brands. They may not be suitable for current or cannot withstand the load. Buy only certified spare parts with markings that match the old relay.

Installing the relay and checking the operation of the refrigerator

Installing a new relay is done in the reverse order:

1. Fix the relay on the compressor (with screws or latches).
2. Connect the wires according to the diagram (photo you took earlier).
3. Install the protective panel.
4. Connect the refrigerator to the network.

After turning on:

• 🔊 Listen to how the compressor starts - there should be a smooth hum without clicks.
• ❄️ Check if the freezer begins to get cold (after 30-60 minutes).
• 🌡️ Make sure the light inside is on and the display (if any) shows the temperature.

If the refrigerator does not turn on:

• 🔌 Check if there is voltage in the socket.
• 🔧 Make sure the relay is connected correctly.
• 📞 Contact a technician - there may be a problem in the compressor or electronics.

FAQ: Frequently asked questions about the start relay of the Atlant refrigerator

Is it possible to repair the relay or just replace it?

In most cases, the relay is not repaired - it is sold as a single piece. Exception: if the contacts are oxidized, they can be cleaned with sandpaper (nulevkoy) and wiped with alcohol. But if the winding is burned out or the housing is cracked, replace it. is required.

How to distinguish a starting relay from a thermal protection one?

The starting relay is usually larger in size and is attached directly to the compressor. The thermal protection (aka thermal relay) is smaller, often. built into the starting relay or located separately on the compressor tube. There is a marking on the starting relay housing START or RTK.

What to do if after replacing the relay the compressor hums, but not starts?

Probable reasons:

1. The compressor itself is faulty (interturn short circuit or piston jams).
2. No freon in the system (refilling required).
3. Thermostat or module does not work controls.

In this case, complex diagnostics is needed.

Is it possible to temporarily start a refrigerator without a relay?

Technically yes, but this is extremely dangerous! Without a relay, the compressor will not be able to start correctly, which will lead to:

• Overheating windings.
• Shock loads on the network.
• Failure of the compressor.

If the relay burns out and there is no new one, it is better to turn off the refrigerator and wait for a replacement.

How long does the starting relay last?

The average service life of the relay is 5–10 years. The duration of operation is affected by:

• The quality of the electrical network (frequent power surges shorten the service life).
• The frequency of compressor switching on (if the refrigerator often open, the relay wears out faster).
• Operating conditions (high humidity leads to corrosion of contacts).

If your refrigerator Atlant is older than 10 years, it makes sense to buy a relay in reserve.