LG
Refrigerant Line or Compressor Mount Vibration
Freezer makes loud knocking or banging noises during operation, especially when compressor starts or stops.
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Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
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Possible Causes
Loose or misrouted refrigerant tubing, Worn compressor mounting grommets, Cabinet panels flexing against frame, Ice blocks shifting inside evaporator area
How to Fix / Troubleshooting
Safety: Unplug the freezer before adjusting tubing or mounts.
- Check leveling: Ensure the freezer is level front-to-back and side-to-side. Adjust leveling legs as needed.
- Inspect rear tubing: With the rear panel removed, gently move refrigerant lines away from each other and from cabinet surfaces. Add foam or clips to prevent contact.
- Compressor mounts: Verify the compressor is firmly held by its rubber grommets and not contacting the base directly.
- Internal ice: If noise seems to come from inside, check for large ice blocks around the evaporator. Fully defrost if necessary.
If knocking persists and appears to be internal to the compressor, the compressor may be failing and should be evaluated by a professional.
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Repair Difficulty
Medium
3/5
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