The refrigerator does not turn off after defrosting: 7 reasons and what to do

Have you defrosted the refrigerator, turned it back on - and it works non-stop, does not turn off and hums like a tractor? This problem is familiar to many owners of equipment older than 5 years, but can also occur in new models. Constant operation of the compressor not just annoying with noise: it leads to increased energy consumption, overheating of parts and the risk of breakdown. In 80% of cases, the cause can be eliminated on your own - without calling a technician.

In this article we will look at why the refrigerator does not turn off after defrosting: from a banal error when turning on to serious thermostat malfunctions or freon leaks. You will learn how all possible reasonsfor which the refrigerator does not turn off after defrosting: from a banal error when turning on to serious thermostat malfunctions or freon leaks. You will learn how to diagnose the problem by indirect signs (for example, by the temperature in the chambers or the sound of operation), what manipulations you can do yourself, and when it’s time to call a specialist. Let us separately dwell on the nuances for refrigerators No Frost, Atlant, Indesit and other popular brands.

Spoiler: if the refrigerator is started working non-stop immediately after defrosting and at the same time freezes too much (foods are covered with ice in a few hours), the thermostat or temperature sensor is most likely to blame. But when the compressor is humming, but the cooling is weak, this is already a symptom of a freon leak or a clogged capillary tube.

1. The refrigerator does not turn off due to improper assembly after defrosting

The most common reason is banal errors when turning it back on. Even experienced users sometimes forget to check the obvious points, due to which the equipment operates in emergency mode. Before disassembling the refrigerator or calling the technician, follow this checklist:

Pay special attention sealing gum on the door. After defrosting, it could be accidentally bent or dirty - because of this, warm air penetrates into the chamber, and the refrigerator tries to compensate for this by continuous operation. Checking the tightness is simple: close the door, hold a sheet of paper to the joint and try to pull it out. If the sheet comes out without effort, it’s time to clean or replace the seal.

Another common mistake is loading warm products immediately after switching on. The refrigerator needs 1-2 hours to reach operating temperature, and if you fill it with hot pots or bags from the store, the compressor will work hard. The same applies to modes Super Cool or Fast Freeze (in models Samsung, LG, Bosch): they need to be turned off manually after 2-4 hours of operation.

⚠️ Attention: If The refrigerator No Frost does not turn off and ice forms on the back wall in the freezer - this is a sign of a malfunction of the defrost system. Do not try to break off the ice with a knife: this will damage the evaporator and cause a freon leak.

2. Thermostat failure: how to check and repair

The thermostat (or thermostat) is the “brain” of the refrigerator, which monitors the temperature and commands the compressor to turn on/off. If it breaks or does not work correctly, the compressor will thresh without interruption. Signs of a thermostat malfunction:

• 🔹 The refrigerator freezes too much (food in the main chamber freezes, ice builds up on the walls)
• 🔹 The compressor does not turn off at all, but the cooling is weak (the temperature in the chambers is higher than normal)
• 🔹 There is no click when turning the thermostat knob (in mechanical models)
• 🔹 An error flashes on the display (for example, E1 or F2 in refrigerators Atlant or Biryusa)

To check the thermostat, do the following:

1. Unplug the refrigerator.
2. Remove the protective cover (usually it is secured with 2-4 screws at the back).
3. Find the thermostat - this is a small box with a tube going to the evaporator.
4. Disconnect the terminals and check the contacts with a multimeter in continuity mode. At room temperature, the contacts should be closed.

If the thermostat does not ring or does not open when cooling (try putting it in ice) for 10 minutes); do it yourself - only the price of the part (from 500 ₽). Indesit, Ariston And Stinol universal thermostats are suitable K59-L2442 or Danfoss 077B6 (check compatibility by model). Replacement will cost 1,500–3,000 ₽ including labor, if you do it yourself - only the price of the part (from 500 ₽).

3. Freon leak: signs and what to do

Freon is a refrigerant that circulates through the system and provides cooling. If a microcrack appears somewhere (for example, due to corrosion or mechanical damage), gas leaks and the refrigerator loses its ability to freeze normally. At the same time, the compressor works without stopping, trying to compensate for the deficiency. cold.

