The refrigerator does not turn off after defrosting: reasons and methods elimination

You defrosted the refrigerator, turned it back on - but it works non-stop, hums like a plane on takeoff and does not think of turning off? This situation is familiar to many owners of equipment older than 5 years. In 80% of cases, the problem is solved without calling a technician, but it is important to correctly determine its source.

In this article we will analyze 7 key reasonswhy the refrigerator does not turn off after defrosting - from a banal accumulation of ice to serious compressor breakdowns. You will learn how to diagnose a malfunction yourself, what manipulations you can do yourself, and when it is better to immediately call a specialist. We have also collected current data on models Indesit, Atlant, Samsung, LG and Boschwhere this problem occurs most often.

Spoiler: in half of the cases it is not the refrigerator itself that is to blame, but wrong user actions when defrosting. But first things first.

1. Violation of defrosting rules: 3 critical errors

The first thing you need to check is whether you have violated defrosting technology. Even modern refrigerators with No Frost system require periodic defrosting (albeit less often than drip models). Errors at this stage lead to the fact that the equipment begins to work in emergency mode.

Here are three most common mistakesdue to which the refrigerator does not turn off after switching on:

• 🔥 Using a hairdryer or hot water to speed up the process. A sudden change in temperature damages the seal and can damage the temperature sensor. As a result, the compressor receives false signals and operates without pauses.
• ❄️ Incomplete removal of ice in the freezer. If even small ice remains on the evaporator (especially in models Atlant MXM-1708 or Indesit DF 4180), the system “thinks” that the temperature has not reached the norm and drives the compressor to wear out.
• ⏱️ Turning on too quickly after defrosting. The refrigerator needs to remain turned off at least 15-20 minutes so that the pressure in the system stabilizes. If you turn it on earlier, the startup occurs in extreme mode.

If you made one of these mistakes, do not panic. In most cases, it is enough to repeat defrosting correctly:

Unplug and leave the doors open

Remove all food and shelves

Wait for the ice to melt naturally (do not use heaters!)

Wipe all surfaces with a dry cloth

Leave the refrigerator turned off for 30-40 minutes before turning it on -->

After proper defrosting, the equipment should return to the normal operating cycle (turning on/off every 20-30 minutes). If the problem persists, read on.

2. Clogged drainage system: when water interferes with cooling

In refrigerators with a drip defrosting system (Samsung RB-30 J3200, LG GA-B489 YQZL etc.), the drainage hole is often clogged with food particles, ice or mold. This leads to water accumulation under the drawerswhich then freezes and blocks normal air circulation.

How to understand that the blockage is to blame?

• 💧 There is water under the lower drawers, despite defrosting.
• 🧊 Ice quickly builds up on the back wall of the refrigerator.
• 🔊 The compressor is louder than usual, but the cooling is weak.

To fix the problem:

1. Turn off the refrigerator and remove all food.
2. Locate the drainage hole (usually at the bottom of the back wall of the refrigerator).
3. Clean it with a cotton swab or special brush (included with some models).
4. Rinse the system with warm water with the addition of baking soda (1 tablespoon per 1 liter of water).

After cleaning, let the refrigerator stand turned off 1-2 hours, then turn it on. If the compressor starts to turn off normally, the problem is solved.

3. Malfunction of the thermostat or temperature sensor

The thermostat (or thermostat) is the “brain” of the refrigerator, which controls the on/off of the compressor. If it breaks, the compressor either does not start at all or runs without stopping. In models with electronic control (Bosch KGN39XL20, Samsung RL-34 EBMG), a sensor is responsible for the temperature, which can also fail.

Signs of a thermostat failure:

• 🔄 The refrigerator does not respond to changes in the position of the handle thermostat.
• ❄️ Too much ice forms in the freezer (or, conversely, it is not cold enough).
• 🔊 The compressor runs continuously, but the temperature in the chambers does not correspond to the set temperature.

How to check the thermostat yourself?

1. Disconnect the refrigerator from the mains.
2. Remove the protective casing (in mechanical models it is usually located inside the refrigerator compartment, next to the lamp).
3. Find the thermostat - this is a small box with a tube filled with freon.
4. Carefully remove the terminals and check the contacts with a multimeter in the dialing mode calls.

How to dial a thermostat with a multimeter?

At room temperature, the thermostat contacts should be closed (resistance ~0 Ohm). If you place the thermostat in cold water (for example, with ice), the contacts should open (resistance → ∞). If this does not happen, the thermostat is faulty.

