Anytime you turn the defroster on the a/c will run to remove humidity! If you lose heat at idle, check the output of the waterpump. Impellers may be disolving.
Fords need to have the coolant system checked for voltage! Open the tank put neg lead on neg post and positive lead in the coolant tank, any voltage?
Wednesday, September 5th, 2007 AT 2:34 AM