I know this has been covered, but my problem seems to be a little different. I replaced the 30 amp fuse which blew and the A/C at first did not work. I then flip the temp control to heat and then back to cold range and the A/C has since worked again. However, when I move the temp control to maximum cold, there is a clacking sound that comes from the dash. If I adjust to the mid range cold, then the clack-clack sound goes away? I wonder what is causing this sound? Any idea would be appreciated.

John