The refrigerator does not turn off: what is broken and how to fix it

Did your refrigerator suddenly stop turning off and running around the clock with minimal pauses - or without them at all? This is not just an annoying noise, but a serious signal of a malfunction. Continuous operation of the compressor leads to increased wear of parts, increased electricity bills and the risk of complete equipment failure. In 80% of cases, the problem can be diagnosed independently - without calling a technician.

In this article we will look at why the refrigerator does not turn off: from a banal accumulation of ice in the freezer to critical breakdowns of the compressor. You will learn how to check the thermostat with a multimeter, determine a freon leak by indirect signs and when exactly it’s time to call a specialist. all possible reasons, for which the refrigerator does not turn off: from a banal accumulation of ice in the freezer to critical breakdowns of the compressor. You will learn how to check the thermostat with a multimeter, determine a freon leak by indirect signs, and when exactly it is time to call a specialist. We will pay special attention to models with the No Frost system - their diagnosis has nuances that are kept silent even in service centers.

We will immediately warn you: if your refrigerator hot on the sides and does not turn off, this is normal for most modern models (heat is removed through the condenser). But if the body evenly warm, but the motor runs without pauses, this is already a cause for concern.

1. Overload of products: when the refrigerator “chokes”

The simplest and most common reason for continuous operation is impaired air circulation inside the chamber. If you have recently filled the refrigerator to capacity with food or placed hot dishes, the compressor will work hard, trying to cool the volume.

This is especially critical for models with with one compressor (for example, Atlant MHM 2835 or Indesit DS 4160), where the freezer and refrigerator compartment are cooled sequentially. In such cases, the motor may not be switched off 12-24 hours in a row until the temperature stabilizes.

• 🍲 Hot food: even warm soup in a pan increases the compressor operating time by 2-3 times.
• 🥩 Dense load: if food blocks the ventilation holes (in models with No Frost), the cold is not distributed.
• 🧊 Ice in the freezer: a layer of snow 5 mm thick increases the load on the compressor by 20%.

⚠️ Attention: if after defrosting the refrigerator does not turn off again, but at the same time the freezer is working normally, and in the fridge compartment the temperature is higher than +5°C - most likely the fault is temperature sensor or the capillary pipeline is clogged.

2. Thermostat malfunction: how to check and replace

Thermostat (thermostat) - this is the “brain” of the refrigerator, which sends a signal to the compressor to turn on/off. If it breaks, the motor will run continuously or, conversely, not turn on at all. In 60% of cases of continuous operation, it is the thermostat that is to blame.

Signs of thermostat failure:

• 🔄 The refrigerator does not respond to changes in the position of the thermostat knob.
• ❄️ B too much ice forms in the freezer (if the model without No Frost).
• 🔥 The compressor is hot, but does not turn off even when the minimum temperature is reached.

How to check the thermostat with a multimeter:

1. Unplug the refrigerator and remove the thermostat protective cover (usually located next to the adjustment knob temperature).
2. Disconnect the wires from the thermostat (take a photo of the connection diagram!).
3. Switch the multimeter to resistance testing mode (200 Ohms).
4. Attach the probes to the thermostat contacts. At room temperature, there should be resistance. 0 Ohm (closed).
5. Place the thermostat in a container with cold water (+5°C). After 2-3 minutes, the resistance should become infinity (open).

What to do if the thermostat is faulty?

If the thermostat does not change resistance when cooling, it needs to be replaced. For models Samsung RL-34 or LG GA-B489 universal thermostats are suitable. K59-L2442 or Danfoss 077B6300. Cost - from 800 to 2500 rubles. Replacement takes 20-30 minutes and does not require special tools except a screwdriver.

⚠️ Attention: in refrigerators with electronic control (for example, Bosch KGE39XW2A or Siemens KG39NXB35) instead of a mechanical thermostat, temperature sensoris used. It is checked in the same way, but the resistance should change smoothly with temperature changes.

3. Freon leak: how to recognize and what to do

Freon is a refrigerant that circulates through the system and cools the chambers if a microcrack appears somewhere (most often in evaporator or condenser), the gas gradually evaporates, and the refrigerator stops turning off, trying to compensate for the loss of cold.

Signs of a leak freon:

• ❄️ The freezer does not freeze well, but the refrigerator compartment is warm.
• 🔊 The compressor runs louder than usual, but there are no pauses between cycles.
• 🧊 There is no condensation on the back wall of the refrigerator (in models with drip system).
• 🔥 The condenser (grid at the back) remains cold even after an hour of operation.

How to find a leak yourself:

1. Turn off the refrigerator and defrost it.
2. Inspect carefully evaporator (plate inside the freezer) for corrosion or oil stains (freon leaves along with the oil).
3. Check solder places tubes - cracks often appear there.
4. If you find oil or rust, this is the place of the leak.

⚠️ Attention: freon leak cannot be fixed by yourself - special equipment is required to evacuate the system and charge the refrigerant. If you find a leak, do not turn on the refrigerator - this will lead to failure of the compressor. Average cost of repairs (filling + soldering). — 3500-6000 rubles.

4. Compressor breakdown: when repairs are more expensive than a new one. refrigerator

If the compressor hums, but does not turn off, or the refrigerator not at all. cools, but the motor is running, most likely the problem is in it. Compressor breakdowns are of two types:

1. Interturn short circuit —the motor windings are damaged, the compressor overheats and runs without stopping.
2. Stuck piston —the compressor hums, but does not start (or runs jerkily).

