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JFN1
JFN1, ASE Certified Technician
Category: GMC
Satisfied Customers: 4508
Experience:  GM Master Technician
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On a 4th of july trip my ac ducts on my 99 suburban switched

Customer Question

on a 4th of july trip my ac ducts on my 99 suburban switched from the dash to the floor registers and will not go back up to the dash ..when it switched to the floor, it was cold initionaly but soon it turned hot air only coming outon the floor, & i had to open the windows ......i would like to know what is the fix for this?
Submitted: 1 year ago via CarComplaints.com.
Category: GMC
Expert:  JFN1 replied 1 year ago.
This sounds like you have a failure of the HVAC control head, if all of these things occurred at once. If nothing is responding as it should, I would check my fuses first, then source a replacement control head.