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  1. #1
    Join Date
    Jun 2005
    Winston-Salem, NC
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    Question Trane mercury stat question

    I went to change out a trane heat pump mercury thermostat for a relative and remembered that I never found out what the extra terminals on a Trane stat were for. I have X2,O,G,Y,T,R,W,U,F,B. What are the X2,T,U, and F terminals for? I like Trane stuff, yet I think they make things more complicated than needed, although not as bad as lennox.

  2. #2
    Join Date
    Mar 2004
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    No diy on the site.

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