How to Fix / Troubleshooting

Safety first: Unplug the refrigerator before touching any moving parts.

Inspect fan area: Remove the rear lower panel and check for cardboard, insulation, or wires contacting the condenser fan blade. Clear obstructions.
Check fan motor: Spin the fan by hand; if rough or noisy, replace the condenser fan motor.
Compressor mounts: Ensure the compressor mounting bolts or rubber grommets are intact and not allowing metal-to-metal contact.
Level and isolate: Level the refrigerator and ensure it is not touching cabinets or walls that can resonate noise.

Loud buzzing or humming noise from back of refrigerator.

Possible Causes