[LG Refrigerator] Understanding Noises From an Refrigerator

The valve opens and closes to reverse the direction of refrigerant circulation, causing a rhythmic clattering noise from the rear of the unit.
It may sound for about 7 seconds once a day as it initializes.
In addition, it may sound four times every hour for about 3 seconds.
These are normal operational sounds of the valve opening and closing.

Vibrations caused by the sudden movement of the compressor starting or halting can result in buzzing and shrilling noises.
Startup noise may occur for 30 to 60 seconds.
It can be louder when the refrigerator is not level or the compressor is not stably installed.
If the noise level is severe, please request service.

The compressor is responsible for compressing and circulating the refrigerant to create cold air needed for cooling.
When the refrigerator door is opened frequently or when hot food is stored, the compressor temporarily increases its speed, which may cause buzzing and whirring noises.

The operation of the cooling motor (compressor) causes oil and refrigerant flow, which can result in tapping, hissing or gurgling sounds, similar to the sound of water flowing through a drain pipe.
These are typical sounds associated with the functioning of a refrigerator.

As the refrigerator temperature changes, thermal contraction/expansion occurs, resulting in noises such as snapping, cracking, clicking.
This can be compared to the cracking sound you hear when ice melts.

The defrost cycle runs one to two times a day.
The dripping noise you hear is melting ice falling onto the floor.
When water droplets come into contact with the heater and evaporate, hissing noises may be heard, similar to the noise made when water droplets sizzle in a hot pan.

The fan motor may make whirring, humming noises while cooling the compressor (cooling motor) or blowing cold air into the storage compartment.
After the heater defrosts the ice on the evaporator, the fridge operates rapidly to achieve the preset temperature.
The compressor and the internal circulation fan operate at high speeds, generating a peak level noise once a day.
The noise may sound particularly loud during the night.

When you open the refrigerator door, warm air from outside enters the fridge and cools.
This causes a temporary pressure difference inside the refrigerator.
As a result, air inside escape through the drain tube at the back of the refrigerator, making whooshing, hissing sounds.

If the side or rear of the refrigerator is touching a cabinet or wall, the vibration of the compressor may cause rattling noises.
Please ensure that the refrigerator is installed at an appropriate distance from the cabinet or wall.

Additionally, vibrations of the compressor may cause rattling noise if the refrigerator is not installed level.
Use the height adjustment screws to level the refrigerator.
Check that the refrigerator is installed on an even floor, and move the unit to a location with an even floor if necessary.

※ Should the noise level become uncomfortable or excessive, please request service for proper diagnosis.

Sounds akin to rattling or drilling might be heard when the appliance is shifted or when the door is swung open or shut with force.
This sound results from the internal components of the compressor and its outer casing hitting against each other.
It's a transient noise that occurs when a working compressor is jostled, and it doesn't signify a product defect.
However, if the noise persists to the point of causing discomfort or becomes overly loud, please request service.

If there is an interfering object in the fan or the circulation motor itself malfunctions or freezes, abnormal noises of steady thudding and whirring may occur.
In such instances, the ice around the circulation motor needs to be removed.
This can be achieved by leaving the power cord unplugged for approximately one day during summer and three days in winter.
However, if you are worried about the food inside the fridge, please request service.

※ Noise that causes discomfort during use or that originates from a product defect can be difficult to rectify with simple measures.