The situation when your LG refrigerator ceases to cope with its main function always takes you by surprise. Food begins to deteriorate, condensation appears on the walls, and the inside becomes noticeably warmer than it should be. This is not just a household inconvenience, but a signal that a failure has occurred in the system that requires immediate attention.
Before calling a technician or looking for spare parts, it is necessary to carry out an initial diagnosis. Often the reason lies in trivial things that can be eliminated on your own in a few minutes. However, if simple methods do not help, then the problem lies deeper - in technical components or cooling system.
In this article we will analyze in detail all the possible reasons why LG appliances do not freeze well, and we will explain how to distinguish a minor malfunction from a serious one breakdowns. The lack of cold in one chamber while the other is operating normally indicates a refrigerant leak or a clogged capillary tube. Understanding these nuances will help you save time and money.
Primary diagnosis and external factors
Many users begin to panic immediately, noticing that the products are not cooled enough. However, before you commit a breakdown, you should exclude external factors. Door tightness is the first parameter that needs to be checked. If the rubber seal is worn out, dirty, or simply does not fit completely, warm air constantly enters the chamber.
It is also worth paying attention to the operating mode. If you've just loaded your refrigerator with a large amount of warm food, the compressor may simply not be able to handle the sudden temperature increase. In models with No Frost this may cause increased ice formation, which will temporarily reduce efficiency.
Check whether the temperature setting is correct. Perhaps one of the household members accidentally touched the regulator or changed the settings in the electronic menu. For models with a display, the range from +2 to +6 degrees in the main camera is considered normal. If the readings are significantly higher, try to force change the settings.
Don’t forget about ventilation. If your LG refrigerator is placed close to a wall or furniture, the radiator on the back wall cannot effectively transfer heat. This causes the system to overheat and reduce performance. Leave a gap of at least 5-10 cm for air circulation.
Problems with the door seal and tightness
One of the most common reasons why LG refrigerator poor freezing is a violation of the chamber seal. The rubber seal (cuff) loses elasticity over time, cracks or deforms. Through the resulting cracks, warm air penetrates inside, forcing the compressor to work in increased mode without interruption.
You can check the tightness in a simple way. Take a sheet of paper or a thin bill, clamp it with the door and try to pull it out. If the paper pulls out too easily or falls out on its own, it means the pressure is loose. In some cases, adjusting the hinges helps, but most often the seal needs to be replaced.
⚠️ Attention: If you notice that the seal is covered with sticky residue or mold, do not rush to change it. Wash the rubber part thoroughly with warm soapy water and wipe dry. This often restores the tightness of the seal.
Another important aspect is the skew of the door. This often happens if the refrigerator has been standing unevenly for a long time or has been transported incorrectly. Visually, the distortion may be almost invisible, but this is enough for tightness. Check the horizontal installation using a building level and, if necessary, tighten the adjustable legs.
Malfunctions of the defrosting system (for No Frost models)
LG refrigerators with the No Frost system are susceptible to a specific problem - ice fouling on the evaporator. In normal operating mode, a special TEN (heater) periodically turns on and melts the frozen frost. If this process is disrupted, the ice coat blocks the circulation of cold air.
As a result, it becomes warm in the main chamber, but in the freezer, on the contrary, it may be too cold, or the cold does not reach the upper shelves. The system “thinks” that the temperature is normal (since the sensor can be immured in ice next to the evaporator), and does not turn on the compressor at full power.
The main elements of the defrosting system that can fail:
- ❄️ Heating element evaporator — it burns out and stops heating the ice.
- ❄️ Defrost thermostat —does not give a command to turn on the heating.
- ❄️ Defrost timer (or control module)—“forgets” to start the defrost cycle.
- ❄️ Drainage hole —clogged, and the melt water does not leave, but freezes.
Diagnostics often require partial disassembly of the back wall in the freezer. If you see a thick layer of ice on the evaporator and fan, the defrost system is not working. Complete defrosting of the refrigerator within 24 hours will temporarily solve the problem.
☑️ Diagnostics of the No Frost system
Freon leak and problems with the compressor
If the refrigerator is humming, works almost non-stop, but there is no cold anywhere (neither in the freezer nor in the main chamber), most likely it has occurred refrigerant leak. Freon circulates in a closed circuit, and if a microcrack forms in the tubes (often due to corrosion or mechanical damage), the gas escapes.
Without a sufficient amount of freon, heat transfer does not occur. The compressor tries to compensate for this by constant operation, which leads to its overheating and eventual breakdown. It is difficult to notice a leak visually, but an indirect sign may be swelling of the side walls (in places where the circuit is sealed) or the appearance of yellow rust spots.
