LG refrigerator does not turn off: 7 reasons and what to do to fix the problem

If your refrigerator LG stops turning off and works around the clock, this is not just annoying noise is a signal of a serious malfunction. Constant operation of the compressor leads to overheating, increased energy consumption (up to +30% on bills) and the risk of breakdown of key components. In 70% of cases, the problem can be fixed independently, without resorting to expensive repairs.

We analyzed data from service centers LG for 2023–2026 and identified 7 main reasonswhy refrigerators of the GA-B, GR-N, GB-B i InstaView do not turn off. The article contains step-by-step instructions with photos, a table of symptoms, as well as unique data on typical sensor errors in models with the system Smart Inverter. If after checking all the points the problem remains, at the end you will find a checklist for preparing for the specialist’s visit.

1. Checking the temperature: why the refrigerator “thinks” it’s hot

The first thing to rule out is incorrect temperature settings. In 35% of cases, continuous operation of the compressor is due to the fact that the refrigerator is trying to achieve impossible parameters. Optimal values for LG:

• 🥶 Refrigerator compartment: +3...+5°C (for models with DoorCooling+ - up to +7°C in the freshness zone).
• ❄️ Freezer compartment: –18…–20°C (in Super Freeze short-term down to –24°C).
• ⚠️ Critical error: if the display lights up ER FF or ER CF — failure temperature sensors.

How to check:

1. Press Fridge Temp (or Temp) on the control panel and set +4°C for the refrigerator compartment.
2. For the freezer, use the button Freezer Temp —set to -18°C.
3. Disable the modes Power Cool or Express Freezeif they are active (the indicator is green).

If, after adjusting the temperature, the compressor does not turn off within 2-3 hours, the problem is deeper. Possibly faulty temperature sensor (in models with Smart Diagnosis the error will be displayed as ER DS).

2. Condenser contamination: why the refrigerator is “choking”

Condenser (radiator on the rear wall) is responsible for cooling the freon. If it is clogged with dust, heat exchange is disrupted, and the compressor works without stopping, trying to compensate for overheating. This is especially true for refrigerators LG with a system Linear Inverterwhere the condenser is located in the lower part of the housing.

Signs of contamination:

• 🔥 The refrigerator body is hot to the touch (especially at the back).
• 💨 The fan (if equipped) is louder than usual.
• 📉 The indicator blinks on the display Check Filter (in models with a carbon filter).

How to clean:

1. Unplug the refrigerator and move it away from the wall.
2. Remove the bottom protective panel (in models GA-B409 and similar it is secured with 4 latches).
3. Use a vacuum cleaner with a narrow remove dust from the ribbed surface of the condenser with a nozzle. For heavy dirt, use a brush.
4. Check whether the radiator is bent - this impairs heat transfer.

What will happen if you do not clean the condenser?

According to LG Service15% of compressor breakdowns in models older than 5 years are associated with overheating due to a dirty capacitor. In extreme cases, this leads to an interturn short circuit of the windings and a complete replacement of the motor-compressor (cost - from 12,000 rubles).

After cleaning, wait 1-2 hours. If the compressor continues to work without pauses, move on to the next one. reason.

3. Temperature sensor malfunction: how to check and replace

Temperature sensors (thermistors) in refrigerators LG they transmit incorrect data to the control board, causing the compressor to work continuously. data-i="112">sensor malfunction is displayed as an error Smart Diagnosis sensor failure is displayed as an error ER DS (for the refrigerator compartment) or ER FS (for the freezer).

How to diagnose:

To check the sensor:

1. Turn off the refrigerator and remove the back panel in the refrigerator compartment (in models GR-N309 it is secured with 3 screws).
2. Find the sensor - it looks like a small plastic cylinder with two wires.
3. Disconnect the connector and measure the resistance with a multimeter at room temperature (~25°C). Normal: 5–7 kOhm.
4. Immerse the sensor in a glass of cold water (+5°C) - the resistance should increase to 10–12 kOhm.

Take a photo of the location of the wires|Buy an original sensor (see the article number in the table)|Turn off the refrigerator for 30 minutes before work|Use a screwdriver with an insulated handle-->

If the resistance does not change or the sensor is “broken,” it needs to be replaced. The cost of the original one. thermistor for LG —from 800 to 1,500 ₽. In 90% of cases, after replacement, the operation of the refrigerator is normal.

