i guess i,m getting a lot of these lately---on my 04 i have a scratching grinding noise coming from the radio /climate control area ----it is very faint ----seems to only happen when auto is on and continues even after car is shut off--------------if i drive for a while with it off there is no noise ---------every thing works fine -------air is being sent to where it needs to go -------but i would like to correct it before something fails -------thanks