Ford Repair: AIR FROM DEFROSTER ONLY, proplem, default mode

Question
AIR IS COMING OUT OF THE DEFROSTER ONLY.  NO AIR FROM HEATER OR AC OR VENT.  WHAT AM I LOOKING FOR?  WHERE DO I LOOK FOR THE PROBLEM?

TONY C.

Answer
hey there. well first of all i need to know what type of vehicle this is, and if it ia climat control system od manual system. on both versions, this could meen ANYTHING!!  when air comes out the defrost only! this is default mode, is there is any kind of proplem is automatically goes and stays to this setting so windows can still be derosted to drive. give me some more information and i will try to help you out some more.
Chris P