Why the compressor in the refrigerator does not work: breakdowns and solutions

You opened the refrigerator, and there was unexpected heat inside, the motor did not hum, and the food began to spoil. First thought: “Why isn’t the compressor working?” This breakdown is one of the most critical, because without a working motor, the refrigerator turns into an ordinary cabinet. But don’t rush to call a technician: in 40% of cases, the problem can be fixed on your own, saving on repairs.

In this article we will look at why the refrigerator compressor stops starting - from a banal lack of power to serious malfunctions that require the intervention of a specialist. You will learn how to check all possible causes, due to which the refrigerator compressor stops starting - from a banal lack of power to serious malfunctions requiring specialist intervention. You will learn how to check start relay, thermostat other components, as well as when do-it-yourself repairs are dangerous for equipment. For convenience, we have collected symptoms of each breakdown in the table - this will help more accurately diagnose the problem.

Important: if your refrigerator is still under warranty, any independent intervention can void it. Check the conditions in the documents or with an authorized dealer Indesit, Samsung, Atlant or another brand.

1. The compressor does not start at all: check the power supply and network problems

The first thing that needs to be ruled out is trivial electrical problems. Even if there is voltage at the outlet, this does not guarantee that it is reaching the compressor. Start with the simplest checks:

• 🔌 Check the socket: connect another device to it (for example, a table lamp). If it does not work, the problem is in the socket or wiring.
• 🔗 Inspect the power cord: often the wires fray at the base of the plug or are bent behind the back wall of the refrigerator.
• ⚡ Use a multimeter: measure the voltage in the socket (should be ~220–230 V). If it “jumps” or is below 190 V, the compressor may not start.

If everything is in order with the socket, check surge filter the refrigerator (if there is one). Modern models Liebherr or Bosch often have built-in fuses that can burn out during power surges. Replacing them will cost less than repairing the compressor.

⚠️ Attention: if when you turn on the refrigerator, the machine on the panel is triggered or knocks out the plugs, do not turn it on again this is a sign of a short circuit in the windings of the compressor or start relay. Immediately disconnect the equipment from the network!

2. Start relay: why the compressor “clicks” but does not start

One ​​of the most common reasons is a malfunction start relay. This small unit is responsible for starting the compressor, and if it fails, the motor either does not turn on at all, or tries to start, but immediately turns off with a characteristic click.

How to check the relay:

1. Unplug the refrigerator and remove the back cover (in most models the relay is mounted next to compressor).
2. Carefully remove the relay from the compressor (usually it is held on by latches or one screw).
3. Shake the relay: if you hear a knock inside or debris rattles, it is burnt out.
4. Check the contacts: carbon deposits or melting - sure sign of a malfunction.

If the relay is externally intact, you can check it with a multimeter:

• 🔧 Set the device to resistance test mode (200 Ohms).
• 🔍 Attach the probes to the coil contacts (usually terminals “A” and “S” or “1” and “2”). The resistance should be in the range of 10–50 Ohms.
• 🔋 Check the contacts for short circuit: between “A” and “M” (or “1” and “3”) the resistance should be infinite.

The cost of a new relay is from 500 to 2000 rubles, depending on the model. For refrigerators Stinol, Nord or Birusa universal relays RBM-1 or DANFOSS 103N0010are suitable. The main thing is the coincidence in current and power of the compressor.

3. Thermostat or electronic control unit: why is the compressor “silent”

If the compressor does not start, but starting relay is working properly, the problem may lie in thermostat (in mechanical models) or electronic control unit (in modern refrigerators). These nodes are responsible for sending a signal to start the engine, and if they fail, the compressor simply “does not receive the command” to turn on.

How to check thermostat:

1. Find the thermostat - usually it is located inside the chamber, behind the plastic panel (in models Atlant or Saratos it can be seen next to the light bulb).
2. Remove the protective casing and find two wires going to the thermostat. Usually these are terminals marked “3” and “4”.
3. Close them together with a screwdriver (after turning off the refrigerator!). If the compressor starts, the thermostat is faulty.

In refrigerators with electronic control (Samsung No Frost, LG Inverter), the problem is most often in control board. Signs of its malfunction:

• 🔄 The refrigerator turns on and immediately turns off (cyclically).
• 📛 Errors appear on the display (for example, E1, F2 or H1 —for decoding, see the instructions for the model).
• 🔇 The compressor does not respond to temperature changes manually.

⚠️ Attention: if you suspect a malfunction of the electronic unit, do not try to repair it yourself. Modern boards contain chips that are easily damaged by static electricity. Contact a service center - often the unit must be reflashed, and not completely replaced.

4. Freon leak: the compressor works, but does not cool

If the compressor hums and heats up, but the refrigerator does not freeze, most likely occurred freon leak. This is the refrigerant that circulates through the system and removes heat. Without it, the compressor runs “idle”, pumping air instead of freon.

Signs of a leak:

• ❄️ Condenser (grid on the rear wall) remains cold even after an hour of operation.
• 🧊 There is no frost on the evaporator tubes (in models with a drip system).
• 🔍 Oily spots are visible on the tubes or in soldering areas (freon is mixed with the compressor oil).

