74 heater hose control valve

Discussion in '1974 Specific' started by Camaro67_rcl, Jul 10, 2016.

  1. Camaro67_rcl

    Camaro67_rcl New Member

    2
    0
    Apr 12, 2015
    Philadelphia, Pa
    Anyone have a 74 with factory a/c ?
    Looking for location of heater control valve for a/c system. I don't see one on mine.

    Thanx
     
  2. ronzz572

    ronzz572 Veteran Member Lifetime Gold Member

    1,741
    34
    Feb 8, 2007
    imperial pa
    A 74 camaro with a/c does not have one. It uses a blend door internal to the interior heater box. It's vacume operated through the heater controler.
     
  3. Camaro67_rcl

    Camaro67_rcl New Member

    2
    0
    Apr 12, 2015
    Philadelphia, Pa
    Thank you ,,,went back out & found that out. The acutators seem to be working except one at kick panel ( no vacuum).
    Anoyone have the diagram for the vacuum lines.
    A/C is just blowing 60* air
     
  4. ronzz572

    ronzz572 Veteran Member Lifetime Gold Member

    1,741
    34
    Feb 8, 2007
    imperial pa
    Actually the temp door operates with the cable from the controler. It's attached behind the glove box top side of the heater box. Make sure it's moving fully. There is a adjustment at the box side of it.
     
  5. twozs

    twozs Veteran Member

    8,418
    78
    Aug 5, 1999
    hopewell jct ny
    silly question , how cold is the suction line ?
     

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