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Answers: 1
My 1999 ford F 250 super Duty heat or ac will not blow out the vents. It is like all the vents are closed off
Answers: 3 Views: 541 Rating: 0 Posted: 11 years ago

check switch by bypassing  it.  there is a blend door in heater that selects heat or cooling. check to see if it's has not stuck shut.  The heater & AC gets it air from a grill right in front of hood or at bottom of windshield out side. It will be very simple when U find problem.

Rating: 1 Posted: 11 years ago

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