The refrigerator does not turn off and works without break: 10 reasons and what to do

If your refrigerator stops turning off and works around the clock without pauses, this is not just an annoying noise - it is a signal of a malfunction that can lead to serious breakdowns and increased energy consumption. Normally, the compressor should turn on for 10–20 minutes and rest for about the same amount of time, maintaining the set temperature. Continuous operation not only shortens the service life of the equipment, but also threatens motor overheating, icing of the evaporator, or even a fire due to network overload.

In this article we will analyze all possible reasonswhy the refrigerator does not turn off - from trivial (incorrect settings) to critical (thermostat failure or freon leak). You will learn how to diagnose the problem yourself without calling a technician, what measures can be taken right now, and in what cases it is dangerous to delay repairs. We will also provide a checklist for a quick check and answers to frequently asked questions from users.

1. The first thing you need to check: external factors

Before disassembling the refrigerator or calling service, exclude obvious causes not related to breakdowns. Often the problem lies in improper operation or external conditions.

• 🔌 Power and socket: Make sure that the refrigerator is connected to a working outlet without power surges. Try reconnecting it to a different outlet - sometimes the plug or contacts oxidize, which leads to unstable operation.
• 🌡️ Room temperature: If the room is hotter than +30°C, the compressor is forced to work almost non-stop to maintain the cold. This is especially true for models with climate class N (normal, up to +32°C) or SN (subnormal, up to +38°C).
• 🚪 Frequent opening of the door: In families with children or with active use, the refrigerator may not keep up restore temperature. Check whether the door closes tightly - perhaps the seal is worn out or the dishes are in the way.
• 🍲 Hot foods: If you recently put a pot of hot soup in the refrigerator, the compressor will work longer than usual. Modern models (for example Samsung RB30A32N0SA or LG GA-B489YQQZ) have a quick cooling function that temporarily blocks shutdown.

If external factors are normal, but the refrigerator still does not turn off, proceed to diagnosing internal systems.

2. Malfunctions of the thermostat (thermostat)

The thermostat is the “brain” of the refrigerator, which controls the temperature and sends a signal to the compressor to turn on/off. If it breaks down, the motor can work continuously, since it does not receive a command to stop. In 60% of cases of continuous operation, it is the thermostat that is to blame, especially in refrigerators older than 5-7 years (for example, Atlant XM-4021-000 or Indesit DF 4180 W).

How to check the thermostat yourself:

1. Unplug the refrigerator and remove all the food.
2. Find the thermostat - usually it is located next to the light lamp or on the back wall (in models with electronic control it can be built into the circuit board).
3. Remove the protective casing and carefully remove the thermostat. there should be 3-4 wires and an adjusting screw.
4. Test the contacts with a multimeter in resistance mode. At room temperature, between terminals 3 and 4 there should be a resistance of ~0 Ohms (closed), and between 1 and 2 - infinity (open).

If during testing the contacts do not close/open or the resistance does not change. when you turn the adjustment knob, the thermostat is faulty and requires replacement. The cost of a new thermostat for popular models (Biryusa 132K, Stinol RF 305) is from 800 to 2,500 rubles.

3. Problems with the compressor: why it does not turn off

The compressor is the “heart” of the refrigerator, which pumps freon through the system. If it is worn out or operating at maximum power, it may not turn off. due to:

• 🔧 Interturn short circuit in the winding - the motor overheats and cannot stop.
• 🛠️ Stucking piston - the compressor hums, but does not create the required pressure, so the thermostat does not register cooling.
• 💥 Failure of the starting relay —the motor turns on, but cannot complete the cycle correctly.

How to diagnose a compressor malfunction:

1. Turn off the refrigerator and listen: if after turning off you hear a hissing sound (pressure bleed), the compressor is most likely working.
2. Touch the compressor housing (it is located in the lower part of the back) - if it is scalding hot, this is a sign of overheating.
3. Check the start relay: remove it and shake it - if you hear knocking or rattling, the relay is faulty.

If the compressor does not turn off and gets very hot, it must be replaced. In models with inverter compressors (Samsung RB37J5230SA, LG GB-B399SLQZ), the breakdown is often associated with the electronic control board - in this case, diagnostics are required at a service center.

What will happen if the compressor is not repaired?

If you ignore the problem, the motor may completely burn out, which will lead to a freon leak and a complete replacement of the refrigeration unit. In the worst case, overheating of the compressor causes a fire.

4. Freon leak or clogged capillary tube

Freon is a refrigerant that circulates. through the system and cools the chambers. If it leaks through microcracks or the tubes are clogged, the refrigerator cannot reach the desired temperature and runs without stopping. Signs of a leak:

• ❄️ The condenser (grid at the back) remains cold, although the compressor is running.
• 🧊 There is little frost in the freezer or no cold at all.
• 🔍 Oil stains are visible on the back wall (freon leaks out along with the oil).

It is impossible to fix the leak yourself - special equipment is required to evacuate the system and refill freon. However, you can check:

1. Inspect. the back wall for corrosion or damage to the tubes (especially in the soldering areas).
2. Check whether the fan in the freezer is blowing (in models No Frost type Bosch KGN39XL30R) If the blades are not in place, the winding may be broken or clogged.

The average cost of repairs for a freon leak is from 3,500 to 7,000 rubles (including refilling and replacing the filter-drier). In refrigerators older than 10 years, it is more advisable to consider purchasing new equipment.

