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-   -   A/c compressor not switching on (https://www.askmehelpdesk.com/showthread.php?t=259853)

  • Sep 12, 2008, 05:53 PM
    damdash
    a/c compressor not switching on
    My dad has a 93 chevy cheyenne with a 4.3 v6. A couple weeks ago I added some freon to the system and everything was fine. After running the system for two or three days it stopped working. After looking over it I see the compressor is not kicking on. When I jump it, it comes right on. I can't find any relays or disconnected wires. What else should I be looking for to fix this?
  • Sep 13, 2008, 09:07 AM
    this8384
    Put some dye in the system and check for any leaks. If you lost all the freon that you installed, the compressor won't turn on.
  • Sep 13, 2008, 09:25 AM
    damdash
    I tried already and it won't take. That's when I decided to jump it.
  • Sep 13, 2008, 09:31 AM
    this8384
    Try replacing the pressure cycling switch. If it's not reading properly, it thinks the system is empty and keeps the compressor from turning on.

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