Has anyone found a good automotive AC diagnosis chart? I can find some suggesting pressure ranges, and even temperature and pressure ranges, but I cannot find a good source which also includes diagnosis of dryer, expansion valve, and other components.

Any good recommendations?

  • Plot the cycle on an H-S diagram.
    – Solar Mike
    May 24, 2021 at 17:29
  • @SolarMike that is a great idea. I was hopeful that the answers might create a foundation for a FAQ or something similar, which could be of general use to many. If you have any diagrams, could you include them in an answer, please?
    – mongo
    May 24, 2021 at 18:44
  • It was advice for you, any decent thermodynamics textbook has examples.
    – Solar Mike
    May 24, 2021 at 18:57


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