The refrigerator does not work turning off: causes and solutions

Have you noticed that the refrigerator began to work without interruptions, and the motor is humming around the clock? This is not just annoying noise - continuous operation of the compressor it can lead to equipment breakdowns, excessive energy consumption and food spoilage. Normally, the unit should turn off for 10–20 minutes every hour, but if this does not happen, it’s time to sound the alarm.

In this article we will look all possible reasonswhy the refrigerator does not turn off - from trivial (for example, incorrectly set temperature) to serious (freon leak or failure of the control board). We will also tell step-by-step instructionshow to diagnose the problem yourself, and tell you in which cases you cannot do without a specialist. If your Indesit, Samsung, Atlant or a refrigerator of another brand suddenly stops “resting”, read on!

Spoiler: in 30% of cases the user is to blame (for example, they forgot to close the door or overloaded the chamber with food). Another 40% are breakdowns that can be fixed in 15 minutes at minimal cost. And only 30% require professional repairs. Let's find out which category your situation falls into.

1. The refrigerator does not turn off due to a violation of heat exchange

The most common reason continuous operation of the compressor is problems with heat dissipation. The refrigerator tries to cool the compartment to the set temperature, but cannot do this due to external factors. As a result, the motor wears out, and the products still deteriorate.

Check the following points:

• 🔥 Hot products. If you put freshly cooked soup or a pot of hot borscht in the refrigerator, the compressor will work without stopping until the temperature returns to normal. In modern models (LG DoorCool+, Samsung Twin Cooling) this can take up to 6–8 hours.
• ☀️ High room temperature. If the refrigerator is located next to the stove, radiator, or on the sunny side, it will physically not be able to cool to the required temperature. The norm for work is +16…+32°C.
• 🧊 Overloading of the freezer. Too much food (especially if it is tightly packed) interferes with air circulation. As a result, the sensors record an insufficiently low temperature, and the compressor does not turn off.
• 🚪 The door is not closed tightly. Even a small gap allows warm air to enter. Check the seal - if it is dirty or deformed, the refrigerator will work without interruption.

How to check the heat transfer?

1. Open the refrigerator and make sure that food does not block the ventilation holes (in models with No Frost they are usually located on the back wall).
2. Touch the condenser grille (it is located behind or below the refrigerator). If it is hot, this is normal, but if it burns your hand, it means that the heat is not being removed.
3. Look at the back wall inside the chamber. In refrigerators with a drip system (Atlant, Biryusa) there should not be a thick layer of ice. If there is ice, defrost the equipment.

2. Malfunction of the thermostat or temperature sensor

If the refrigerator does not turn off and does not freeze (or, conversely, freezes too much), the problem may lie in thermostat (in mechanical models) or temperature sensor (in electronic ones). These elements are responsible for controlling the climate inside the chamber. When they break, the compressor receives incorrect signals and works without stopping.

How to understand that the thermostat is to blame?

• 📉 The temperature in the refrigerator below -10°C in the main chamber or -24°C in the freezer (at normal +2…+5°C and -18°C respectively).
• 🔄 The compressor does not responds to changes in the position of the thermostat knob (in mechanical models MinsK, Stinol).
• ⚡ An error flashes on the display (for example, E1, F2 or H1 in refrigerators Bosch, OF v Samsung).

To diagnose the thermostat:

1. Disconnect the refrigerator from the network.
2. Remove the protective casing from the thermostat (usually it is located inside the chamber, next to the lamp).
3. Test the contacts with a tester. At room temperature there should be zero resistance (short circuit). faulty.

Disconnect the refrigerator from the mains

Find the sensor (usually in a plastic case on the back wall)

Measure the resistance with a multimeter (norm: 4–7 kOhm at +20°C)

Compare the readings with the table in the instructions

If the deviation is more than 20%, replace the sensor -->

If the thermostat is mechanical (as in ZIL or Donbass), you can replace it yourself - the part costs 500–1500 rubles. In electronic models (Liebert, Electrolux), the control board often fails, and here you will need a specialist.

What to do if the refrigerator with No Frost does not turn off?

In No Frost systems, temperature and defrost sensors often fail due to icing of the fan. If the refrigerator Samsung RB37 or LG GA-B489 works without stopping, try:

1. Turn it off for 12-24 hours to completely defrost. data-i="127">2. After turning on, listen - if the fan does not make noise, it means ice is blocking its blades.

