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  1. #1
    skidplatebob's Avatar
    skidplatebob Guest

    30 something year old Carrier wiring diagrams



    I am trying to locate a wiring diagram and parts list for a Carrier 38HQ134300 compressor section and a 38HQ500254 outdoor coil section. I am having trouble with the defrost cycle and really need to make the repairs. I know its old but i really don't have the money for a new one right now. Please help me if you can.



  2. #2
    Brian_UK's Avatar
    Brian_UK is offline Moderator I am starting to push the Mods: of RE Site Moderator : and general nice guy
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    Re: 30 something year old Carrier wiring diagrams

    Haven't found your exact model yet but it's close, any good?

    http://www.docs.hvacpartners.com/idc...it/38hq-7w.pdf

    edit: If you also look in this sites directory there are a lot of 38HQ files, amongst all the others, don't know what's in them but might be useful..
    http://www.docs.hvacpartners.com/idc...ments/techlit/

    Good luck
    Last edited by Brian_UK; 17-01-2011 at 09:51 PM. Reason: Added a bit
    Brian - Newton Abbot, Devon, UK
    Retired March 2015

  3. #3
    skidplatebob's Avatar
    skidplatebob Guest

    Re: 30 something year old Carrier wiring diagrams

    Thank you very much! I will look at what you sent me. My main goal is to replace the mechanical defrost circuit with a defrost board, not sure how but i'm sure there are some available.

  4. #4
    Brian_UK's Avatar
    Brian_UK is offline Moderator I am starting to push the Mods: of RE Site Moderator : and general nice guy
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    Re: 30 something year old Carrier wiring diagrams

    Is this like yours?, Service Call 6.

    http://books.google.co.uk/books?id=e...page&q&f=false

    Don't know how much but...?
    http://mjbcontrols.com.au/index.php?q=node/7

    Interesting idea on a different scheme for a Carrier heat pump...
    http://www.gpsinformation.org/joe/HeatPump2.html
    Last edited by Brian_UK; 17-01-2011 at 11:35 PM.
    Brian - Newton Abbot, Devon, UK
    Retired March 2015

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