Signs of a freon leak:

• 🔧 The refrigerator hums, but does not freeze (or freezes very weakly)
• 🔧 The condenser (grid at the back) does not heat up
• 🔧 Oily stains are visible on the tubes or evaporator (freon comes out along with the oil)
• 🔧 In models No Frost the fan stops working (no air noise)

It is impossible to fix the leak yourself - you need a special tool for soldering and refilling freon. But you can check. assumption:

1. Turn off the refrigerator and defrost it completely.
2. Turn on the empty refrigerator for 1-2 hours.
3. Touch the condenser (grid on the back) - if it is cold, there is definitely no freon.

⚠️ Attention: If a leak occurs in the freezer (for example, due to damage to the evaporator when cleaning the ice), repairs will be more expensive - you will have to disassemble the internal unit. In refrigerators No Frost older than 10 years, this is often not economically feasible.

4. tubes: how to clean the system

The capillary tube is a thin channel through which freon enters the evaporator. Over time, it can become clogged with oil decomposition products, moisture or small particles. As a result, freon does not circulate normally, and the refrigerator operates without stopping, but cools poorly.

Symptoms. blockage:

• 🛠 The condenser (grid at the back) only partially heats up
• 🛠 The compressor is very hot, but the refrigerator hardly freezes
• 🛠 In the freezer the temperature is above -10°C, although the compressor does not turn off

You can clean the capillary tube at home, but this requires care. You will need:

1. Turn off the refrigerator and bleed off the freon (through the service port).
2. Disconnect the capillary tube from the filter drier.
3. Blow it with nitrogen under a pressure of 10–15 atm (you can use a car compressor with adapter).
4. Replace the filter drier (costs 300–800 ₽).
5. Fill the system with freon (a manometric manifold is needed).

If you are not confident in your abilities, it is better to call a specialist. The cost of cleaning and refilling is from 4,000 ₽. In refrigerators No Frost clogging is often accompanied by icing of the evaporator, so additional diagnostics of the defrost system will be required.

What will happen if you do not clean the capillary tube?

If you ignore the blockage, the compressor will wear out, which will lead to its overheating and failure. On average, a “dying” compressor will last 1–3 months, after which its replacement will cost 8,000–15,000 rubles (depending on the model).

5. Problems with the compressor: why it doesn’t turn off

The compressor is the “heart” of the refrigerator, which pumps freon through the system. If it is worn out or does not work correctly, two scenarios may occur:

1. The compressor does not turn off, but the refrigerator freezes weakly - this is a sign of loss of power (piston wear, valve jamming).
2. The compressor does not turn off and gets very hot - this may be an interturn short circuit in the winding or jamming rotor.

You can check the compressor like this:

• 🔌 Turn off the refrigerator and touch the compressor - if it is scalding hot, this is a bad sign.
• 🔌 Listen to the sound of operation: a normal compressor hums smoothly, without clicks or rattles.
• 🔌 Check the starting relay (box on the compressor) - if it crackles or smells like burning, it needs to be replaced.

If the compressor is burned out, replacing it will cost 8,000–15,000 ₽ (depending on the model). In refrigerators older than 10 years, this is often unprofitable - it’s cheaper to buy a new one. But before replacing, make sure that the problem is not in start relay (costs 500–1,500 ₽) or capacitor (300–800 ₽) - these parts break more often and are replaced in 10 minutes.

6. Malfunction of the No Frost system: why the refrigerator does not turn off

In refrigerators No Frost the continuous operation of the compressor is often responsible defrost system, which includes:

• 🌬 Evaporator (radiator where ice forms)
• 🌬 Defrost timer (gives a command to turn on the heater)
• 🌬 Heater (melts ice)
• 🌬 Defrost sensor (controls the temperature evaporator)

If any of these elements breaks, the evaporator freezes, air stops circulating, and the refrigerator works non-stop, trying to cool the chamber. Signs of a problem:

• ❄️ Ice is building up in the freezer (especially on the back wall)
• ❄️ The fan does not make noise (or makes intermittent noise)
• ❄️ The refrigerator hums, but not freezes

You can check it yourself:

1. Turn off the refrigerator and defrost it completely (24 hours).
2. Check whether the fan rotates manually (if not, it could have iced up or burned out).
3. Listen, it clicks is there a defrost timer when turned on (in models Samsung and LG it is located behind the back panel of the freezer).

