Diagnosis
The most likely source is the evaporator fan motor at the back of the freezer compartment. Debris or ice buildup can cause the fan blade to rub.
How to Fix It
1. Remove all items from the freezer and the top shelf.
2. Locate the rear panel inside the freezer.
3. Remove the panel screws to access the evaporator coil and fan.
4. Check for ice accumulation around the fan housing. If present, the defrost system may have failed.
5. Manually clear all ice and ensure the fan blade spins freely.
6. Reassemble the panel and restore power.
If That Didn't Work
The condenser fan motor, located at the bottom rear behind the kickplate, can also buzz if obstructed. Pull the fridge out, remove the lower rear kickplate, and check for dust, pet hair, or wiring touching the fan blades.
Heads Up
A continuous loud hum, not a buzz, is often the compressor starting. This is normal, especially during the cooling cycle. The diagnostic test is to unplug the fridge for 30 seconds: if the noise stops immediately, it is likely the compressor.