ac cycling no codes
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Cadillac Seville / Cadillac Eldorado Forum Discussion, ac cycling no codes in Past Cadillac Vehicle Discussion; I have an issue where my ac started cycling on and off.checked codes, no acm codes, hooked up gauges pressures ...
  1. #1
    x2xplaguex2x is offline Cadillac Owners Member
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    ac cycling no codes

    I have an issue where my ac started cycling on and off.checked codes, no acm codes, hooked up gauges pressures read 45 psi on the low side and 250 on the high side when I jump the relay.the cycle event is a.c.kicks on for 3 seconds stays off for a few minutes and repeat any idea s I attached a volt meter on the green wire on the ac relay and it's getting power so that means not a issue with low or high pressure switches or this circuit would be open, has to b a temp sensor our pcm control, does anyone know if the Cadillac has the ability to read live data from it's several temp sensors particularly the high/low /evap? Thanks

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    Submariner409's Avatar
    Submariner409 is offline If it won't run, stick on fender vents
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    Re: ac cycling no codes

    Sounds like the refrigerant charge is just a tad low. Not much .................

  4. #3
    x2xplaguex2x is offline Cadillac Owners Member
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    Re: ac cycling no codes

    You would get a code if that was the case, not to mention the low pressure is side is 45lbs which is in spec for the temp that day, the low pressure switch will only disengage the compressor if it's 2lbs our lower or it detects to large of a temp in the refrigerant line aka refrigerant boiling in the line, also that low pressure was with the compressor running,I jumped the relay and let it run

  5. #4
    x2xplaguex2x is offline Cadillac Owners Member
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    Re: ac cycling no codes

    I resolved my issue, it was the temp sensor after the orfice reading 7k ohms which means 32 degrees or so and the acm thought it was doing it's job invade anyone else gets this issue

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