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cat 259d3 a/c inop

mobile-tech · 2026-06-03 09:28

looking for wiring diagram for cat 259d3 serial CW903327 ac inop , full charge , pressure switches check out and freeze switch or t stat in hvac box , have supply power to compressor relay , no ground at relay or signal to relay to energize compressor clutch thanks

Replies7
  1. #1Nige2026-06-03 09:41

    Check your message inbox.

  2. #2yz5582026-07-05 15:10

    Any chance you could share with me as well? Have not installed gauges as I have the machine away form the shop but will be putting gauges on tomorrow. CW907138

  3. #3Nige2026-07-05 15:35

    Check your message inbox.

  4. #4Tyler d4c2026-07-05 19:10

    Is the switch on i have to relearn once a year that it has to be on to get ac (im slow at times)

  5. #5yz5582026-07-05 19:18

    Thank you Nige! Yes it’s in the AC position.

  6. #6smifwal2026-07-06 20:43

    Last time mine wasn't working there was a small rock blocking the little tubes that let it condensate, worth a look if everything checks out I have a 2021 259D3

  7. #7yz5582026-07-06 20:56

    Found the issue once we started to pull vacuum. Condenser line at the door hinge had a break in it. Picking up a new line Wednesday, pull vacuum for 30 minutes and if all is well recharge and see how she goes. Thank you all for the assistance.