Refrigerator makes loud buzzing or humming noise from the back or bottom.
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.
Possible Causes
How to Fix / Troubleshooting
Safety first: Unplug the refrigerator before accessing the rear compartment. Moving parts and hot surfaces are present.
Step 1 – Remove rear access panel
- Take off the lower rear panel to expose the condenser fan and compressor.
Step 2 – Inspect condenser fan
- Check if the fan blade is rubbing on wiring, tubing, or shrouds; reposition as needed.
- Spin the blade by hand; if it feels rough or wobbly, replace the condenser fan motor and blade.
Step 3 – Check compressor mounts
- Inspect the rubber grommets under the compressor; if they are cracked or missing, replace them to reduce vibration.
Step 4 – Secure refrigerant lines
- Look for copper lines touching each other or the cabinet; gently bend or pad them with foam to stop rattling.
Repair Difficulty
Required Part
We may earn a commission from links on this page.