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  1. #1

    Default Heater fan switch not changing from defroster to dash vents??

    Speed control OK but will not blow out of dash vents, any ideas?

  2. #2


    had identical problem with my tahoe but previous owner got it fixed some times the valve the directs were the air blows gets blocked and wont blow out of the vents also vents might not be hooked up right or knocked out of place. the ducting in located under the dash and behind it.

    1996 Chevy Tahoe LT 5.7L V8 4X4 205,000+ miles. Built proudly at Janesville Assembly in Janesville, Wisconsin
    Basic mods: Lights all over, bunch of electrical work, and a couple cooling mods.

    Check out my other mods in My Garage:

  3. #3


    Is there any sort of modulator possibly faulty?

  4. #4


    well the direction selection switch might be faulty thats a possibility. have u tryed to move it and does it change functions?

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