My 96 Sentra GXE has an annoying rattle coming from the right ac vent on the dash. It is the small vent nearest the passenger door and mounted on the dash. I know the solution must be simple, but I would appreciate a suggestion or two.
if it sounds like something hitting the spokes on a bicycle, it could be that something is in your blower motor. you can easily remove the glovebox, then the blower motor itself and check for debris. that gets annoying at times.