How to properly open the refrigerator compressor: disassembly without the risk of breakage

Opening a refrigerator compressor is a task encountered when diagnosing malfunctions, changing oil or repairing windings. However, this unit is hidden behind a metal casing, and incorrect actions can lead to freon leakagedamage to the tubes or even short circuit. In this article we will look at how to get to the compressor in refrigerators of different brands (Atlant, Indesit, Samsung, LG), what tools will be needed and how to avoid common mistakes.

It is important to understand: a compressor is not just a “motor” refrigerator", and the sealed system is under pressure. Even if you only plan to inspect it for oil drips or overheating, violation of the integrity of the circuit will require subsequent recharging the refrigerant vacuation. Therefore, before you start disassembling, evaluate your strength: it may be easier to call a specialist to diagnose error code (for example, E1 y Bosch or FF y Samsung).

If you are determined to act on your own, follow the instructions below. We will describe in detail each stage: from turning off the power to removing the start-up relay. And at the end of the article you. you will find FAQ with answers to frequently asked questions, for example, is it possible to start a compressor without a casing or how to check its resistance with a multimeter.

1. Preparation: tools and safety precautions

Before you start disassembling, prepare workplace and tools. The compressor is located at the bottom of the refrigerator (usually at the back), therefore:

• 🔌 Unplug the refrigerator and unplug the plug from the socket - even when turned off, voltage may remain on the capacitor.
• 🧊 Defrost the refrigerator (if it is not No Frost) and remove all food. It is strictly forbidden to operate the compressor with the power on or the chambers full.
• 🔧 Prepare the tools:
  • Phillips and flathead screwdrivers (for casing and relay screws).
  • Socket wrenches or heads 8 mm, 10 mm (for fastening the compressor).
  • Pliers and wire cutters (for clamps and clamps).
  • Multimeter (for checking the windings).
  • Flashlight or table lamp (back panel lighting).
• 📸 Take a photo of the location of the tubes and wires before disassembling - this will help you put everything back together correctly.

Pay special attention hand and eye protection. The compressor casing often has sharp edges, and oil under pressurecan remain in the system. Use:

• 🧤 Rubber gloves (protection from oil and cuts).
• 👓 Glasses (when working with metal parts).
• 🩹 First aid kit (in case of cuts from sharp edges).

⚠️ Attention: If your refrigerator is under warranty, disassembling the compressor will lead to cancellation of warrantyCheck the warranty period in the documents or on the manufacturer's website.

2. Removing the rear panel and accessing the compressor

The compressor in most refrigerators (Stinol, Beko, Liebherr) is hidden by a metal casing that is attached to the back wall. To remove it:

1. Unscrew the screws that secure the rear panel. Usually there are 4-6 around the perimeter. In some models (Samsung RB***), the panel can be secured with latches - carefully. pry it off with a screwdriver.

2. Remove the panel and set it aside. Under it you will see a compressor (black or gray cylinder with tubes), a capacitor (grid) and a start-up relay (box with wires).

3. Inspect the compressor for visible damage:

   • 🔥 Blackening or melting on the relay is a sign of interturn short circuit.
   • 💧 Oil drips on the tubes - possible freon leakage.
   • 🔊 Strong vibration during operation - wear shock absorbers.

If the compressor is covered with a thick layer of dust, clean it soft brush or a vacuum cleaner. Never use water or liquid cleaners - this can cause corrosion of the relay contacts.

⚠️ Attention: In refrigerators with a system No Frost (Samsung, LG) the compressor can be hidden under layer of foam. Do not damage capillary tube when removing the insulation - it is thin and bends easily.

3. Disconnecting the start-up protection relay

The start-up protection relay is the “brain” of the compressor, which controls its startup and protects against overheating. To get to the compressor itself, the relay must be removed. Proceed as follows:

1. Disconnect the wires from the relay. Usually there are three of them:

   • 🔌 Common wire (black or brown).
   • 🔋 Starter (red or orange).
   • 🔄 Worker (white or blue).

Take a photo of the connection diagram or mark the wires with electrical tape.

Unscrew the screws securing the relay to the compressor (usually 2-3 pieces). In some models (Whirlpool), the relay is fixed with a latch - press it with a screwdriver.