2. After turning on, listen - if the fan does not make noise, it means ice is blocking its blades.

3. In this case, you need to replace the defrost sensor or heating element (defroster).

3. Freon leakage: signs and what to do. data-i="130">Freon is a refrigerant that circulates through the refrigerator system and provides cooling. If it occurs somewhere

Freon is a refrigerant that circulates through the refrigerator system and provides cooling. If it arose somewhere microcrack (for example, in the evaporator circuit or pipes), the gas gradually evaporates, working without interruption, but the temperature in the chamber still rises.

Signs of a freon leak:

• ❄️ The freezer compartment does not freeze well, and in the main chamber the temperature is above +10°C.
• 🕳️ On the back wall of the refrigerator (in models with drip system) there is no frost or it appears only in one corner.
• 🔊 The compressor runs louder than usual, but does not produce cold.
• 💨 The condenser (grid at the back) remains cold even after an hour of operation.

What to do?

Fix the leak yourself impossible - you need a specialist with equipment for vacuuming and refilling freon. However, you can check:

1. Is there oil stains on the floor under the refrigerator (freon circulates along with oil, and when there is a leak, it seeps out).
2. Is compressor winding damaged (sometimes leakage occurs through microcracks in the copper tubes next to the motor).
3. Wasn't it mechanical damage (for example, when transporting or cleaning ice with a knife).

Repair cost:

4. Compressor failure: when replacement is necessary

The compressor is the “heart” of the refrigerator. If it is worn out or broken, the motor may run continuously but not produce the required pressure for cooling. Most often this happens due to:

• ⏳ Natural wear (compressor service life is 10–15 years).
• ⚡ Power surges (if the refrigerator is not connected through a stabilizer).
• 🔥 Overheating (for example, if the refrigerator is in a hot room or the ventilation is blocked).
• 🛠️ Poor repair (if you previously charged freon without evacuating the system).

How to understand that the compressor is faulty?

• 🔊 The motor hums, but does not start (relay clicks are heard).
• 🌡️ The temperature in the chamber does not drop below +15°C even after 24 hours operation.
• 💥 Refrigerator knocks out the machine in the panel when turned on.
• 🔄 The compressor turns on for 5-10 seconds and immediately turns off (overheating protection is triggered).

For diagnostics:

1. Turn off the refrigerator and touch the compressor (black cylinder at the back). If it is scalding hot, this is a sign of an interturn short circuit.
2. Ring the windings with a multimeter:
   • Resistance between the terminals C-S (common and starting winding) - 20–40 Ohm.
   • Resistance between C-R (common and working winding) - 10–20 Ohm.
   • Resistance between S-R —the sum of the two previous values.

If the resistance is equal 0 (short circuit) or ∞ (open), the compressor must be replaced.

The cost of a new compressor is from 6,000 to 20,000 rubles (depending on the model). Replacement costs 3,000–5,000 rubles. For refrigerators older than 10 years, repairs are often unprofitable - it’s cheaper to buy a new one.

5. Problems with the control board

In modern refrigerators (Samsung RL38, LG GB-B459, Bosch KGN39) the compressor is responsible for the operation of electronic control board. If it fails, the motor may receive incorrect commands and run without stopping. Most often, the board breaks down due to:

• ⚡ Power surges (especially if the refrigerator is not connected through a surge protector).
• 💧 Moisture ingress (for example, when defrosting or washing the refrigerator).
• 🔥 Overheating (if the board is located next to the compressor without proper ventilation).
• 🐭 Damage by rodents (mice often chew wires).

Signs of a board malfunction:

• 📛 The display shows non-existent errors (for example, Er IF v Indesit or F5 v Atlant).
• 🔄 Refrigerator reboots on its own or resets settings.
• 🎛️ Buttons on the panel do not respond to pressing.
• 🕒 The compressor works without stopping, but the temperature in the chamber does not correspond to the set one.

What to do?

Independent repair of the board is almost impossible - soldering equipment and a refrigerator circuit are required. However, you can:

1. Unplug the refrigerator for 10–15 minutes (sometimes “rebooting” helps).
2. Check fuse on the board (usually a glass bulb with a metal thread inside) If it is burnt out, replace it with a similar one.
3. Inspect the board for darkened or swollen elements (capacitors, resistors).

The cost of a new board is from 3,000 to 15,000 rubles. Replacement costs 2,000–4,000 rubles. For budget models (Biryusa, Position), repairs may be unprofitable.

6. Clogged capillary tube or filter drier

The capillary tube is a thin channel through which freon enters the evaporator. If it clogged (for example, due to moisture or oil particles), the refrigerant is not available. can circulate normally. The compressor is working hard, but there is not enough cold. A similar problem occurs when the filter-drier is clogged filter drier - it retains moisture, but over time it can clog.

