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

Discussion in 'Chevy Silverado Forum (GMC Sierra)' started by miked70, Jan 1, 2012.

  1. miked70

    miked70 New Member

    Speed control OK but will not blow out of dash vents, any ideas?
     
  2. Conlan Rose

    Conlan Rose Active Member 2 Years 1000 Posts

    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.
     
  3. miked70

    miked70 New Member

    Is there any sort of modulator possibly faulty?
     
  4. Conlan Rose

    Conlan Rose Active Member 2 Years 1000 Posts

    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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