Remove the relay and inspect its contacts. If they are burnt or melted, the relay must be replaced.

After removing the relay, you will have access to compressor contacts — three pins (sometimes four) to which the wires were connected. They can be used for winding continuity a multimeter (more on this in the next section).

Refrigerator power is turned off|

The rear panel|

The wires from the relay were disconnected|

The connection diagram was photographed|

The relay contacts were checked for damage-->

4. Checking the compressor without depressurization

Before opening the compressor, make sure that it is the problem. To do this, run winding diagnostics a multimeter. Test algorithm:

1. Set the multimeter to resistance measurement mode (200 Ω).

2. Connect the probes to the compressor contacts:

   • 🔢 Between common (left pin) and starter (top) contacts the resistance should be 20–40 Ω.
   • 🔢 Between general and working (right) - 10–20 Ω.
   • 🔢 Between starting and working —the sum of the two previous values (30–60 Ω).

If the readings are equal 0 (short circuit) or ∞ (break), the compressor is faulty.

Check insulation resistance between any contact and the compressor housing It should be > 2 MΩ. there is breakdown to the housing.

If the compressor “rings” normally, but the refrigerator does not freeze, the problem may be:

• 🧊 Leakage of freon (required refilling).
• 🔌 Thermostat malfunctions or control board.
• 🔄 Clogged capillary tube.

What to do if the multimeter shows break?

If the resistance between any two contacts is infinity (∞), this means a break in the winding. In this case, the compressor must be replaced - repairing the windings at home is almost impossible due to the tightness of the system. The only exception is if a break occurs in the wire running from the relay to the compressor (this happens in models Indesit older than 10 years). In this case, you can try to re-solder the wire, but only if you have experience working with a soldering iron and follow safety precautions.

5. Disassembling the compressor: when necessary

Opening the compressor is an extreme measure that is required in three cases:

1. Oil change. If the compressor works, but heats up more than usual, the oil may have lost its properties. This is true for refrigerators older than 15 years.

2. Repair of valvesWhen knock or uneven operation the compressor may need to be replaced. groups.

3. Elimination of mechanical damageFor example, if the piston rod is broken during transportation.

To disassemble the compressor you will need:

• 🔧 Special puller for the compressor cover (can be made from a metal plate).
• 🛠️ Set of end keys.
• 🧴 Sealant for refrigeration systems (for example, Loctite 577).
• 💨 Nitrogen cylinder (for purging the system before refueling).

Step-by-step instructions:

1. Unsolder suction and discharge pipes from the compressor. Use a propane torch and flux for copper. Do not overheat the tubes - this may narrow their clearance.

2. Unscrew the 4 bolts securing the compressor cover (usually a turnkey 10 mmThe cover sits on the sealant - it must be carefully pryed off with a puller.

3. Remove the cover. and inspect the insides:

   • 🔴 Piston and cylinder —there should be no burrs or chips.
   • 🟢 Valves —check their mobility and integrity.
   • 🟡 Oil —if it is black or with metal shavings, replacement is required.

⚠️ Attention: After opening the compressor You cannot start without filling with oil and freon. Dry operation will lead to jamming of the piston and complete failure of the unit.

6. Common mistakes and how to avoid them

Even experienced professionals sometimes make mistakes when working with a compressor. Here are the most common ones and ways to prevent them:

Another common problem is insufficient fixation of the compressor after assembly. If the fastening bolts are loosely tightened, vibration during operation can lead to:

• 🔊 Strengthening noise.
• 🔥 Rubbing of wires against the body.
• 💥 Bursting of tubes (in extreme cases).

To avoid this, use torque wrench and tighten the bolts with force 8–10 Nm (data for most household compressors).

7. Assembly and first start-up

After repairing or diagnosing the compressor, reassemble everything in reverse. sequences:

1. Install the start-up protection relay and connect the wires in accordance with the diagram.

2. Fix the compressor on the shock absorbers (rubber pads). Make sure that it does not touch the refrigerator body.

3. Install the back panel and secure it with screws.

4. Connect the refrigerator to the network and start it in test mode (without products).

At the first start after repair:

• 🕒 Let the compressor run 10–15 minutes without opening the doors.
• 👂 Listen to the sounds:
  • ✅ Normal: uniform humming, light vibration.
  • ❌ Cracking, knocking, grinding is a sign of a malfunction.
• 🌡️ Check whether capacitor (the grill at the back) is heating up. If it remains cold, there is no freon in the system.