If the thermostat does not pass the test, it must be replaced. For models Atlant and Indesit universal thermostats K-59 or Danfoss 077B6are suitable, but it is better to check compatibility according to the refrigerator model.

⚠️ Attention: In refrigerators with electronic control (Samsung, LG, Bosch) temperature sensors are not always subject to separate replacement. Often it is necessary to replace the entire control unit, which costs 30-50% of the cost of a new refrigerator. Before purchasing spare parts, check this point with the specialist.

4. Freon leak: when the refrigerator “does not keep” the cold

Freon is a refrigerant that circulates through the system and provides cooling. If it appears somewhere microcrack (for example, in the evaporator circuit or at the joints of the tubes), freon gradually evaporates. The compressor tries to compensate for the loss of cold and works without stopping, but the temperature in the chambers still does not reach normal.

Signs of a freon leak:

• 🔥 The compressor is hot to the touch and does not turn off anymore 1-2 hours.
• ❄️ The freezer does not freeze well, the food thaws.
• 🔊 Hissing or gurgling appears in the system (especially noticeable when turned on).

Fix the leak yourself impossible - special equipment is required for evacuating the system and refilling with freon. However, you can preliminarily diagnose the problem:

1. Turn off the refrigerator and defrost it.
2. Inspect the back wall for signs oil stains (freon mixes with the compressor oil and leaves traces).
3. Check if the back wall in the area of the evaporator is swollen (this is a sign of corrosion of the tubes).

If you find signs of a leak, do not turn on the refrigerator —this may damage the compressor. It’s better to call a specialist right away. Average repair cost (refueling + leak repair) for models Atlant and Indesit — 3 500–6 000 ₽, for Samsung/LG — 5 000–9 000 ₽.

5. Compressor breakdown: when the motor works “to wear out”

The compressor is the “heart” of the refrigerator, and its breakdown often leads to continuous operation without shutdowns. Normally, the motor should start at 10-20 minutes, then rest. If it hums without a break, this may mean:

• 🔧 Interturn short circuit in the winding (the compressor heats up, but does not create the required pressure).
• 🛠️ Wear of the piston group (typical for refrigerators older than 10 years).
• ⚡ Problems with the starting relay (the compressor starts jerkily or does not start the first time).

How to check the compressor?

1. Turn off the refrigerator and touch the compressor (it is located at the bottom back). Normally, it should be warm, but not scalding.
2. If the compressor excessively hot (you cannot hold your hand for more than 2-3 seconds), this is a sign of overheating.
3. Listen to the sound of operation: knocking, grinding or vibration talk about mechanical wear.

If the compressor is faulty, it is usually repaired they do not repair, and replace it with a new one. The cost of a new compressor for refrigerators Atlant or Biryusa —from 4 000 ₽, for Samsung or LG —from 7 000 ₽. Please note that payment for the work of the technician will be added to this amount (2 000–4 000 ₽).

⚠️ Attention: If your refrigerator is more than 10 years old, replacing the compressor may not be profitable. Compare the cost of repairs with the price of a new refrigerator (for example, Atlant MXM 1705-100 costs about 20 000 ₽, and the repair will cost $ 10 000–12 000 ₽).

6. Problems with the electronic control unit

In modern refrigerators (Samsung RL-38 NESA, LG GA-B429 SLGL, Bosch KGE39AW20R) the electronic module is responsible for the operation of the compressor. If it fails, the equipment may behave unpredictably: it may not turn on, it will work without stopping, or it will display errors on the display (for example, E1, F2 or OF OF).

Causes of failure of the electronic unit:

• ⚡ Power surge on the network (especially relevant for houses with an old wiring).
• 💧 Moisture ingress to the board (for example, during defrosting or leakage from the drain).
• 🔥 Overheating due to poor ventilation (the refrigerator is located close to the wall).

How to diagnose the problem?

1. See if the display lights up. If it does not respond on button presses, the unit is faulty.
2. Check whether the error indicators are blinking (the codes for your model can be found in the instructions).
3. Turn off the refrigerator for 10-15 minutes, then turn it on again. If the problem persists, the unit needs to be repaired or replaced.

The cost of repairing the electronic module depends on the model:

In some cases, the unit is subject to reflashing (for example, in models Samsung with a system Digital Inverter) This is cheaper than replacement, but not all service centers undertake such work.

7. “suffocates”

If the refrigerator is in the wrong place or it the ventilation grilles are clogged with dust., the heat exchange is disrupted. The compressor is forced to work longer to compensate for insufficient cooling. Over time, this leads to the fact that it stops turning off at all.

