It’s normal for a refrigerator to make some noises as part of its daily operation. However, some noises, like a loud knocking sound, could mean a part needs to be replaced or the refrigerator needs some maintenance. Here’s what could be causing knocking sounds from the fridge.
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Condenser Fan Motor or Blade
Knocking noises from the bottom or behind the refrigerator could indicate a problem with the condenser fan or it’s motor. The condenser fan helps cool the condenser coils and evaporate any water in the drip pan tray. The fan’s motor may be faulty resulting in a knocking noise. The fan blades can also be dirty or broken. Remove the panel behind the fridge to access and inspect the condenser fan. If the blades of the fan are clean and move freely, then the motor may be the issue and will need to be replaced.
Purchase a new Refrigerator Condenser Fan Motor.
Purchase a new Refrigerator Condenser Fan Blade.