Extraneous noise from household appliances always causes concern, especially when it comes to refrigeratorworking around the clock. If your brand unit LG starts to make unusually loud sounds, hum or vibrate, you cannot ignore it. Often the problem lies in trivial things that you can fix yourself in a few minutes, without resorting to the help of a technician.
However, in some cases, a hum indicates serious malfunctions of internal components, such as compressor or the refrigerant removal system. Understanding the nature of the sound helps pinpoint the source of the problem. In this article, we will examine in detail why equipment LG can make more noise than usual, and what steps need to be taken to eliminate the discomfort.
Do not panic when you hear the first loud sound. Modern refrigerators are equipped with powerful cooling systems that do not always operate silently. But if the hum has become intrusive and interferes with the peace in the apartment, immediate diagnosis equipment condition is required.
Normal operating noise or a sign of breakdown
The first thing the owner needs to do is to understand the difference between normal operation and emergency regime. New models of refrigerators LG with technology Linear Inverter operate much quieter than their predecessors, but they cannot be completely silent. A quiet hum of the engine, periodic gurgling of the refrigerant and clicks of the thermostat are considered normal.
If the sound resembles a rattling sound, a metallic clanging or a continuous powerful hum that increases over time, this is a clear signal of a problem. Users often confuse case vibration with engine failure. To determine the nature of the noise, try to gently touch the side walls or rear grille (be careful, it may be hot there).
⚠️ Attention: If the hum is accompanied by a lack of cold in the chambers or excessive heating of the back wall, immediately unplug the device and call a specialist. Operating a faulty unit can lead to compressor combustion.
It is important to consider the age of the equipment. Older models may make more noise due to natural wear of rubbing parts and drying out of the lubricant. At the same time, a new refrigerator that began to hum in the first days of use was most likely installed incorrectly or has a manufacturing defect.
Installation problems and vibration of the case
The most common reason why the refrigerator LG makes a strong hum and vibration, - this is an incorrect setting. If the device is not level, its legs are not adjusted, or it touches the cabinet wall, vibration from the operating compressor is transmitted to the housing and resonates. This creates the effect of increased noise throughout the entire kitchen.
Check the distance between the back wall of the refrigerator and the wall of the room. It should be at least 5-7 centimeters for free air circulation. Also make sure that the unit does not touch adjacent furniture or other household appliances. Even the slightest touch can turn quiet operation into loud rattling.
- 🔧 Use a building level to check that the refrigerator is installed horizontally in all axes.
- 🦶 Adjust the height of the front support legs to ensure a stable position and a slight tilt back.
- 🧱 Make sure the floor is under The refrigerator is level and can withstand the weight of the device filled with food.
Often the problem is solved by simply tightening the adjusting screws on the front legs. If the floor is slippery (for example, tiles or linoleum), you can place special anti-vibration mats or pieces of thick rubber under the supports. This will dampen vibrations and reduce the overall noise level.
☑️ Installation diagnostics
Faults compressor and start relay
The heart of any refrigerator is the compressor. Models LG often use inverter motors, which should operate smoothly and quietly. If you hear a loud, increasing hum that ends abruptly with a click, most likely the problem lies in starting relay or the engine itself.
The starting relay is responsible for starting the motor. If it fails, the compressor tries to start, hums for a few seconds, but cannot gain speed, after which the protection is triggered and a shutdown click is heard. This cycle can be repeated endlessly, which is very dangerous for the motor windings.
In the case of conventional (non-inverter) compressors, a strong hum may indicate mechanical wear of the internal pistons or valves. If the motor works “pull” and makes the sound of a running tractor, there may be a drop in pressure or jamming of the mechanism.
| Type of sound | Probable cause | Nature of the malfunction | Difficulty of repair |
|---|---|---|---|
| Uniform hum | Normal operation or overload | Normal mode or lack of freon | Low |
| Hum + clicks | Fault starting relay | The compressor does not start | Medium |
| Metal clanging | Destruction of the motor mount | Internal impact of parts | High |
| Whistling or hissing | Refrigerant leak | Circuit leakage | High |
For accurate diagnosis of the condition compressor requires a special device - a winding tester. If you do not have the skills to work with electrical equipment, it is better not to touch this unit yourself. Replacing a compressor or relay requires evacuation of the system and charging with refrigerant.
