Dismiss Notice

Welcome To CK5!

Registering is free and easy! Hope to see you on the forums soon.

Score a FREE t-shirt and membership sticker when you sign up for a Premium Membership and choose the recurring plan.

Air Conditioning question?

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by Moose, May 24, 2001.

  1. Moose

    Moose 1/2 ton status

    Joined:
    Feb 17, 2000
    Posts:
    1,062
    Likes Received:
    0
    Location:
    Glendale, Arizona
    Can anyone tell me whats going on with my air. When I run it on Norm there is no difference in that or Max. I don't think somethings switching to make it blow harder. Any help would be great. thanks
     
  2. mlb79

    mlb79 Registered Member

    Joined:
    May 24, 2001
    Posts:
    40
    Likes Received:
    0
    Location:
    evansville, IN
    Make sure your vacuum ball is connected. Sounds like one of the diverters is not working. I would check out the vacuum lines as a first step. I have completely gone through my 79,so hollar if this doesn't help and I will check mine to see if I can help you figure it out.
     
  3. Can Can

    Can Can Pusher Man Staff Member Super Moderator

    Joined:
    Feb 17, 2000
    Posts:
    15,552
    Likes Received:
    136
    Location:
    Cochrane, Alberta, Canada
    Correct me if I'm wrong, but I believe that the Norm and Max settings simply refer to the number of vents the cool air comes out of. The only way to increase or decrease the velocity of the airflow is with the fan setting.



    <font color=red>PHOTO ALBUM-</font color=red> <A target="_blank" HREF=http://albums.photopoint.com/j/AlbumList?u=1289798>http://albums.photopoint.com/j/AlbumList?u=1289798</A>.......<font color=blue>TRUCK & HIKING PICS</font color=blue>
     
  4. mlb79

    mlb79 Registered Member

    Joined:
    May 24, 2001
    Posts:
    40
    Likes Received:
    0
    Location:
    evansville, IN
    The max setting on mine adjusts the side damper under the glove box to a position where the air is recirculated from inside the cab. The norm position pulls air from the outside by moving the same damper. This damper is operated by vacuum and is the big vacuum diaphram behind the kick panel on the passager side. Mine is a 79 so other years my work differently.
     
  5. HarryH3

    HarryH3 1 ton status Author

    Joined:
    May 31, 2000
    Posts:
    10,384
    Likes Received:
    2
    Location:
    Georgetown, TX
    They're pretty much always worked exactly as you described. Even my '94 Suburban works like that. The only caveat that I can think of is that in the early 70's, when you switched the setting to "max", it automagically put the blower on hi to keep the evaporator from freezing over.

    <font color=black>HarryH3 - '75 K5</font color=black>
    <A target="_blank" HREF=http://ThunderTruck.ColoradoK5.com>http://ThunderTruck.ColoradoK5.com</A>
    It's a great day to be alive...
     
  6. mlb79

    mlb79 Registered Member

    Joined:
    May 24, 2001
    Posts:
    40
    Likes Received:
    0
    Location:
    evansville, IN
    When the fresh air damper is redirected to recirculate the air inside the cab (on the max setting) the static pressure on the suction side of the fan is increased and the RPM of the fan increases to provide the same or slightly increased air flow. Thats why is seems like the fan is in 4th gear on a 3 speed. Hope this helps.

    79 K5, 3" lift, 400 cubes of nasty
     
  7. ScoobyDann

    ScoobyDann 1/2 ton status

    Joined:
    Mar 9, 2001
    Posts:
    305
    Likes Received:
    0
    Location:
    El Paso, TX (Far West Texas near Las Cruses
    What is Air Conditioning? I don't get it?

    <A target="_blank" HREF=http://jimjim.coloradok5.com>http://jimjim.coloradok5.com</A>
     
  8. Moose

    Moose 1/2 ton status

    Joined:
    Feb 17, 2000
    Posts:
    1,062
    Likes Received:
    0
    Location:
    Glendale, Arizona
    Guys hey. I pulled the kick panel on the passenger side and it has a vent like my 77. The only different is that is is vacuum controled. Mine stays closed when the air is on. Am I looking in the right place? Thanks.
     

Share This Page