If the problem is in the timer or sensor, replacing them will cost 2,000–4,000 ₽. A burnt-out heater (defroster) costs 1,500–3,000 rubles. In refrigerators No Frost over 8–10 years old, control board often breaks down—its repair or replacement will cost 5,000–10,000 rubles.

⚠️ Attention: In refrigerators No Frost with electronic control (for example, Samsung RL-60 or LG GA-B489), a program failure may simulate a malfunction of the defrost system. Before repairs, try resetting the settings: turn off the refrigerator for 10 minutes, then turn on and hold the button Freezer (or Fridge) for 10 seconds.

7. Additional reasons: from electrical to external factors

If all of the above reasons do not apply, check these points:

• ⚡ Network voltage: at low voltage (less than 200 V), the compressor wears out. Use a stabilizer.
• ⚡ Chamber overload: if the refrigerator is filled to capacity with food, the air does not circulate and the temperature rises.
• ⚡ Heat in the room: at temperatures above 30°C the refrigerator may not turn off. Move it away from the stove or radiator.
• ⚡ Malfunction of the temperature sensor (in models with electronic control). Checked with a multimeter.

In refrigerators with inverter compressor (for example, Hitachi, Panasonic) constant operation can be the norm - such models regulate power smoothly, without sudden shutdowns. But if the temperature in the chambers does not correspond to the norm, diagnostics are required.

If you live in a region with a hot climate, pay attention to climate class refrigerator (indicated in the passport). Models of class N (normal) are designed to operate at 16–32°C, and class T (tropical) - up to 43°C. When operating in unsuitable conditions, the compressor will work with overload.

FAQ: Frequently asked questions about a refrigerator that does not turn off

How long should the refrigerator work after defrosting before turning off?

Normally, the refrigerator works after defrosting and turning on 1-2 hours without stoppingto dial the desired temperature. Then the cycle should stabilize: 10–20 minutes of work, 20–40 minutes of rest (depending on the model and load). If the compressor does not turn off for more than 4-6 hours, this is a cause for concern.

Is it possible to use a refrigerator if it does not turn off, but freezes normally?

For a short time (1-2 days) it is possible, but this is fraught with:

• 🔋 Increased energy consumption (up to 2-3 times higher than normal).
• 🔥 Overheating of the compressor and the risk of its breakdown.
• ❄️ Icing of the evaporator (in models No Frost).

If the problem is not solved in 2-3 days, it is better to turn off the refrigerator and call a technician.

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

In new refrigerators this may be due to:

• 🆕 Default settings: check if the "Super Freeze" mode is turned on or "Eco".
• 🆕 Transport bolts: if they are not removed, the compressor operates with overload.
• 🆕 Defect: in rare cases, defective thermostats or compressors are encountered (contact the service at warranty).

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

Method 1: Set the thermostat to minimum (position "1" or "Min") If the compressor does not turn off within an hour, the thermostat is faulty.

Method 2: Turn off the refrigerator, remove the thermostat and put it in the freezer for 15 minutes. If after this the contacts do not open (checked with an indicator screwdriver), the part must be replaced.

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

It depends on type of breakdown and repair cost:

• ✅ If the problem is in the thermostat, relay or seal (repair up to 3,000 ₽) - it’s worth repair.
• ❌ If the compressor burns out or the control board needs to be replaced (repair from 8,000 ₽) - it’s cheaper to buy a new class refrigerator A+++ (savings on electricity will pay for the difference in 2-3 years).

Exception - rare models (for example ZIL or Minsk), where repairs can be justified by nostalgia.