LG refrigerator works without stopping: what to do and how to fix

If your refrigerator LG works without stopping, it hums like a plane on takeoff or does not turn off at all for days is not just an irritating noise, but a signal of a serious malfunction. Continuous operation of the compressor leads to increased wear of parts, power surges in the network and the risk of unit breakdown. In the worst cases, this can result in expensive repairs or even the purchase of a new refrigerator.

In this article we will analyze all possible reasons. data-i="61">diagnose the problem yourselfthe types of refrigerators. data-i="56">(including models LG (including models No Frost, Inverter Linear Compressor and classic drip) can work without interruption. You will learn how diagnose the problem yourselfwhich settings to check first, and when to immediately call a technician. We will also give unique recommendations for temporarily reducing the load on the compressorif repairs are delayed.

Important: refrigerator operation algorithms LG depend on the model and year of manufacture. For example, inverter compressors (Linear Compressor) initially work longer than classic ones, but still work longer than classic ones. should be turned off. If your equipment was manufactured before 2018, some of the tips may not work - check the details in the instructions for the specific model.

1. Check the basic settings: temperature and mode

Before disassembling the refrigerator or looking for breakdowns, make sure that the problem is not due to incorrect settings. 30% of cases continuous operation of the compressor.

Let's start with the temperature. The optimal values for LG:

• 🥶 Refrigerator compartment: +3...+5°C (in models with a freshness zone Fresh Balancer - up to +2°C).
• ❄️ Freezer compartment: –18…–20°C (for long-term storage of meat - up to –24°C).

If you set –25°C in the freezer or +1°C in the refrigerator, the compressor will work almost without stops, trying to achieve unrealistic values.

How to check:

1. Press the Fridge (or Temp) button on the control panel.
2. Make sure that the display shows the correct values (not flashing or are reset).
3. In models with touch controls (LG InstaView, Door-in-Door), press the button Express Freeze for 3 seconds - this will reset the temporary modes.

Another common mistake is the activation of special modes:

• ⚡ Express Freeze / Power Freeze: accelerated freezing (turns off automatically after 50 hours, but sometimes freezes).
• 🌿 Eco Mode: should reduce energy consumption, but in some models LG 2019–2021 it causes sensor failure.
• 🏠 Vacation Mode: if turned on, the refrigerator works only for the freezer, and the main chamber turns off (it may seem that the equipment “does not turn off”)

Turn off modes Express Freeze/Power Freeze|Reset Eco Mode (if activated)|Check the temperature in both chambers|Make sure the door is tightly closed (no signal Door Open on the display)

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2. Diagnosis of the seal and tightness

A damaged door seal is one of the most insidious reasons for continuous operation. The refrigerator LG “thinks” that the door is open and tries to compensate for the inflow. warm air, driving the compressor without interruption. In this case, visually the cracks may not be visible!

How to check the tightness:

1. Take a sheet of A4 paper.
2. Close the door, holding the sheet between the seal and the body.
3. Pull the sheet towards you. If it easily slipped out the seal is worn out. Normally it should hold with force.

Check this way all four sides doors (especially the bottom one - it accumulates there) Dirt). seal.

Signs of problems with the seal:

• 💧 Condensation on the walls of the refrigerator (even if No Frost).
• 🍂 Leaves, dust or crumbs in the seal grooves.
• 🔊 Extraneous sounds (whistle, hiss) when closing the door.
• 🧊 Ice on the back wall (in drip models).

Once a month|Once every 3-6 months|Only when I notice dirt|Never cleaned|I don’t know what is it-->

If the seal is really worn out:

• 🧼 Try clean it with a soap solution and lubricate it with silicone grease (for example, WD-40 Specialist).
• 🔧 In models LG with a magnetic seal (DoorCool+), check if the magnets are loose - they can be glued with superglue.
• 🛒 If the damage is serious (cracks, deformation), replace the seal. data-i="125">original ones are suitable LG fit original AGM73146601 (for two-chamber) or AGM73146602 (for Side-by-Side).

How to temporarily improve the tightness without replacing the seal

If the seal is deformed in only one place (for example, in the corner), you can put it under it a strip of foam rubber or rubber 2–3 mm thick. This will help for 1–2 months, but does not solve the problem completely.

3. Clogging of the No Frost system or drip evaporator

Refrigerators LG with system No Frost (models GR-B207*, GR-N242* etc.) and drip defrosting (GR-399SQ*) require regular cleaning of the ventilation ducts. If they are clogged with ice or dust, the compressor wears out, trying to pump cold through the blockage.

Symptoms. blockage:

• ❄️ Frost on the back wall (even in No Frost).
• 🌬️ Weak air flow from the ventilation holes.
• 🔊 Increased hum of the fan (as if it is “choking”).

