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ac/heater control malfunction

Discussion in 'The Garage' started by Poker, Mar 25, 2005.

  1. Poker

    Poker Registered Member

    Joined:
    Mar 23, 2005
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    Location:
    Texas
    1985 k5 ac/heater control modeul will not work right.
    after looking into it... i see that the vaccume isnt activating to turn the vent to allow it to work. question is .. is it the vaccume or the ac/heater control... and how do i find out which it is?

    the air blows and the motor works on low med med/high but not high.

    thnx for the help
     
  2. tx_sub

    tx_sub 1/2 ton status

    Joined:
    Mar 5, 2004
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    Location:
    Denton, TEXAS
    check the relay on the ac box under the hood. the same thing happened to me this past summer. 15 or so for the relay at napa. fixed my problem.
     

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