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  1. #1
    Join Date
    Jun 2005
    Posts
    66
    What is a hot (not warm) liquid line an indication of?


  2. #2
    Join Date
    Apr 2005
    Posts
    36
    It's not a reliable indicator of anything without actual measurements.

    You need pressure and temprerature readings for us to make any guesses.

  3. #3
    Join Date
    Aug 2003
    Location
    Fort Worth, TX
    Posts
    11,283
    Prematurely, inadequate subcooling.

    Cause of inadequate subcooling...dirty condenser, undercharge, etc.

    Just scattershootin', here.
    • Electricity makes refrigeration happen.
    • Refrigeration makes the HVAC psychrometric process happen.
    • HVAC pyschrometrics is what makes indoor human comfort happen...IF the ducts AND the building envelope cooperate.


    A building is NOT beautiful unless it is also comfortable.

  4. #4
    Join Date
    Sep 2002
    Location
    South Dakota
    Posts
    6,579

    It us usually a sign that hot gas is leaving the condenser and entering the liquid line.


  5. #5
    Join Date
    Sep 2002
    Posts
    4,970
    Guess I never really thought about that as a bad thing if I was really pumping out a lot of heat.....Hummmm maybe I should rethink that lol

  6. #6
    Join Date
    Jan 2005
    Posts
    152
    I know of an apartment unit, just replaced last year, that suffers this problem. The liquid line is indeed much hotter than it [should be], given the 70-degree outside temp that was present when I looked at it. I have no quantitative measurements, but just comparing this apartment system to my system at home, whos liquid line doesn't get 'hot' until the temp approaches 95 outside.

    Inside, the tempurature delta cannot possibly be anywhere near 20degrees.

    BUT... The conndenser unit is the kind that blows the hot air out right above the intake, and I know it's sucking all that hot air back across the coil; THIS would also account for a hot liquid line.

  7. #7
    Join Date
    Feb 2005
    Location
    Dothan, Al
    Posts
    3,453
    Hot liquid line means high condenser pressures
    Condenser not taking out all heat
    No other reason for line to be hot - should be amient temp.

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