The most common reason leaks - pipe corrosion (especially in refrigerators older than 10 years) or mechanical damage when moving equipment. In inverter models Hitachi or Panasonic leakage can occur due to microcracks in the door heating circuit.

It is almost impossible to eliminate the leak yourself - it is required special equipment to vacuum the system and charge it with freon. The average cost of repairs in the service ranges from 3,000 to 8,000 rubles, depending on the model and type of refrigerant.

5. Mechanical breakdowns of the compressor: when replacement is needed

If the compressor buzzes, but does not start or gets very hotbut does not create pressure, the problem may be in the motor itself. Frequent reasons:

• 🔄 Piston jamming due to wear or metal shavings.
• 🔥 Interturn short circuit in the windings (the compressor hums, but does not rotate).
• 🛢️ Lack of oil —the compressor overheats and turns off due to protection.

How to check the compressor with a multimeter:

1. Disconnect the refrigerator and discharge the capacitor (by short-circuiting it with a screwdriver with an insulated handle).
2. Remove the starting relay and check the resistance between the compressor terminals:
   • C → S (working winding): 10–30 Ohm.
   • C → R (start winding): 15–40 Ohm.
   • S → R: the sum of the two previous values (25–70 Ohm).

If the resistance is 0 - short circuit, if infinity - open.

If the compressor is faulty, it will have to be replaced replace. The cost of a new motor is from 5,000 to 15,000 rubles, plus the work of a master (another 3,000–6,000 rubles). For refrigerators older than 10 years, replacing the compressor is often unprofitable - it is cheaper to buy new equipment.

How to extend the life of the compressor?

Regularly defrost the refrigerator (frost on the evaporator increases the load on the motor). Do not place equipment near a radiator or stove. Keep the condenser clean - dust impairs heat transfer and causes the compressor to wear out.

6. Capillary tube clogged: why the compressor works, but does not freeze

If the compressor works without stopping, but the refrigerator does not cool, it is possible clogging of the capillary tube. This is a thin copper tube through which freon enters the evaporator. Over time, it may become clogged:

• 🔧 Oxides from oil decomposition.
• 🧊 Wet plug (if the system was not properly evacuated).
• 🔄 Metal shavings after wear of the compressor.

Signs of a blockage:

• 🌡️ The condenser is hot only at the beginning, then cools down.
• ❄️ The evaporator is covered with frost unevenly (for example, only in one corner).
• 🕒 The compressor operates for more than 20 minutes without shutting down.

The blockage can only be removed using hydraulic flushing or nitrogen purging. In the service, this procedure will cost 2000–4000 rubles. If the blockage is severe, you may need to replace the capillary tube (another +1500–3000 rubles).

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

Not all breakdowns can be repaired yourself. Contact a specialist if:

• 🔥 Compressor smoke or smells like burning is a sign of a short circuit in the windings.
• ⚡ When you turn on the refrigerator automatic is triggered on the dashboard.
• 🧊 On the back wall there appeared oily drips a leak of freon with oil.
• 🔧 After replacing parts (relay, thermostat) the problem remains.
• 📛 The display lights up unknown error (for example, E5 v Samsung or F7 in Indesit).

Average prices for repairs in service centers (Moscow and regions):

Before the technician's visit do not turn on the refrigerator - this may aggravate the breakdown. If the equipment is under warranty, repairs should be free (except for cases of mechanical damage or improper operation).

FAQ: Frequently asked questions about a non-working compressor

Is it possible to start the compressor directly, without a relay?

Technically yes, but this extremely dangerous. overheating. If you connect the motor directly, it can burn out in a few minutes. For temporary diagnostics, you can close the relay contacts with a screwdriver (for 1-2 seconds!), but not longer.

Why does the new compressor not start after replacement?

There may be reasons different:

• 🔌 Incorrect terminal connection (check the diagram!).
• 🧊 There is air or moisture left in the system (re-vacuumization is needed).
• 📛 Incompatibility of the compressor model with the refrigerator (different types of freon or oil).

Contact the technician who performed the replacement - he must fix the problem under the warranty.

How much does a new compressor for a refrigerator cost?

The price depends on the model and type:

• Regular compressor (for example, Danfoss NL6N): 5000–8000 ₽.
• Inverter compressor (for Samsung, LG): 10 000–15 000 ₽.
• Compressor for Side-by-Side: 12 000–20 000 ₽.

Plus the cost of work (3000–6000 rubles) and freon (1000–2000 ₽).

Can the compressor not work due to a dirty condenser?

No, the compressor will not stop starting due to dust on the condenser, but it will turn on more often and work longerwhich reduces its service life. Clean the grille with a vacuum cleaner or brush. - this will improve heat transfer and reduce the load on the motor.

What to do if the compressor works, but the refrigerator does not freeze?

Probable reasons:

1. Freon leak (refill required).
2. Capillary tube clogged (flushing required).
3. No Frost fan malfunction (in models with a dry freezing system).
4. Failure of the temperature sensor (in electronic refrigerators).

You can check only the fan yourself (turn it by hand - it should rotate easily). Other problems require diagnostics in the service.