Four Sounds You Don't Want To Hear From Your Air Conditioning Unit
If your home's air conditioning unit is working properly, you should rarely, if ever, hear any sounds coming through your vents, aside from a gentle click when the system turns on and off. If you do happen to hear any of the four sounds listed below, contact an air conditioning technician to have it looked at immediately, especially since it could be a sign of a bigger issue.
Scratching
The sound of metal on metal is grating to the ears, but if you hear it coming from your air conditioning vents, it could also be a sign that one of your fan blades or another piece of metal has broken off and is scratching the inside of your unit.