What is an inverter compressor?
The inverter motor in LG refrigerators does not operate at full power all the time, but smoothly regulates speed. This makes it quieter and more economical, but if the electronic control module breaks down, it can emit a specific high-frequency whistle or intermittent hum.
Noise of the No Frost system and fan
Refrigerators LG with the system No Frost equipped fans that circulate cold air through the chambers. Over time, a coat of ice may form in the fan compartment, and the blades will begin to touch frozen ice. This causes a characteristic crackling, grinding or increased wind noise.
Another reason for noise in this part is drying out of the lubricant in the fan bearings. In this case, the motor begins to hum and squeal. To test this hypothesis, you need to defrost the refrigerator completely (for at least 24 hours with the doors open).
If the noise disappears after defrosting, but returns a week later, it means that the tightness of the door seals is broken or the drainage hole through which water should go into the evaporator is clogged. The water freezes and the fan begins to pick up ice again.
- ❄️ Completely defrost the unit within 24 hours to remove ice from the evaporator.
- 🌬️ Check the free movement of the fan blades after defrosting.
- 🚿 Clean the drainage hole in the rear the chamber wall with warm water.
Sometimes foreign objects that get into the fan compartment (for example, a piece of packaging or a label) can cause rattling. A visual inspection after removing the back panel in the freezer will help identify such nuances.
⚠️ Attention: Do not try to remove ice from the evaporator with a knife or other sharp objects. You can damage thin tubes with freon, which will lead to expensive repairs and loss of tightness of the system.
The influence of the amount of food and dishes
Paradoxically, the cause of noise can be either an empty refrigerator or an overly filled one. If there is little food in the chambers, air flows circulate more freely, but empty shelves and glass surfaces can resonate, increasing the sound of the motor. Empty plastic containers touching each other also create rattling noise.
On the other hand, if food is placed close to the back wall or obscures the ventilation holes, the load on the system No Frost increases. The fan begins to work harder, trying to pump air through obstacles, which leads to an increase in noise level.
Glass shelves and bottles of liquid that are placed unsteadily can vibrate from the compressor. It is enough to rearrange them or place a soft cloth under them to eliminate the unpleasant sound. Also check that the food does not touch each other and the walls of the chamber.
When you need to call a specialist
There are a number of situations when self-repair not only will not help, but will also aggravate the situation. If you checked the installation, defrosted the unit, but hum it did not stop, and the temperature in the chambers stopped dropping to the required values, the problem is serious.
A technician will be required if you hear a burning smell, if the compressor is hot to the touch (more than 90 degrees) or if the refrigerator turns on and turns off every 2-3 minutes. These are signs that the engine resource has been exhausted or a breakdown has occurred in the electrical circuit.
Professional diagnostics are also needed if a freon leak is suspected. Although the gas itself is odorless, an indirect sign may be hissing (if the hole is large) or a complete lack of cold when the engine is running. In such cases, special equipment is required to find leaks and evacuate the system.
Is it possible to replace the compressor on an LG refrigerator yourself?
Theoretically, it is possible if you have the skills to weld copper pipes, a vacuum pump and a pressure gauge station. However, this is not possible for the average user. Incorrect soldering or the amount of freon charged will lead to rapid breakdown of the new compressor.
Why does the new LG refrigerator hum loudly in the first days?
New units may make more noise due to the grinding in of parts. However, if the noise does not subside after 3-5 days, check the shipping bolts (if they are on the compressor) and the correct installation of the legs.
How often do you need to defrost a No Frost refrigerator?
The No Frost system does not require manual defrosting to remove ice, but a preventive shutdown once a year is necessary for hygiene, drying hidden cavities and checking the drainage systems.
Does the mains voltage affect the noise of the refrigerator?
Yes, low or unstable mains voltage causes the compressor to work with overload, which increases the level of noise and hum. In such cases, it is recommended to use a voltage stabilizer.