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where are my AC guys at? Compressor cycling

Discussion in '1st Gen. Tacomas (1995-2004)' started by COMAtized99, Jan 5, 2018.

  1. Jan 5, 2018 at 4:25 PM
    #21
    FirstTimeFirstGen

    FirstTimeFirstGen Less active than most

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    Not enough to have a build thread.
    I'd say that its quite possible. But if that was the case, I'd assume jumping the cycling switch would still force your compressor to run
     
  2. Jan 5, 2018 at 5:34 PM
    #22
    Timmah!

    Timmah! Well-Known Member

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    I'm with @tony2018. Why not hook up a manifold gauge set and see what the pressure is on the low and high sides of your AC system. Knowing these pressures could help you diagnose your problem. I know you've said by jumping the pressure switch and getting the same results means your refrigerant level is fine. But, the symptoms you are describing sure sounds like the compressor is short cycling due to low refrigerant. Hook up a manifold gauge set and check you pressures. Maybe this video my buddy Sean and I could help you out.

    https://www.youtube.com/embed/zlRE0Zeeyrc
     
    Last edited: Jan 5, 2018
  3. Jan 5, 2018 at 9:53 PM
    #23
    DrZ

    DrZ Well-Known Member

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    Sounds like it's working correctly given the outside temperature. The compressor stays on until the temperature in the evaporator core gets cold (like 32-36°), then it shuts off. If it let the evaporator core get below 32° then it would freeze up with ice and block all the air flow.

    The pressure switch just prevents the compressor from running if the freon pressure is too low (not enough freon) or too high (car condenser/radiator overheating). It doesn't control the cycling of the compressor. Some cars have another freon pressure switch to turn on an electrical condenser fan.

    Anyway, if you want to keep the compressor clutch on, an easy way would be to jump the appropriate terminals at the magnetic clutch relay. I'm not sure how it's labeled. Or apply 12v directly to the magnetic clutch connector terminal.
     

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