The refrigerator turns on and immediately turns off - what to do?

Did you notice that the refrigerator began to behave strangely: the motor starts for 1-2 seconds, a loud click is heard - and the unit “falls asleep” again? This problem occurs in both old Samsung RL-33 or Indesit BIAA 13and new models LG DoorCooling+ or Bosch KIN86AF30. In 80% of cases, this is a signal of a malfunction that can be diagnosed without calling a technician.

Short on/off cycles (the so-called “clicking”) are not just annoying - they lead to overheating of the compressor, increased energy consumption and food spoilage. In this article we will analyze exact reasons this behavior of the refrigerator, from simple (poor voltage in the network) to complex (turn-to-turn short circuit in the motor winding). We will also give step-by-step instructionshow to check each element of the system yourself - with photos, diagrams and video examples.

Spoiler: in 30% of cases the problem is solved in 10 minutes without tools. But if you hear a characteristic burning smell or smoke from the back panel -immediately unplug the refrigerator and do not turn it on until repairs!

1. Checking the power supply: why the refrigerator “blinks” due to the network

The first thing to rule out is external factors. The refrigerator may turn on and turn off immediately due to unstable voltage or poor contact in the socket. This is the most harmless reason, but it is often overlooked.

How to check:

• 🔌 Connect the refrigerator to another outlet (preferably on a separate line, without tees). If the problem disappears, the electrical wiring is to blame.
• ⚡ Measure the voltage with a multimeter. Standard for refrigerator: 200–240 V. For values lower 180 V or higher 250 V the compressor will operate abnormally.
• 🔋 Check the power cord for kinks, melting or damage to the insulation. Especially on models with No Frostwhere the cable often rubs against the back wall.

If the voltage is normal, but the refrigerator still “clicks”, proceed to the next step. But if the multimeter shows jumps, set voltage stabilizer (for example, Resanta ASN-1000/1-C or Calm IS1000). This will protect the equipment from burning out during surges.

⚠️ Attention: Refrigerators with inverter compressors (Samsung Digital Inverter, LG Linear Compressor) are especially sensitive to the quality of the power supply. At a voltage lower 190 V they can go into emergency mode with short cycles.

2. Malfunction of the start-up protection relay: symptoms and diagnostics

The start-up protection relay is the “switch” of the compressor. If it is broken, the refrigerator will turn on for 1-3 seconds and turn off with a characteristic click. Reasons for relay failure:

• 🔥 The contacts are burnt due to overheating (often happens during power surges).
• 🧲 The core is jammed —the relay cannot keep the contact in the closed state.
• 🛠️ Mechanical wear (relevant for old type relays, for example, in Atlant XM-4021).

How to check the relay:

1. Unplug the refrigerator and remove the back cover (in most models the relay is mounted next to the compressor).
2. Carefully remove the relay from the compressor (usually it is held on by latches or one screw).
3. Test the contacts with a multimeter in resistance mode. There should be between the terminals 1–2 (winding). data-i="108">, between 20–50 Ohm, between 2–3 — open (infinity).

If the readings are different, the relay is faulty. Replacement will cost 800–2500 ₽ depending on the model. Indesit, Ariston or Beko a universal relay is suitable Danfoss 103N0210 or Embraco EGH 110.

What does a burnt relay look like?

Card on the contacts, melted plastic case, burning smell. Sometimes you can see that the core spring is deformed or. broken.

3. Problems with the compressor: when the motor “does not pull”

If the start-up relay is working, but the refrigerator still turns on and immediately turns off, the compressor itself may be to blame:

To diagnose the compressor:

1. Turn off the refrigerator and turn it with the back wall towards you.
2. Remove the start-up relay (as described above).
3. Ring the compressor windings:
   • Common point (C) — Starting (S): 20–30 Ohm.
   • Common point (C) — Working (R): 10–15 Ohm.
   • Starting (S) — Working (R): the sum of the two previous values (30–45 Ohm).

If the resistance between any terminals is equal 0 Ohm (short circuit) or infinity (open) - compressor defective. In this case repair is impractical: replacement will cost 8000–15000 ₽ (plus refilling with freon), which is comparable to the cost of a new budget class refrigerator.

4. thermostat or electronic control unit

In refrigerators with mechanical thermostat (for example, Biryusa 130 or Nord 242), a faulty thermostat may give false signals to turn off the compressor. In models with electronic control (LG GA-B489, Samsung RB-30 J3200, a fault may be to blame. firmware or sensor failure.

Symptoms of the problem:

• 🌡️ The refrigerator turns off immediately after starting, but the light inside is on.
• 🔄 An error flashes on the display (for example, E1, FF or rH y Samsung).
• 🔊 The compressor starts only after a manual reset (pulling the plug).

How to check thermostat:

1. Find the thermostat (usually it is hidden under the temperature knob or behind the front panel).
2. Remove the terminals and test the contacts 3–4 (in the “Off” position there should be an open circuit, when turning the knob to “Max” there should be a short circuit).
3. If the contacts are “stuck” or do not respond to turning the knob, the thermostat is faulty.