The second serious problem is the malfunction of the compressoritself. This is the "heart" of the refrigerator. If it starts, hums for a few seconds and turns off with a click, or does not start at all, the problem is in the start relay or the motor windings. In LG inverter models, diagnostics are more complicated and require special equipment.
| Symptom | Probable cause | Difficulty of repair |
|---|---|---|
| Humming, but not cold | Freon leak / Clogging | High (needs a technician) |
| Clicks and turns off | Start relay / Compressor | Medium |
| Works without stopping | Leakage / Thermostat malfunction | High |
| Loud knocking/humming | Compressor wear / Fan | Medium/High |
⚠️ Attention: Filling with freon and soldering the circuit requires a license and special tools. In this case, independent repair is prohibited and dangerous to health.
Clogged capillary tube
Another technical reason why LG refrigerator stopped freezing is a clogged capillary tube. This is a very thin pipe that carries the refrigerant to the evaporator. Over time, oil oxidation products or moisture can accumulate inside the system, which turns into an ice plug.
Symptoms of a blockage are often confused with a freon leak. The compressor is running, the condenser (grid at the back) may be hot, but the evaporator inside the chamber remains only partially warm or cold. A characteristic sign is that the compressor housing may heat up more than usual due to increased pressure.
To eliminate this problem you need to:
- 🔧 Drain the remaining freon from the system.
- 🔧 Blow through the circuit with nitrogen under high pressure.
- 🔧 Replace the filter drier (required).
- 🔧 Evacuate the system and fill with new freon.
At home, it is almost impossible to perform these operations efficiently. Requires a vacuum pump, a pressure gauge station and a supply of refrigerant. Attempts to clean the tube without opening the circuit usually do not give long-term results.
Why does a blockage form?
Clogs most often occur after unqualified repairs, when the system was poorly vacuumed before refueling, or due to prolonged downtime of equipment in an unheated room, which led to the accumulation of moisture inside.
Malfunction of the thermostat and sensors
The electronics of LG refrigerators are very sensitive. thermal sensors (thermistors) and air dampers are responsible for maintaining the temperature. If the sensor in the main chamber “lies” and sends a signal to the control module that there is enough cold, the compressor simply will not turn on.
In models with a display, this problem is often indicated by a flashing temperature indicator or an error code (for example, Err or a combination of letters). In mechanical refrigerators, this is controlled by a thermostat - a round “tablet” with a tube. If its contacts are stuck or the membrane has lost its sensestruththe cooling cycle is disrupted.
Often the problem lies in the Air Assist damper (in two-chamber models). This is a plastic curtain that opens and closes the cold air channel from the freezer to the refrigerator compartment. If the damper drive is stuck in the closed position, cold does not enter the upper chamber, although everything in the freezer is frozen.
Diagnostics of the sensors is carried out using a multimeter in resistance measurement mode. As the temperature changes, the resistance of a working thermistor should change smoothly. If the device shows a break or short circuit, the part must be replaced.
Frequently asked questions and answers (FAQ)
Why does the LG refrigerator hum, but does not freeze after defrosting?
If you defrosted the refrigerator for less than 8-10 hours, ice in hard-to-reach places (for example, inside foam or in channels) may not have had time to melt. When turned on, the compressor works, but there is no circulation. The defrost heating element, which did not melt the ice initially, could also burn out. Let the equipment stand turned off for another day.
Is it possible to operate the refrigerator if it does not freeze well?
For a short time - yes, but not for long. Constant wear and tear on the compressor will lead to overheating and costly replacement. In addition, bacteria multiply quickly in a warm environment, which is dangerous to health. It is better to temporarily move the food to another place.
What does a flashing "Ice Plus" indicator or a snowflake on the display mean?
In different LG models, this may mean that the super freezing mode is on or, conversely, a malfunction signal. If the flashing is accompanied by a lack of cold, this is an error code. Try unplugging the refrigerator from the outlet for 15 minutes to reboot the module.
How often do you need to defrost the LG No Frost refrigerator?
The system No Frost does not require manual defrosting to remove ice, as this happens automatically. However, once every year or year and a half, it is recommended to turn off the refrigerator for a day for hygienic cleaning and checking the drainage system. This will extend the life of the equipment.
Why is it warm in the refrigerator compartment, but normal in the freezer?
This is a classic sign of a malfunction of the defrosting system (the evaporator is clogged) or a breakdown of the blower fan, which drives air from the freezer into the upper chamber. Less often, there is a problem with the damper or a freon leak, when the amount is only enough for the first circuit (freezer).