How to clean the system No Frost:

1. Unplug the refrigerator and defrost it at least 12 hours.
2. Remove the back panel in the freezer (unscrew the screws Torx T20).
3. Clean the evaporator and ice fan with a plastic shovel (not metal!).
4. Vacuum the drainage hole (usually at the bottom of the back wall).

For drip models (LG GR-399*, GA-B489*):

• 💦 Check the drainage hole in the refrigerator compartment (on the back wall). If it is clogged, water accumulates and freezes, blocking air circulation.
• 🧴 Clean it with a cotton swab or syringe with warm water.

4. Malfunctions of sensors and electronics

If the refrigerator LG works without stopping, but all settings and seals are in order, temperature sensors or control boardsis to blame. In models with an inverter compressor (Linear Compressor), an electronics failure can lead to compressor freezing in maximum power modewhich leads to overheating and breakdown in 1-2 days.

Symptoms of sensor malfunction:

• 📉 The temperature in the chambers does not correspond to the set one (for example, +10°C at the set +4°C).
• 🔄 The display shows errors: Er IF (freezer sensor), Er rF (refrigerator sensor), Er dH (door sensor).
• 🔌 The refrigerator turns off only after the plug is pulled out.

How to check the sensors yourself:

1. Unplug the refrigerator.
2. Remove the cover at the top of the chamber (usually secured with latches).
3. Find the sensors (small plastic boxes with wires). In models LG there are usually two of them: one in the refrigerator compartment, the other in the freezer.
4. Carefully disconnect the connector and check the resistance with a multimeter (at room temperature it should be ~5–7 kOhm).

If the sensors are working, the problem may be in control board. Signs: control board responds to button presses.

• 💥 The refrigerator turns on and immediately turns off (cyclically).
• 🔥 Smells like burnt plastic (especially in models with a display on the door).
• 📵 Does not respond to button presses.

In this case not allowed trying to repair the board yourself - this may lead to a short circuit. Contact the service center LG (warranty for electronics is up to 5 years in some models).

What to do if a refrigerator LG with an inverter compressor is stuck in maximum power mode?

Immediately unplug it from the network for 10-15 minutes. If after turning on the compressor does not turn off again, call a technician. Operating in this mode for more than 24 hours is guaranteed to lead to compressor breakdown (replacement cost starts from RUB 15,000).

5. Problems with the compressor and refrigerant

If the refrigerator LG works without stopping, but does not freeze (or freezes weakly), the problem may be freon leakage or compressor wear. These are serious breakdowns that are almost never repaired without calling a technician.

Signs of problems with the compressor:

• 🔊 The compressor hums louder than usual (like a transformer booth).
• ⏱️ Works for more than 20-25 minutes without pauses (normal cycle: 8-15 minutes of work, 5-10 minutes of rest).
• 🧊 The freezer is covered with a “snow coat”, and the refrigerator compartment hardly cools.
• 💨 The refrigerator body gets very hot (especially from the bottom back).

What you can do yourself:

• 🔌 Turn off the refrigerator for 1-2 hours, then turn it on again. Sometimes this helps to “unblock” the compressor.
• 🧲 Check whether metal objects are attracted to the compressor housing (a sign of an interturn short circuit).
• 📏 Measure the compressor current with clamps (should be in the range of 0.5–1.2 A for inverter models).

Repair cost:

• 🔧 Compressor replacement: 8,000–20,000 ₽ (depending on the model).
• 💨 Refilling with freon: 3,500–6,000 ₽.
• 🔍 Leak diagnostics: 1,500–2,500 ₽.

⚠️ Attention: If your refrigerator LG is under warranty (usually 1–2 years for a compressor, up to 10 years for some inverter models), do not open the case on your own. This will void the warranty. Contact an authorized service center - repairs may be free.

6. External factors: room temperature, network load

Sometimes the refrigerator LG works without stopping due to external conditions, and not internal breakdowns. Let's check the most common scenarios:

Temperature in the room:

• 🌡️ If the room is hotter than +30°C, the compressor will work almost constantly, trying to compensate for the heat. This is normal for the summer period, but harmful for equipment.
• ❄️ If the temperature is below +16°C (for example, on an unheated loggia), the oil in the compressor thickens and it may not turn off.

Solution: move the refrigerator to a room with a temperature of +18...+25°C or set the climate class SN-T (for hot rooms) in the settings, if it is supported.

Network overload:

• ⚡ If the refrigerator is connected through an extension cord or “pilot” with other appliances (microwave, kettle), voltage surges can disrupt the operation of the electronics.
• 🔌 In rural areas or old houses, low voltage (less than 200 V) causes the compressor to work longer.

Solution: connect the refrigerator directly to the outlet and use a voltage stabilizer (for example, Resanta ACH-1000/1-C).

Incorrect installation:

• 🏠 If the refrigerator is too close to the wall (less than 5 cm), the ventilation grilles overlap and the compressor overheats.
• ☀️ Direct sunlight on the case increases the load on the cooling system.

