HVAC Making Strange Noises
Your heating or cooling system is making unusual sounds like banging, squealing, or grinding.
Unusual sounds from your HVAC system often indicate a problem that needs attention. Different sounds point to different issues, and identifying the type of noise helps diagnose the problem.
Safety Information
Metal-on-metal grinding sounds can indicate imminent component failure. Turn off the system to prevent further damage and call for service.
Possible Causes
What You Can Check First
- 1
Listen carefully to identify where sound originates
- 2
Check for loose panels or screws on the unit
- 3
Remove any visible debris from outdoor unit
- 4
Note if sound occurs during specific cycles (startup, running, shutdown)
- 5
Check if sound is from vents or the unit itself
Professional Solutions
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Common questions about this issue
There are several potential causes: Loose or broken blower wheel or fan blade, Worn belt or motor bearings, Loose panels or ductwork vibrating. A professional diagnosis can identify the exact issue with your system.
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