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1999pontiac trans am heating and ac vents wont change.no air blows from dash vents?

Most of the air from fan blows from lower vents by your feet and some from the defroster but it will not switch. I took the control panel out of the dash and the y all seem good and there is vacuum going to the switch. How much should there be?

Is there a common problem ? Nothing in my service manual about that system.

2 Answers

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  • Hank
    Lv 4
    10 years ago
    Favorite Answer

    The blend door actuator is bad usually due to moisture build up from a clogged drain tube for the HVAC system

    Source(s): 15 years mechanic
  • ?
    Lv 4
    4 years ago

    Wow! i would be getting my canines quickly and the block off component of the homestead she'll be staying in does have a vent. real now we are canines proofing the area so i will verify that blockading the vents or eliminating her collar is on the record! thank you lots. All those little ifs and buts seem impossible until they take place!

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