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Other Noises - Refrigerator

Troubleshooting Refrigerators Last Updated 08/25/2015

Noises from the refrigerator may be a part of normal operation or caused by a malfunction in the unit's operation. Choose the type of noise from the tabs below to determine whether the noise is part of normal operation or not:


Some noises are part of the normal operation of the refrigerator. A buzzing, humming, or drilling noise can come from the compressor.

  1. If the noise lasts longer than 30 minutes and stops when the doors are open, this indicates that the noise is coming from one of the fans. This can be caused by frost buildup around the fan. Frost buildup can occur if the refrigerator cabinet and doors are not leveled properly. Refer to LG Refrigerator Leveling Instructions for instructions on leveling the refrigerator cabinet and doors.

  2. If the noise does not stop when the doors are open or does not last longer than 30 minutes, it is possible that the noises are part of the normal operation of the refrigerator.

    The compressor will change speeds according to the needs of the refrigerator in order to cool both the refrigerator and freezer compartments effectively. If the compressor goes into a higher speed than normal, noises that resemble buzzing, knocking, or banging may be heard.

  3. If the noises last longer than one hour, have recently become louder, or can be heard in another room, the refrigerator will require repair service.

If a clicking noise is heard coming from the refrigerator and there is no water supplied to the unit, check the icemaker to ensure that it is turned off. If the icemaker is on and no water is supplied, a clicking noise will be heard.

If there is water supplied to the refrigerator and the clicking noise can be heard in another room, or no water is supplied and the icemaker is turned off, the refrigerator will require repair service.

Depending on the type of compressor the refrigerator has, the noises heard may differ. For linear compressors, the refrigerator will be marked with a label on the display panel. If no label is present, the refrigerator has a standard compressor.

Linear Compressor sticker

Linear Compressor

Humming or buzzing noises may be heard coming from the compressor as it changes speeds according to the needs of the refrigerator in order to cool both the refrigerator and freezer compartments effectively. If the compressor goes into a higher speed than normal, noises may be heard that resemble buzzing, knocking, or banging. These sounds are normal.

If the humming or buzzing noise lasts for more than one hour, the refrigerator will require repair service.

Rattling noises may be heard from the compressor because the piston of the compressor sits horizontally, not vertically like others. The piston can vibrate when the doors of the refrigerator are shut. This noise should only last a few minutes if the doors are shut hard. This sound is normal.

Standard Compressor

Standard compressors will make a low buzzing or humming noise during operation. A drilling or knocking noise may also be heard. This is normal.

If the noise has recently become louder or can be heard in another room, the refrigerator will require repair service.

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