AC makes abnormal sounds like rattling, buzzing, clicking, or squealing during operation
Fix Steps:
1
Identify noise type: rattling (loose parts), buzzing (electrical), squealing (fan bearing)
2
Tighten all mounting screws and bracket bolts
3
Check for loose panels - press on each panel to locate rattling source
4
Clean fan blades and verify fan is not hitting anything
5
Ensure unit is installed level and secure
6
Remove any debris from outdoor coil fins
7
Check compressor mounting - rubber grommets may need replacement
8
Inspect fan motor bearings - may need lubrication or replacement
9
Verify condensate drain is not causing water sloshing noise
10
Listen if noise stops when fan-only mode is on - isolates compressor issues