Results 1 to 7 of 7
  1. #1
    Join Date
    Jun 2005
    What is a hot (not warm) liquid line an indication of?

  2. #2
    Join Date
    Apr 2005
    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
    Fort Worth, TX
    Prematurely, inadequate subcooling.

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

    Just scattershootin', here.
    Building Physics Rule #1: Hot flows to cold.

    Building Physics Rule #2:
    Higher air pressure moves toward lower air pressure

    Building Physics Rule #3:
    Higher moisture concentration moves toward lower moisture concentration.

  4. #4
    Join Date
    Sep 2002
    South Dakota

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

  5. #5
    Join Date
    Sep 2002
    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
    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
    Dothan, Al
    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.

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts

Related Forums

Plumbing Talks | Contractor MagazineThe place where Electrical professionals meet.
Comfortech 365