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1998 air conditioning

Discussion in 'Chevy Trucks' started by jb1390, Mar 26, 2010.

  1. jb1390

    jb1390 Senior Member
    Messages: 710

    The air conditioning in my 98 has not worked for some time. It worked when I got it, but since an intake manifold swap it has not worked. I cannot find any blown fuses, and everything is hooked up correctly. The book is not much help with diagnosing this sytem-are there any ways of testing one component at a time? The clutch is not cycling-though the light in the cab is on. Can I just apply 12v to the clutch to see if it engages and go from there?
     
  2. 2COR517

    2COR517 PlowSite Fanatic
    Messages: 7,115

    You need to start with a pressure reading of the AC system. You can buy simple gauges pretty cheap. I would get the two gauge three hose deal. Makes trouble shooting and filling the system much easier.
     
  3. jb1390

    jb1390 Senior Member
    Messages: 710

    Would incorrect pressure prevent the clutch from engaging?
     
  4. 2COR517

    2COR517 PlowSite Fanatic
    Messages: 7,115

    Yes. There is a low pressure cutout. It prevents the compressor from running without refrigerant, and therefore lubrication.
     
  5. jb1390

    jb1390 Senior Member
    Messages: 710

    Cool-I think I will try charging it a little bit and see what happens. I have a couple of those quick charge kits at home, that would be an easy solution.
     
  6. 2COR517

    2COR517 PlowSite Fanatic
    Messages: 7,115

    Sometimes that's all it takes. Good luck.