Owners of modern household appliances are often faced with a situation when LG refrigerator begins to make unusually loud sounds, breaking the silence in the apartment. Instead of a quiet, barely noticeable hum, the device may produce a hum, knocking or whistling, which causes anxiety and fears for the safety of food. Understanding the nature of these sounds is the first step to solving the problem, since not every noise indicates a breakdown.
In this article we will look in detail why LG unit can work louder than usual, which components most often fail and how to carry out initial diagnostics.
Modern models, especially with the system No Frost, have a complex design where many moving parts interact with each other. A constant loud hum, accompanied by vibration of the body, most often indicates worn dampers or problems with the compressor, rather than normal operation. Let's look at the main reasons in detail.
Normal operating noise or a sign of malfunction
The first thing to do is determine whether the sound is normal. New LG refrigerators running on new generation refrigerants may produce specific sounds that have not previously been encountered in older models. For example, gurgling or overflowing of liquid is a normal process of circulation freon through the pipes of the system.
It is also worth considering that inverter compressors, which are equipped with many LG models, operate in constant mode, changing power. They do not turn off completely, but only slow down, creating a low-frequency hum. However, if the sound suddenly changes in tone or becomes intermittent, this is a cause for concern.
⚠️ Attention: If the loud sound is accompanied by a lack of cold in the chambers or frequent turning on and off of the unit, operation should be stopped until the reasons are clarified.
Frequent users They confuse normal thermal expansion of plastic with breakage. When the temperature changes, the chamber walls may crack slightly. This is a physical property of materials, and not a defect evaporator or other components.
Installation problems and vibration of the case
One of the most commonplace, but common reasons for increased noise is improper installation. If the LG refrigerator stands unevenly, the vibration from the running motor is transmitted to the floor and walls, increasing significantly. Checking the horizontal position is the first thing you need to do before calling a technician.
Internal elements can also vibrate if they are poorly secured. For example, egg trays or shelves, in contact with the walls during micro-movements, create rattling. It is also worth checking whether the rear tubes the condenser are touching each other or the cabinet wall.
To eliminate vibration, it is often enough to simply adjust the support legs. On modern LG models, they can be plastic or metal, adjustment is made by rotating clockwise or counterclockwise.
- 🔧 Check the distance to the walls: the unit should be no closer than 5-10 cm from the back and side walls for free air circulation.
- 🔧 Make sure that the floor under the legs is solid and does not sag, creating resonance.
- 🔧 Try to slightly tilt the body back - this will help the doors close tighter and reduce rattling.
Faults of the compressor and starting relay
The heart of the refrigerator is compressor. If it starts to work louder than usual, making clanging or metallic knocking noises, this is a serious signal. In older models, the starting relay often failed, which, when trying to start, made a loud click, after which the engine hummed, but did not start.
In models with with an inverter motor the situation is different. They do not have a classic relay, but are controlled by an electronic unit. A loud hum here may indicate a breakdown of the windings or mechanical wear of the internal parts of the motor. Repairing such a unit with your own hands is impossible; replacement is required.
Sometimes the compressor is working, but its fastening to the frame has become loose. The vibration is transmitted to the metal frame, creating a “rumble” effect. In this case, it is enough to tighten the mounting bolts, having first disconnected the device from the network.
Signs of the imminent death of the compressor
If, when the motor is running, the metal body heats up to temperatures above 80-90 degrees, and the noise is accompanied by a burning smell, the compressor is working at the limit of its capabilities.
Noise fan in the No Frost system
LG refrigerators with the system No Frost are equipped with fans that circulate cold air. Over time, ice can build up on the blades, causing imbalance and loud humming. The fan begins to touch the ice crust, producing a characteristic crackling sound.
Another reason is wear of the fan motor bearings. In this case, the sound becomes shrill, reminiscent of a whistle or howl. The noise is usually localized in the freezer or in a special compartment behind the back wall.
For diagnostics, you need to defrost the refrigerator. If after complete defrosting (at least 24 hours) the noise disappeared, but returned after a few days, it means that the water drainage system is broken or a faulty defrosting heating element is working defrost heating element.
☑️ Fan diagnostics
Icing and foreign objects objects
The products themselves can make extraneous sounds. Glass bottles placed close to each other may jingle due to shelf vibrations. It's also worth checking to see if any small objects have fallen behind the back panel or into the vents.
Icing on the evaporator is another common problem. If defrost system does not work correctly, ice may accumulate in large quantities. When the compressor is running, ice masses may crack or break off with a loud sound.
It is important to monitor the condition of the door seals. If they do not fit tightly, warm, moist air enters the chamber, which accelerates the formation of ice and increases the load on the system, causing it to operate louder.
| Sound type | Probable cause | Difficulty of repair | Necessary actions |
|---|---|---|---|
| Loud hum + vibration | Incorrect installation, compressor wear | Low / High | Adjusting the legs or replacing the motor |
| Crackling / Crunch | Ice on the fan, blade friction | Medium | Defrost, fan replacement |
| Clicks when starting | Starter fault relay | Low | Replacement relay |
| Gurgling / Overflow | Refrigerant circulation (Normal) | Not required | Surveillance |
⚠️ Attention: Specifications and node locations may vary depending on the specific LG model. Always check the official user manual before disassembling.
Diagnostics and methods for eliminating noise
If you determine that the sound is not normal, it is necessary to carry out diagnostics. Start with visual inspection and listening. Place your ear on different parts of the body (carefully so as not to damage the tubes) to localize the source.
Check the tension of the belts (if your model has them, although LG often has direct transmission) and the condition of the shock absorbers. Rubber gaskets under the compressor become tanned over time and cease to dampen vibration. Replacing them is a cheap and effective way to reduce noise.
In some cases, it is necessary to clean the condenser from dust. A clogged radiator on the rear wall forces compressor to work with increased load, which increases the noise level. Cleaning can be done with a soft brush or vacuum cleaner.
Why does the new LG refrigerator hum loudly?
New models are often louder than older ones due to more powerful compressors and refrigerant features. However, if the humming noise is accompanied by strong vibration, check the shipping bolts (if they have not been removed) and the leg adjustment. Also, give the equipment 2-3 days to “grind in” after the first start.
Is it possible to lubricate the compressor if it is noisy?
It is impossible and impossible to lubricate the compressor of an LG refrigerator. This is a sealed unit that does not require maintenance. If the noise comes from it, the entire unit needs to be replaced. Lubrication is possible only for fan bearings, and then with special frost-resistant compounds.
How often do you need to defrost a No Frost refrigerator?
The No Frost system does not require manual defrosting to remove ice, as this happens automatically. However, once every 6-12 months it is recommended to carry out a complete defrosting and washing for hygiene and checking the drainage system, which can also reduce the noise level.
Is it dangerous to continue to operate a noisy refrigerator?
If the noise is caused by vibration or food, it is not dangerous. If the compressor hums or the fan crackles, further operation can lead to overheating of the motor, freon leakage and food spoilage. It is better to carry out diagnostics.
How much does it cost to replace a fan in an LG refrigerator?
The cost consists of the price of the spare part and the work of the technician. The fan is relatively inexpensive, but can be difficult to access. The exact price can only be found out after diagnosing a specific model, since prices for components are constantly changing.