Hello - my Freestar's front air/heat works fine. When I turn on the rear air/heat, the fan will not blow. I can hear clicking sounds in the back driver's side when I alter the controls from front to rear controls then back again, and when the fan speed is increased or decreased. When I originally noticed the problem, we checked the fuses, but those are all fine. That was when I noticed the sounds from the rear. Any suggestions?