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  1. #1

    Tired of having parts changed

    Trane 5 ton heat pump older model.
    Started off that in heat when unit came on in heat after a minute went into by pass. Loud noise, High Pitched.
    First the reversing valve was changed. Then expansion valve was changed. Still doing same thing. Only does this on heat. After a few minutes compressor quits but fan on top and air handler still running. A/c guys can't figure it out.

  2. #2
    Join Date
    Jul 2007
    Location
    Mount Airy, MD
    Posts
    7,281
    Quote Originally Posted by D Pritchard View Post
    Trane 5 ton heat pump older model.
    Started off that in heat when unit came on in heat after a minute went into by pass. Loud noise, High Pitched.
    First the reversing valve was changed. Then expansion valve was changed. Still doing same thing. Only does this on heat. After a few minutes compressor quits but fan on top and air handler still running. A/c guys can't figure it out.
    Indoor coil CLEAN, filter clean, airflow changed any?

  3. #3
    Yes, Yes, and no. air handler is fine.

  4. #4
    Join Date
    Mar 2009
    Location
    Several Miles from Sane
    Posts
    1,458
    I second Chris W's comments. Just how cold is it outside when this happens ?

    From your description the "A/C Guy" is a replaceman rather than a repairman.

    I suggest checking the Contractor Locator Map for Professionals in your area. If there are none close I would then look for a Service Contractor that does both Residential and Commercial (with emphasis on Commercial and specifically heat pumps). You need a quailfied professional not a "Parts Changer".
    If sense were so common everyone would have it !

    All opinions expressed are my own. Any advice provided is based on personal experience, generally accepted fact or publicly available information. As such, it is worth exactly what you paid for it, not a penny more not a penny less !!

  5. #5
    Join Date
    Feb 2010
    Location
    In a boiler room
    Posts
    7,119
    Maybe you need to get some heat pump guys then.

    Make sure the indoor coil is a match and has a HP TXV.

    Ask them how much airflow you have across the indoor coil. You need to be close to 400 Cubic Feet per Minute (CFM) per ton.

    If you have 200 CFM per ton for example, you will certainly have the problems you are describing.

  6. #6
    Join Date
    Feb 2010
    Location
    In a boiler room
    Posts
    7,119
    And yes, get a real pro that can actually diagnose what exactly is wrong and replace just the correct part.

  7. #7
    Thanks!

  8. #8
    Join Date
    Dec 2002
    Location
    SouthEast NC ICW & Piedmont Foothills
    Posts
    7,635
    who's throwing parts at it and not diagnosing the problem?


    tell them to STOP!
    It`s better to be silent and thought the fool; than speak and remove all doubt.

  9. #9
    Join Date
    Feb 2010
    Location
    In a boiler room
    Posts
    7,119
    Quote Originally Posted by dandyme View Post
    who's throwing parts at it and not diagnosing the problem?


    tell them to STOP!
    ^^^Wise words.^^^

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