⚠️ Attention: If after assembly the refrigerator does not turn on, check:

• The wires are connected correctly to the relay.
• Presence of voltage in the socket (it may have worked automatic in the dashboard).
• Integrity thermostat (if there is a malfunction, it can block the start).

8. When is the best time to call? masters

Despite detailed instructions, some situations require professional intervention. Contact a specialist if:

• 🔧 Required compressor replacement - this requires special tools (pipe cutter, vacuum pump, pressure gauge station).
• 💨 Detected freon leak —it is impossible to restore operation without refilling equipment.
• ⚡ The problem is electronics (control board, sensors) - for diagnostics you need an oscilloscope.
• 🔥 Compressor jammed - it will have to be cut off with a grinder and installed new.

The cost of replacing the compressor in service centers in 2026 is:

• 💰 Diagnostics — from 1,500 to 3,000 ₽.
• 💰 Replacement of the compressor — from 5,000 to 12,000 ₽ (including refilling with freon).
• 💰 Repair of windings — from 3,500 ₽ (but they provide a guarantee for such work rarely).

If your refrigerator is older than 10 years, sometimes it is more expedient to buy a new one than to repair an old one. For example, replacing a compressor Atlant MXM-170 can cost 70–80% of the cost of a new refrigerator of the same volume.

FAQ: Frequently asked questions about the compressor refrigerator

Is it possible to start a refrigerator without a compressor casing?

Technically yes, but this unsafe. The casing protects against:

• 🔥 Fire due to short circuit.
• 💥 Foreign objects getting into the fan blades (in models with No Frost).
• 🐭 Damage rodents (if the refrigerator is in a garage or in a country house).

If the casing is damaged, it can be temporarily replaced with metal mesh with small cells, but do not leave the compressor completely open.

How to check if it is working compressor without disassembling the refrigerator?

There are three ways:

1. 👂 By hearing: with the refrigerator running, put your hand to the back wall. If the compressor hums and vibrates, it is working. Silence or clicks without starting the motor indicate a malfunction.

2. 🌡️ By condenser temperature: 15-20 minutes after switching on, the grill at the back should heat up. If it is cold, there is no freon or the compressor is not pumping.

3. 🔌 Multimeter: ring the relay contacts (between terminals S i M The resistance should be 20–50 Ω).

What to do if the compressor is heating up but not freezing?

The reasons may be the following (by frequency):

1. Freon leakage (60% of cases Required). refilling.

2. Clogged capillary tube (20%) Needs cleaning or replacement.

3. Faulty compressor valves (15%) Needs repair or replacement.

4. Failure of the control board (5%) Needs flashing or replacement.

You can only check it yourself voltage on the compressor (should be 220 V).For other diagnostics you need special equipment.

How much does a new compressor for a refrigerator cost?

The price depends on the model and power:

Compressor type	Approximate models of refrigerators	Cost, ₽
Linear (regular)	Atlant, Biryusa, Stinol	4 000 – 7 000
Inverter	Samsung, LG, Bosch	8 000 – 15 000
For two-chamber refrigerators	Indesit, Ariston	6 000 – 10 000
For Side-by-Side	Samsung RS, LG GC-	12 000 – 20 000

When purchasing a compressor, pay attention to:

• 🔧 Refrigerator model (must match or be compatible).
• 💨 Refrigerant type (for example, R134a or R600a).
• 🔌 Power (must be no lower than the original one).

Is it possible to repair the compressor refrigerator with your own hands?

Partly yes, but with reservations:

• ✅ Oil change —possible with a vacuum pump.
• ✅ Cleaning or replacing valves —if you have experience working with sealed systems.
• ❌ Repair of windings —is practically impossible at home due to tightness.
• ❌ Replacing the piston or rod —requires turning work and special equipment.

In 90% of cases, independent compressor repair is justified only for vintage refrigerators (for example, ZIL or Minsk), where spare parts are difficult to find, and the design is simpler than modern models.