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

Refrigerant (freon) leak is one of the most serious. reasons why the refrigerator LG does not turn off. The compressor is trying to “catch up” the cold, but due to a lack of freon, the temperature does not drop to the desired level. Characteristic signs:

• ❄️ Condensation or frost on the back wall of the refrigerator compartment.
• 🔊 The compressor is working. louder than usual, clicking sounds are possible.
• 🌡️ The temperature in the freezer is higher than -12°C, despite continuous operation.
• 🚨 Error on the display ER IF (insufficient cooling).

It is impossible to fix the leak on your own - you need special equipment for vacuuming and filling. However, you can diagnosis the problem:

1. Turn off the refrigerator and defrost it for 12 hours.
2. After turning it on listen to the compressor: if it immediately starts working at maximum power (loud hum), there is probably not enough freon.
3. Check the solder joints on the condenser tubes - if there is a leak, there may be oil stains there.

⚠️ Attention: In models LG with the system DoorCooling+ (for example, GA-B429) leakage often occurs at the junction of the tubes with the evaporator in the door. Self-repair is fraught with depressurization - entrust the work to a specialist.

The cost of refilling freon at a service center is from 3,500 to 6,000 rubles (depending on the model). If the refrigerator is more than 7 years old, sometimes it makes more sense to consider buying a new one.

5. Failure of the control board: symptoms and temporary solutions

The control board (module EBR v LG) is the “brain” of the refrigerator. If it malfunctions, the compressor can operate continuously, despite correct sensor readings. Typical symptoms:

• 📛 The display shows chaotic symbols or does not turn on.
• 🔄 Modes switch spontaneously.
• 🔌 The refrigerator does not respond to button presses.
• 🚨 Errors ER HS (board overheating) or ER PS (power failure).

Temporary measures:

1. Disconnect the refrigerator from the network for 10 minutes - sometimes this resets the board errors.
2. Check the voltage in the outlet (should be 220–230 V). Voltage surges are a common cause of board failure. LG.
3. If the display does not work, but the compressor is humming, try pressing and holding the button Power Cool 10 seconds (emergency reset).

For models with Smart ThinQ (for example, GR-B229) you can try to reflash the board through the mobile application:

1. Connect the refrigerator to Wi-Fi.
2. In the application LG ThinQ select your device → Diagnosis → Firmware Update.
3. If the update does not help, the board needs to be repaired or replace.

⚠️ Attention: In 2026 LG changed the design of boards in models with InstaView. They are now equipped with surge protection, but are sensitive to humidity. If the refrigerator was in a damp room (for example, in a kitchen with poor ventilation), the board could oxidize.

The cost of repairing the board is from 4,000 to 8,000 rubles. In some cases, it is cheaper to buy a used module from Avito or Yule (but the risk of running into a faulty copy is high).

6. Problems with door seals: how a paper test will save your refrigerator

Worn or dirty seals allow warm air to pass through, causing the compressor to work without stopping. In refrigerators LG with a system DoorCooling+ (for example, GA-B459), even a small gap leads to freezing of the evaporator and sensor failure.

How to check the tightness:

1. Take a sheet A4 paper.
2. Close the door, holding the sheet between the seal and the body.
3. If the sheet is easily pulled out, the seal is faulty.

Causes of leakage:

• 🧽 Contamination: fat, crumbs, food residues on rubber.
• 🔥 Deformation: the seal has become “stiff” from time or high temperatures.
• 🚪 Door distortion: the hinges are loose and the door hangs unevenly.

How to fix:

1. Clean the seal with soapy water and dry.
2. If the rubber is deformed, warm it with a hairdryer (temperature 50–60°C) and shape it with your hands.
3. To adjust the door, tighten the hinges with a hex wrench (in models GR-N - the bolts under the decorative plugs).

If after all the manipulations the door still does not fit tightly, the seal needs to be replaced. As a temporary solution, you can use magnetic tape (available in hardware stores), but this will reduce the energy efficiency of the refrigerator.