Solution: move the refrigerator from the wall 7-10 cm and make sure that the sun does not shine on it.

In the kitchen away from the stove|Next to the stove or oven|In the hallway or hallway|On a loggia or balcony|In another room-->

7. When to call a technician: criteria and cost of repair

If you have tried all the tips above, but the refrigerator LG still works without stopping, it’s time to contact the professionals. Here precise signsthat you need the help of a specialist:

• 🔧 The compressor operates for more than 24 hours without pauses, and the temperature in the chambers does not drop below +10°C.
• 💥 The display lights up errors Er FF, Er CF, Er HS (fan, compressor or sensor malfunction, respectively).
• 🔌 The refrigerator turns off 1-2 seconds after turning on (a sign of a short circuit).
• 🧊 An “ice block” thicker than 3–4 cm.

Average prices for refrigerator repairs LG in 2026:

Where to look for a technician:

• 🛠️ Official service LG: warranty repairs, original spare parts, but 20–30% more expensive.
• 👨‍🔧 Private workshops: cheaper, but check reviews and availability of spare parts LG.
• 🏠 On-site repair: convenient, but the cost may increase by 1,000–2,000 rubles per visit.

⚠️ Attention: If your refrigerator LG is under warranty, do not agree to repairs from unofficial services. The company may refuse further warranty service. Always request certificates of work performed and receipts for spare parts.

8. Temporary measures: how to reduce the load on the refrigerator before repair

If repairs are postponed, but the refrigerator LG continues to work without stopping, use these tips to extend the life of the compressor and avoid breakdown:

• ❄️ Defrost the refrigerator completely (minimum 12 hours). This will relieve the load on the system.
• 🧊 Reduce the amount of food in the freezer - every kilogram increases the compressor operating time by 5-10%.
• 🌡️ Increase the temperature in the refrigerator compartment to +6...+7°C (temporarily).
• 🔌 Disable the function Ice Maker (if any) - it increases the load by 15-20%.
• 🚪 Minimize door opening — each time you open the compressor turns on 3-5 minutes longer.

If the refrigerator LG with an inverter compressor:

• 🔄 Try reset settings to factory settings: press Power Cool + Power Freeze for 10 seconds.
• 📴 Disable the function Smart ThinQ (if connected to Wi-Fi) - sometimes firmware updates disrupt the algorithms operation.

For models with Door-in-Door:

• 🚪 Seal the inner door with tape if it opens too easily (this will reduce the flow of warm air).
• 🧴 Lubricate the hinges with silicone grease - a tight door seals better camera.

⚠️ Attention: If a refrigerator LG with an inverter compressor operates without stopping for more than 48 hours, do not delay repairs. The risk of compressor failure increases 5 times, and replacing it will cost half the cost of a new refrigerator.

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

❓ The LG refrigerator runs non-stop, but the temperature is normal. Is this a breakdown?

Not necessarily. In hot weather (above +30°C indoors) or when there is a large load of food, the compressor may run longer than usual. Check:

• Temperature in the room (optimally +18...+25°C).
• Mode settings (Power Cool, Eco Mode).
• Tightness of the seal.

If everything is in order, and the refrigerator does not turn off for more than 24 hours, this is a reason call a technician.

❓ Is it possible to fill freon into an LG refrigerator yourself?

No. Refilling the refrigerant requires:

• Special equipment (vacuum pump, pressure gauges).
• Experience (incorrect charging may lead to an explosion of the compressor).
• Certified freon (using LG or R-600a or R-134a, depending on the model).

Self-refilling will void the warranty and is dangerous to health.

❓ Why does the new LG refrigerator work without stopping for the first day?

This is normal! When you turn it on for the first time, the refrigerator blows cold into the empty chambers. The time of continuous operation depends on:

• The temperature in the room (the warmer, the longer).
• Volume of chambers (models Side-by-Side can work up to 12 hours in a row).
• Type of compressor (inverter ones turn on smoothly, but take longer to gain temperature).

If after 24 hours the refrigerator does not start to turn off, check the settings and seal.

❓ How to reset the Er IF error on an LG refrigerator?

The error Er IF means a problem with the freezer temperature sensor Try:

1. Disconnect the refrigerator from the mains for 1 minute, then turn it on. again.
2. Press and hold the button Freezer 5 seconds (to reset).
3. If the error remains, the sensor is faulty and requires replacement.

❓ How much does it cost to diagnose an LG refrigerator at home?

The cost of diagnostics depends on the region and service:

• Moscow/St. Petersburg: 1,500–2,500 ₽ (free if you order repairs).
• Regions: 1,000–1,800 ₽.
• Official service LG: 0 ₽ under warranty, 2,000–3,000 ₽ without warranty.

The average diagnostic time is 30–60 minutes.