Refrigerator Making Unusual Noises
While refrigerators make some normal sounds, unusual noises can indicate problems. Learn which sounds need attention.
Common Symptoms
You may be experiencing one or more of these issues:
- Loud buzzing or humming
- Clicking sounds
- Grinding or scraping noises
- Rattling sounds
- Squealing or squeaking
- Popping sounds
- Gurgling or bubbling
Possible Causes
Normal Operating Sounds
commonGentle humming, occasional clicking, and gurgling are normal operational sounds.
Dirty Condenser Fan
commonDust or debris on the condenser fan can cause rattling or humming.
Evaporator Fan Issues
commonIce buildup or failing motor can cause the evaporator fan to make noise.
Compressor Relay Problems
moderateA failing start relay causes repeated clicking as the compressor tries to start.
Loose Components
moderateDrain pan, tubing, or other components may have come loose and vibrate.
Compressor Failure
rareInternal compressor problems can cause loud humming, knocking, or grinding.
DIY Troubleshooting Steps
- 1
Identify the Sound Location
Determine if the noise comes from the back/bottom (compressor area), inside freezer (evaporator fan), or top (condenser for Sub-Zero).
- 2
Check for External Causes
Remove items from the top of the refrigerator. Check that the unit is level. Look for items touching the refrigerator that might vibrate.
- 3
Inspect the Drain Pan
The drain pan under the refrigerator may be loose or have debris. Carefully slide it out and reseat it properly.
- 4
Clean Condenser Fan Area
Unplug refrigerator and access the condenser fan. Remove any debris and check that the blade spins freely.
Always unplug before servicing. Keep hands clear of fan blades. - 5
Check for Ice Buildup
If the noise comes from the freezer, check for ice buildup around the evaporator fan. Frost can cause the fan to hit ice.
When to Call a Professional
Contact a repair service if you experience any of these situations:
- Grinding or scraping sounds that persist
- Clicking continues repeatedly without compressor starting
- Loud buzzing accompanied by cooling problems
- Any sudden, new loud noise
- Squealing that doesn't stop
- Noise combined with cooling issues or error codes
Ready to schedule professional repair?
Prevention Tips
- Regular cleaning prevents dust buildup on fans
- Keep refrigerator level to prevent vibration
- Address small noises before they become big problems
- Schedule annual professional inspection
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