How to check the compressor:

• 🔧 Turn off the refrigerator and remove the back cover.
• 🔍 Find the compressor (black “barrel” with tubes).
• 📊 Check the resistance of the windings with a multimeter:
  • The resistance between the contacts C-S (common winding - starting) should be 20-40 Ohm.
  • Resistance between C-R (total - working) - 10-20 Ohm.
  • Resistance between S-R (starting - working) - the sum of the two previous values.

If the resistance:

• 🔄 0 Ohm - short circuit.
• 🔚 infinity - winding break.
• 🔥 The values ​​are very different from the norm - interturn short circuit.

⚠️ Attention: if the compressor it gets very hot (it is impossible to hold your hand for more than 3 seconds), but the resistance of the windings is normal - the problem may be in start-up protection relay. Replacing it costs 1000-2000 rubles and takes 10 minutes.

5. Problems with the electronic control board

In modern refrigerators (for example, Samsung RB-30 J3200 or LG GA-M409 SQRZ) the electronic control unitis responsible for on/off cycles. If it fails, the compressor may operate continuously, and the display may show an incorrect temperature.

Symptoms of board failure:

• 📱 The display flashes, shows errors (E1, FF, rH - depending on model).
• 🔄 The refrigerator does not respond to button presses.
• 🔌 The compressor turns on and off immediately (or works without pauses).

What you can do yourself:

1. Disconnect the refrigerator from the network for 10 minutes - sometimes a “reboot” helps.
2. Check the voltage in the outlet - it should be 220-230 V. Voltage surges often damage the board.
3. Inspect the board for swollen capacitors or burnt tracks.

Check the voltage in the socket

Inspect the board for damage

Reset the settings (unplug for 10 minutes)

Check the connection of the wires to the board-->

⚠️ Attention: if there is one on the board darkened areas or a burning smell, it needs to be replaced. Repair (resoldering of elements) is possible, but does not guarantee long-term operation. The cost of a new board is from 4000 to 12000 rubles.

6. Clogged capillary pipe: when the cold “does not reach”

The capillary pipe is a thin copper pipe through which freon enters the evaporator. If it becomes clogged (for example, due to moisture or oil), the refrigerant cannot circulate normally, and the compressor works non-stop, trying to “push” freon.

Signs of a clog:

• 🧊 The freezer is freezing, but the refrigerator compartment is warm.
• 🔊 The compressor operates loudly, with “gurgling” sounds.
• 🔥 The condenser (grid at the back) is hot in only one place.

How to check the blockage:

1. Turn off the refrigerator and touch it capillary tube (thin copper tube going from the compressor to the evaporator).
2. If it is uniformly warm there is no blockage.
3. If cold at the inlet and hot at the outlet there is a blockage.

⚠️ Attention: if the blockage of the capillary tube is accompanied by constant humming of the compressor i lack of cold in the refrigeration chamber, do not delay repairs. Long-term operation in this mode will lead to burnout of the compressor windings.

7. Door seal: why tightness is more important than you think

If rubber on the door it is torn, deformed or simply does not fit well, warm air constantly enters the chamber. The compressor is forced to work non-stop to compensate for the heat gain. This problem is especially relevant for old refrigerators (ZIL, Minsk, Stinol 101).

How to check the seal:

• 🔍 Close the door and shine a flashlight along the rubber contour. If light is visible, the seal is broken.
• 📏 Check the rubber for cracks or peeling.
• 🧲 Do a test with a sheet of paper: close the door, holding the sheet between the seal and the body. easily pulled out - the rubber band is faulty.

How to restore the seal:

1. If the rubber band is simply dirty, wash it with soapy water and lubricate it with silicone grease.
2. If the seal is deformed, heat it with a hair dryer (60-70°C) and shape by pressing the door for 10 minutes.
3. If there are cracks or tears, replace the seal. For models Indesit or Ariston a universal rubber band is suitable. 58×4100 mm (cost - 1500-2500 rub.).

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

❓ The refrigerator does not turn off after defrosting - is this normal?

Yes, after defrosting, the compressor can work 2-6 hours without stopping until the temperature stabilizes. If after 6 hours the motor does not turn off, look for a malfunction (thermostat, freon leak or clogged capillary tube).

❓ Can the refrigerator not turn off due to the heat in the room?

Yes, if the room temperature is higher 30°C, the compressor works at its maximum capacity. In this case:

• Install the refrigerator away from the stove or radiator.
• Check the ventilation gaps. (should be 5-10 cm from the walls).
• Reduce the temperature in the chamber by 1-2 degrees.

If work has not returned to normal after a day, the problem is not the heat.

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

The cost depends on the reason:

Breakage	Repair price (rub.)
Replacement of the thermostat	1500-3000
Refilling freon	3500-6000
Repairing the control board	4000-12000
Replacing the compressor	8000-15000

❓ Is it possible to use the refrigerator if it does not turn off?

For a short time (1-2 days) - you can, but:

• ⚠️ The risk of compressor burnout increases 3 times.
• ⚠️ Food in the refrigerator compartment may spoil (the temperature will be unstable).
• ⚠️ The electricity bill will increase by 30-50%.

If the reason is not overload with products - turn off the refrigerator and call a specialist.

❓ Why does the new refrigerator work without stopping?

At first 24-48 hours this is normal - the equipment is adjusted to the mode. If the motor does not turn off longer:

• Check if the mode is turned on Super Freeze or Fast Cool.
• Make sure the door closes tightly (sometimes in new models the seal “rubs in” 2-3 days).
• Look in the instructions to see if continuous operation is a feature of the model (for example, in Liebert or Haier some modes require long-term operation of the compressor).