What interferes with normal heat transfer?

• 🪟 The refrigerator is standing close to the wall (minimum 5 cm gap is required).
• ☀️ It is exposed to direct sunlight or it is standing next to the stove/battery.
• 🧹 The ventilation grilles on the back wall are clogged with dust or cobwebs.
• 🔌 In the socket low voltage (less 200 Q), due to which the compressor cannot reach full power.

How to fix it?

1. Move the refrigerator away from the wall by 5-10 cm.
2. Clean the back grill with a vacuum cleaner or brush.
3. Check the voltage in the socket with using multimeter (should be 220–230 V).
4. If the refrigerator is located next to a heat source, move it or install heat-reflecting screen.

If after eliminating these problems the refrigerator still does not turn off, then the problem is breakdown of internal components (see previous sections).

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

To avoid wasting time and money, follow this plan:

1. Check that defrosting is correct (section 1) If you make mistakes, repeat the procedure.
2. Clean the drainage system (section 2). This takes 10 minutes and often solves the problem.
3. Diagnose Thermostat/Sensor (section 3) If it is faulty, replace it.
4. Check the heat transfer (section 7). Make sure that the refrigerator is positioned correctly.
5. If all else fails - call a technician to check the compressor, freon leak or electronic block.

Do not delay repairs! Continuous operation of the compressor leads to it overheating and complete failure. building. On average, every hour of operation in this mode reduces the life of the refrigerator by 1-2 months.

⚠️ Attention: If your refrigerator is under warranty, do not disassemble it yourself this will void the warranty. Contact the brand's service center (Atlant, Indesit, Samsung etc. A list of official service centers can be found on the manufacturer's website.

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

How long should the refrigerator work without stopping after defrosting?

Normally, the refrigerator after defrosting and turning on should work from 30 minutes to 2 hours without stopping to reach the desired temperature. If after 2 hours the compressor still does not turn off, this is a cause for concern.

Exception: refrigerators with a system No Frost (Samsung RB-37 J5240, LG GA-B489 YVQLcan work longer - up to 3-4 hours, since they need to cool the entire ventilation system.

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

For a short time (1-2 days) - it is possible, but not recommended. Long-term operation without shutdowns leads to:

• 🔥 Overheating of the compressor and the risk of its breakdown.
• ⚡ Increased energy consumption (up to 2-3 times more usual).
• ❄️ Incorrect distribution of cold (food may freeze or, conversely, spoil).

If the refrigerator does not turn off for more than a day - turn it off and call a technician.

Why does a new refrigerator not turn off after the first defrost?

In new refrigerators (Bosch KGE36AW25R, Samsung RB-30 J3000) this may be due to:

1. Incorrect installation (for example, the refrigerator is not level and the door does not fit tightly).
2. Factory defective thermostat or sensor (relevant for the first batches of new models).
3. Transport lock of the compressor (in some models it must be removed manually after delivery).

Check whether the refrigerator is level and whether the door closes tightly. If the problem persists, contact the store for a replacement under warranty.

How to check if the thermostat is working without a multimeter?

If you do not have a multimeter, you can use the “folk” method:

1. Unplug the refrigerator.
2. Remove all products from refrigerator compartment.
3. Turn the thermostat knob to maximum cooling.
4. Place in the chamber thermometer (for example, for an aquarium).
5. Turn on the refrigerator and wait 1-2 hours.

If the temperature drops below +4°Cand the compressor does not turn off, the thermostat is faulty. If the temperature has not changed, the problem may be in the compressor or a freon leak.

Is it worth repairing a refrigerator that is older than 10 years if it does not turn off?

It depends on specific breakdown and the cost of repair. Focus on these criteria:

Type of breakdown	Repair cost, ₽	Recommendation
Replacement thermostat/sensor	1 500–3 000	👍 Worth repairing
Cleaning the drainage	500–1 500	👍 Worth repairing
Replacing the compressor	7 000–12 000	⚠️ Compare with the cost of a new one refrigerator
Freon leak + refill	4 000–8 000	⚠️ If the refrigerator is in good condition, it is worth it, otherwise not
Replacement of the electronic unit	5 000–12 000	❌ Usually unprofitable

If the amount of repair exceeds 50% of the cost of a new refrigerator (for example, Atlant MHM 1705-100 costs ~20 000 ₽), it is better to consider purchasing new equipment.