Symptoms blockage:

• ❄️ The freezer is working fine, but the refrigerator is not (or vice versa).
• 🕳️ The condenser (grid at the back) is only hot in one place.
• 🔊 The compressor is humming louder than usual, but cycles There are no on/off switches.
• 💧 On the back wall of the refrigerator appears oily liquid (this is oil from the system that cannot circulate).

How to remove the blockage?

This problem cannot be solved independently - requires professional cleaning or replacement of the capillary tube. The technician performs the following actions:

1. Pumps out the remaining freon from the system.
2. Purges the tube with nitrogen under pressure.
3. If cleaning does not help, install a new tube or filter drier.
4. Refills the system with freon.

Repair cost:

7. Additional reasons: from the fan to a faulty defrost sensor

If all of the above problems do not apply to your case, check these nuances:

• 🌀 Faulty fan (in models with No Frost). If it is broken, the cold is not distributed throughout the chamber and the compressor runs without stopping. Check whether the blade rotates when the door is open (or Samsung RB30 or LG GA-B429 it can be seen from the back).
• 🧊 Broken defrost sensorIn refrigerators. c No Frost it is responsible for turning on the heater, which melts the ice. If the sensor is faulty, the evaporator freezes and the compressor cannot cool the chamber.
• 🔌 Electrical problemsCheck whether the terminals on the compressor or thermostat are loose. oxidation of the contacts leads to malfunctions.
• 📏 Improper installationIf the refrigerator is not level, the door may not fit tightly. Use a level and adjust the legs.

Also. take into account features of specific models:

• T Atlant MXM often fails temperature relay - its replacement costs 800–1,200 rubles.
• The weak point is Indesit BIAA 13 weak point - the evaporator sensorwhich is located in the freezer.
• The Samsung RL-34 may fail inverter compressor —it requires flashing the board.

How to check the fan in the No Frost refrigerator?

1. Disconnect the refrigerator from the power supply.

2. Remove the back panel in the freezer. (usually it is secured with latches).

3. Manually rotate the fan blade - it should rotate easily, without squeaks.

4. Connect the refrigerator and listen: if the fan does not make noise, it means it is broken or blocked by ice.

What to do if the refrigerator does not turn off: step-by-step instructions

Before calling a technician, follow these steps:

Disconnect the refrigerator from the network for 1 hour (allows you to rest compressor)

Check that the door is tightly closed (put a sheet of paper - if it comes out easily, the seal is faulty)

Make sure that the room temperature is not higher than +30°C

Remove all food and defrost the refrigerator for 12-24 hours

Test the thermostat and compressor with a multimeter (if you have the skills)

Check for errors on the display (take a photo and look for the explanation in the instructions)-->

If after defrosting and checking the thermostat the problem remains:

1. Call the service center and describe the symptoms (preferably with a photo of errors on the display).
2. Check whether warranty (in some models Bosch i Siemens it is valid for up to 5 years on the compressor).
3. Compare the cost of repairs with the cost of a new refrigerator. If repairs cost more than 50% of the price of the equipment, it is better to buy a new one.

FAQ: Frequently asked questions about the continuous operation of the refrigerator

❓ The refrigerator works non-stop, but freezes normally. What to do?

Most likely, the problem is thermostat of the refrigerator compartment or temperature sensor. Also check that the compartment is not overloaded with food or that it is blocking the ventilation openings. In 80% of cases, replacing the thermostat helps (cost - 1,000–2,500 rubles).

❓ Why doesn’t the new refrigerator turn off on the first day?

This is normal! When you turn it on for the first time, the refrigerator (LG, Samsung, Atlant) works non-stop for 12–24 hours to reach the desired temperature. If after a day the compressor does not start to turn off, check the temperature settings (should be +2…+5°C in the refrigerator compartment and -18°C in the freezer).

❓ Is it possible to refill freon yourself?

No. To refill you need vacuum pump, pressure manifold a freon cylinder. Incorrect refilling can lead to compressor explosion or poisoning (freon is toxic). Contact a specialist.

❓ The refrigerator does not turn off after defrosting. What's the matter?

Probable reasons:

• There is still moisturein the chamber, which has frozen on the evaporator (defrosting needs to be repeated).
• Broken defrost sensor (in models with No Frost).
• Clogged drainage hole (water does not drain, and the refrigerator “thinks” that the door is open).

Check whether the door open indicator is on.

❓ How much does it cost to repair if the refrigerator does not turn off?

The cost depends on the reason:

• Replacement of the thermostat — 1,500–3 000 rub.
• Repair of the control board — 3,000–8,000 rub.
• Refilling freon — 3,500–6,000 rub.
• Replacing the compressor —8,000–15,000 rubles.

The technician will tell you the exact price after diagnostics.