How to Fix / Troubleshooting

Safety First: Unplug the refrigerator before working at the back.

Steps:

Access rear compartment: Remove the lower rear panel to expose the compressor and condenser fan.
Inspect fan: Check for debris (plastic, insulation, dust) hitting the fan blades. Clean thoroughly.
Tighten mounts: Ensure the condenser fan motor and compressor mounting bolts or rubber grommets are secure.
Run test: Restore power briefly and listen to identify whether the noise comes from the fan or compressor.
Replace noisy fan: If the fan is the source and bearings are noisy, replace the condenser fan motor.
Compressor noise: If the compressor itself is loud and vibrating excessively, professional evaluation is recommended; compressor replacement is a major repair.

Refrigerator makes loud buzzing or humming noise from the back.

Possible Causes