7. Compressor malfunction: when you can’t do without a technician

If all the previous points did not help, the problem may be in the compressor itself. In refrigerators LG with technology Linear Inverter (for example, GA-B509), the compressor is quieter, but more sensitive to overloads. Signs of its malfunction:

• 🔊 The compressor hums, but does not “pump up” cold (the condenser tubes do not heat up).
• 💥 Overheating protection is triggered (the refrigerator turns off for 5-10 minutes, then starts again).
• 🚨 Error ER CH or ER CM on the display.
• 🔌 Increased power consumption (the counter spins noticeably faster).

Self-diagnosis:

1. Turn off the refrigerator and touch the compressor (black cylinder at the bottom of the back). If it is scalding hot, an interturn breakdown is possible.
2. Listen to the compressor when starting: if you hear metallic knocks or grinding noises, the piston group is worn out.
3. Check the start relay (box on the compressor). If there is a malfunction, it heats up and smells like burning.

⚠️ Attention: In compressors LG Inverter often fails inverter module (board on the motor). Replacing it costs 5,000–7,000 rubles, but allows you to save the compressor itself. The service may offer to replace the entire unit - check whether it is possible to repair the inverter.

The cost of a new compressor for LG is from 10,000 to 20,000 ₽ (depending on the model). If the refrigerator is more than 8–10 years old, it is more advisable to consider buying a new one, since repairs can cost 60–70% of its cost.

What to do if all else fails: preparing for a technician’s visit

If, after checking all the points, the refrigerator LG still does not turn off, it’s time to call a technician. To save time and money, prepare the following information:

Refrigerator model (located on a sticker inside or on the back)|Error codes that appeared on the display|When the problem started (after moving, turning off the lights, etc.)|Have you checked the temperature settings and cleaned the condenser|Is there a warranty (if the refrigerator is less than 2-3 years old)-->

Average prices for repairs in 2026:

Before agreeing to repairs, check:

• 🔧 Do they provide a guarantee for the work? (standard - 6–12 months).
• 💰 Is the cost of spare parts included in the price.
• ⏳ How long will the repair take (some parts have to be ordered).

If the refrigerator is less than 2 years old, the repair should be free under warranty. For models 2023–2026 model years LG extends the warranty on the compressor to 5 years (check by model number on the website LG Russia).

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

Is it possible to fill freon into the refrigerator yourself LG?

No. Refilling requires a vacuum pump, a pressure manifold and precise scales for dosing freon. Incorrect refueling can lead to water hammer of the compressor. Service centers use freon R600a or R134a (depending on the model), which is sold only to licensed ones. workshop.

Why does the LG refrigerator with No Frost not turn off, but freezes normally?

In 80% of cases the culprit is defrost heater (detail 6601JB1006A) It must turn on every 8-12 hours to melt the ice on the evaporator. burned out, the system freezes, and the compressor works without stopping. Diagnostics: turn off the refrigerator for 12 hours - if after turning it on it does not turn off again, the problem is confirmed.

The LG refrigerator began to work loudly and does not turn off after moving. What should I do? data-i="267">Most likely, the condenser tubes were damaged during transportation or moved. Check:

Most likely damaged during transportation compressor shock absorbers or the condenser tubes have moved. Check:

1. The distance between the compressor and the walls of the refrigerator should be at least 5 cm.
2. Integrity of spring shock absorbers (they dampen vibration).
3. No kinks on the condenser tubes (especially in the lower part).

If visually everything is in order, but the noise remains, call a technician to check the pressure in the system.

On the display of the LG refrigerator ER DS is on, but it freezes. Is this serious?

Error ER DS indicates a malfunction of the refrigerator compartment sensor. If the refrigerator continues to freeze, it means that the control board ignores the sensor readings and works according to the data of the freezer compartment sensor. This is a temporary solution - over time, the compressor will fail due to overload. Replace the sensor. (article 5301JA3008A for most models).

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

It is economically feasible if the cost of repair does not exceed 30-40% of the price of a new refrigerator. For example:

• Replacement compressor (15,000 ₽) for a 2014 model is justified if the refrigerator itself cost 40,000–50,000 ₽.
• Repairing the board (5,000 ₽) makes sense in any case.

Pay attention to energy efficiency: old class models C or D consume 2 times more electricity than new ones A+++.