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  1. #1
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    Undercharged vs overcharged AC symptoms



    As you might have noticed from my previous posts, I am an HVAC enthusiast, not a professional.

    So I am wondering what the symptoms are of an undercharged AC vs an overcharged AC. As far as I know:

    Undercharged:
    Poor performance (obviously)
    Suction line not very cold
    Suction and discharge pressures lower than normal
    Discharge line cooler than normal
    Liquid line cooler than normal
    Compressor amp draw less than normal
    Not much heat leaving the condenser
    Evaporator coil freezes up or has frost

    Overcharged:
    Poor performance (obviously)
    Higher than normal suction and discharge pressure
    Suction line colder than normal
    Compressor amp draw high
    Discharge line hotter than normal
    Liquid line hotter than normal
    Not much heat leaving the condenser

    Is that correct? Also, are there any other "tell tale" signs of either an undercharged or an overcharged system? Thank you very much in advance and sorry for the stupid question



  2. #2
    Brian_UK's Avatar
    Brian_UK is online now Moderator I am starting to push the Mods: of RE Site Moderator : and general nice guy
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    Re: Undercharged vs overcharged AC symptoms

    Mostly you are correct but can I point you towards a thread which should answer all of your questions.
    There's a lot of reading but it's worth it.

    http://www.refrigeration-engineer.co...rigeration+101

    The above thread will celebrate it's 10th birthday later this year.
    Brian - Newton Abbot, Devon, UK
    Retired March 2015
    Please support http://the100project.net/Home

  3. #3
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    Re: Undercharged vs overcharged AC symptoms


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