For electronic models:

• Try to do reset settings (usually hold the button Super Freeze + Fridge Temp for 10 seconds).
• Check temperature sensors (their resistance should change when cooling/heating).

⚠️ Attention: In refrigerators Liebeherr i Bosch with the system VitaFresh a sensor failure in the freshness zone can block the operation of the entire compressor. If the display lights F04 or F05 the sensor needs to be replaced.

5. Freon leak or clogged capillary tube

If the refrigerator turns on for a few seconds and then turns off within long pause (5-10 minutes), the reason may be lack of refrigerant or a clogged system. This leads to overheating of the compressor and activation of the thermal protection.

Signs of a freon leak:

• ❄️ The freezer compartment does not freeze well, and there is no frost on the back wall of the refrigerator.
• 🔥 The compressor becomes hot to the touch (normal: warm, but not scalding).
• 🕳️ Oil stains are visible on the tubes or in the soldering area (freon leaves along with the oil).

How check:

1. Turn off the refrigerator and defrost it for 12 hours.
2. Turn on the empty refrigerator to maximum mode. If the compressor runs for more than 5 minutes, the problem was freezing of the evaporator.
3. If the motor turns off again after a few seconds, you need diagnosis for leaks (it’s difficult to do this on your own, you need a vacuum pump and a pressure gauge).

Clogging capillary tube failure often occurs due to moisture entering the system (for example, after improper filling). In this case, the compressor will be buzz louder than usual, but will not provide cold. The solution is to clean the system or replace the capillary.

Do not turn on the refrigerator for more than 5 minutes|Check the integrity of the tubes by touch (for holes)|Call a technician with refilling equipment|Do not try to solder the tubes yourself (risk of fire!)

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6. Compressor overheating: when the refrigerator “suffocates”

The compressor may turn off immediately after starting due to overheating. This happens if:

• 🔥 The refrigerator is standing close to the wall or furniture (you need at least 5 cm gap for ventilation).
• 🧹 The condenser grille is clogged with dust (especially important for models No Frost).
• ☀️ The room temperature is higher 30°C (for example, in the kitchen in the summer or next to the stove).

How to check:

1. Unplug the refrigerator and let it cool 1-2 hours.
2. Use a vacuum cleaner or a brush to clean the condenser grille (it is located at the back or bottom).
3. Check the temperature of the compressor by hand after 10 minutes of operation. If it burns, the problem is in the cooling.

If the problem remains after cleaning, check condenser fan (in models with No Frost). It should spin when the compressor is running. If not, the fan motor may have burned out or the blades have jammed.

7. Other possible reasons and when to call a technician

If all previous checks did not produce results, the problem may be:

• 🔌 Faults plug or power filter (check the circuit from the plug to the compressor with a multimeter).
• 🛡️ Thermal fuse has tripped (it stands on the compressor and opens the circuit when overheated).
• 🔄 Failure of the inverter compressor (relevant for Samsung, LG, Haier).
• ⚡ Problems with the control board (often after power surges).

When you definitely need the help of a technician:

• If, when you turn on the refrigerator the RCD is triggered or knocks out the plugs.
• If the compressor smoke, sparks or smells like burning.
• If the display shows an error that cannot be reset (E4, FF, dH etc.).

Average repair cost:

⚠️ Attention: In refrigerators with linear compressors (LG) or inverter (Samsung) self-repair without diagnostic equipment can lead to complete failure motor failure. These systems are sensitive to unqualified intervention.

FAQ: Frequently asked questions about malfunction

❓ The refrigerator turns on for 1 second and clicks - is it the compressor or the relay?

In 70% of cases it is to blame start-protection relay. The compressor may be fine. To be sure, remove the relay and test it with a multimeter (as described in section 2). If the relay is working, the problem is in the compressor or power supply.

❓ Is it possible to replace the compressor yourself?

Technically yes, but this not recommended without experience. You will need:

• Special tool for soldering copper tubes.
• Vacuum pump for pumping out the system.
• Cylinder with freon and manometric manifold.

An error during replacement can lead to repeated breakdown or a refrigerant leak. The cost of a technician’s work (3000–5000 ₽) is often justified.

❓ Why does the refrigerator turn off immediately after defrosting?

This is typical for two cases:

1. Evaporator freezing (in models s drip system). Ice blocks air circulation and the compressor overheats.
2. Moisture entering the capillary tube after incomplete drying. This leads to congestion and protection activation.

Solution: defrost the refrigerator 24 hour with the doors open, then dry with a hairdryer (not hot air!).

❓ The refrigerator clicks, but does not turn on - what is this?

Most likely, it worked thermal protection of the compressor due to:

• Overheating (for example, after long work in the heat).
• An interturn short circuit in the motor winding.
• Faults in the starting capacitor (relevant for older models).

Allow the refrigerator to cool for 1-2 hours. If after this it does not start, check the relay and compressor.

❓ How much does it cost to diagnose a refrigerator at home?

Cost for a technician to visit:

• 500–1000 ₽ — basic diagnostics (without disassembly).
• 1500–2500 ₽ — full check with disassembling and testing the compressor.

In some services ("RemBytTekhnika", "A-Iceberg") diagnostics are free if you agree to have them repaired. Check the conditions before leaving master!