Hello everyone . I have a 2000 F-550 w/7.3. I am having a bit of a problem with the hvac system. When I turn the selector switch to floor heat only or put it on vent or both the a/c clutch kicks on and off. Not when I put it on defrost but as I said only when it is in the other positions. I do know that the clutch will kick in and out when on the defrost position. That is fine. But why would it kick in and out when on the heat only position?

 

Go read the HVAC FAQs. Your answers are there.

Link is in signature below.

 

ok no it did not answer my question.... Iit says it is enabled in all positions but..... floor vent and off..... mine is operating on floor vent soo I think you read my post wrong