5. Breakdown of the electronic control board

In modern refrigerators with a display and touch screens. buttons (Liebherr CNef 4815, Electrolux ENN 2853 AOW) the electronic board is responsible for the operation of the compressor. If it fails, the motor can receive false signals and work without stopping. Causes of board failure:

• ⚡ Power surges in the network (especially if the refrigerator is not connected through a stabilizer).
• 💧 Moisture or condensation on the contacts.
• 🔥 Overheating due to poor ventilation (if the refrigerator is close to the wall).

How to check the board:

1. Turn off the refrigerator and remove the back cover (in some models the board is located under the top panel).
2. Inspect the board for blackened or swollen elements (capacitors, resistors).
3. Check the fuses (if any) - they may blow during a power surge.

If you do not understand electronics, do not try to repair the board yourself - this may lead to a short circuit. Contact the service, where they will test it on a stand. The cost of board repair is from 2,000 to 5,000 rubles, replacement - up to 10,000 rubles.

Inspect the board for visual damage

Check the fuses with a multimeter

Make sure there are no errors on the display (type codes E1, F2 etc.)

Ring the power circuit for an open circuit -->

6. Temperature sensors and the No Frost system

In refrigerators with a system No Frost (for example, Samsung RL38TEDBSA, BEKO GNE 114620 X) temperature sensors and a defrost timer are responsible for turning off the compressor. If they fail, the compressor runs continuously, and ice may build up on the back wall.

How to check the sensors:

1. Locate the sensors - they are usually located in the freezer (behind the back panel) and in the refrigerator compartment.
2. Disconnect the sensor connector and measure its resistance multimeter. At room temperature (~20°C) it should be within 5–7 kOhm (for exact values, see the technical documentation of the model).
3. If the resistance is 0 or infinity, the sensor is faulty.

Also check defrost timer (in models with electromechanical control). It should make a slight click when you turn the handle - if there is no click, the timer must be replaced.

7. When. call a technician: signs of serious damage

Some malfunctions require professional intervention. Immediately turn off the refrigerator and call a specialist if:

• ⚡ The compressor gets very hot (the housing burns your hand) and makes uncharacteristic sounds (knocking, grinding).
• 🔥 There is a smell of burning or smoke coming from the back of the refrigerator.
• 💧 There is a puddle of oil on the floor under the refrigerator (a sign of depressurization of the system).
• ❌ The display shows an error that cannot be reset (E5, F1 etc. etc.).

Also, do not postpone repairs if:

• The refrigerator does not turn off already more than a dayand the temperature in the chambers does not drop below +10°C.
• On the back frost or ice has appeared on the wall (in models No Frost this is a sign of a malfunction of the defrost system).
• After manual shutdown, the compressor does not start again.

⚠️ Attention: If the refrigerator does not turn off and the body is electrocuted, immediately unplug it and do not turn it on until checked by an electrician. This may be a sign of breakdown of the insulation on the housing - a high risk of electric shock.

8. Prevention: how to avoid breakdowns in the future

To ensure that the refrigerator lasts longer and does not work without stopping, follow simple rules:

• 🧹 Regularly defrost refrigerator (even if it has a system No FrostIt is enough to turn it off 1-2 times a year for 12-24 hours to dry.
• 🔌 Use a voltage stabilizer, especially if there are frequent power surges in your area.
• 📏 Keep the gaps: there should be at least 5 cm between the refrigerator and the wall for air circulation.
• 🧴 Do not overload the door heavy bottles - this leads to distortion and loss of seal.
• ☀️ Do not place the refrigerator next to a stove, radiator or windowthat is exposed to direct sunlight.

Also check sealing rubber on the door - if it has lost elasticity, replace it. The cost of a new seal for popular models is from 800 to 2,000 rubles.

⚠️ Attention: If your refrigerator is over 15 years old, repairs can cost 50–70% of the cost of new equipment. In this case, it is more advisable to consider purchasing a modern model with an energy consumption class A+++ —it will pay for itself due to energy savings.

FAQ: Frequently asked questions about refrigerators that do not turn off

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

For a short time (1-2 days) it is possible, but this is fraught with overheating of the compressor and increased energy consumption. If the problem is not solved within a day, turn off the refrigerator and move the food to a cool place (for example, on the balcony in winter) or in a cooler bag.

Why does a new refrigerator work without stopping in the first days?

This is normal - after the first turn on, the refrigerator needs 12-24 hours to get into working mode. and set the desired temperature. If after a day it still does not turn off, check the settings or contact the store (there may be a factory defect).

How to reset the error on the display due to which the refrigerator does not turn off?

In most models, the error can be reset by simultaneously pressing the buttons Super Cool and Super Freeze for 5-10 seconds. If the error appears again, diagnostics are required. In refrigerators LG to reset, sometimes you need to turn off the power for 1-2 minutes.

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 rubles.
• Repair of the control board - 2,000-6,000 rubles.
• Refilling freon - 3,500-7,000 rubles.
• Replacement compressor - 5,000–12,000 rubles.

In regions, prices may differ by 15–20%.

Is it possible to fill the refrigerator with freon yourself?

No. To refill, you need a vacuum pump, a manometric manifold and a cylinder with a specific brand of freon. (for example R600a or R134a). Incorrect filling can lead to an explosion or poisoning (freon is toxic in high concentrations).