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  1. #1

    Need help with TRANE unit

    Having problem with unit. It had the compressor replaced about a year ago and has not cooled properly in a while.
    It has dual compressors with dual evap and cond coils, Shared blower and fan. Charge is correct, weighed in to specs, I'm not sure about the metering device because the high pressure gas enters a manifold on the entrance to the evap and it doesn't have a txv valve. Sub-cooling good at 10 deg. but super-heat way off...about 35 deg. back pressure around 55-60 psig. I was thinking, well, guessing that the filter may be loaded but there is no temp diff. across it.
    I am a newby to this field and could use some advice....Thanks.

  2. #2
    Join Date
    Dec 2008
    Location
    Buffalo NY
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    3,008
    Did you check the filter?
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  3. #3
    Join Date
    Dec 2002
    Location
    SouthEast NC ICW & Piedmont Foothills
    Posts
    7,619
    you need to verify the actual psi on each side of drier




    had a bad drier without any temp differential couldn't tell until psi was verified
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  4. #4
    Air Filter is new.

    I will have to sweat fittings to check pressure on each side, So if I have to get torches out, I'll go ahead and change filter/dryer.

  5. #5
    Join Date
    Dec 2001
    Location
    Chicago, N/W burbs
    Posts
    8,004
    Try changing the drier, if that doesn't do it then you'll need a new evaporator manifold. I would just get a new evap coil and be done with it but, that's when I'm not paying for the coil.
    R2B4BTU

  6. #6
    Join Date
    Mar 2008
    Location
    NC
    Posts
    1,445
    I agree with otto. If it's a ycd, seen the evap orifices gunked up after a burnout.

  7. #7
    Join Date
    Feb 2008
    Location
    Waffleville
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    10,339
    general forum???
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  8. #8
    Join Date
    Jan 2004
    Location
    Lancaster PA
    Posts
    66,765
    Sorry, this is not a DIY site. So we are not allowed to give out advise of this nature.

    Since answering your question in the open Residential Forums would be posting instruction for DIYers that may read this post later.

    If your in the trade, get your post count up to 15, and apply for Pro Membership.
    Use this link Apply for Pro Membership

    Once accepted, you have access to the pro tech forums. Where you can ask and get answers to technical questions.

    Plus, you also have access to the Pro Educational Forums.

    All of it is free.

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