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    levesterc's Avatar
    levesterc Posts: 3, Reputation: 1
    New Member
    		  
    #1

    Oct 25, 2007, 10:51 AM
    change old honey with new thermostat
    Yes: I have a two stage hear pump and I finally got a two stage thermostat model # rth7400.

    the old wires were ( y=yellow g=green 0=orange r=red w2=white and x=gray )
    the new 7400 connection are C G Y O/B Rc R Aux E
    I have tried (yellow to y) ( green to g) ( orange to o/b) ( r to r w/jumper rc) ( white to aux ) ( gray to c and e) only blow out hot air when set to cool.

    what can I do to get this working. It seem to be a wireing problem but I don't know which wires are for what.
    hvac1000's Avatar
    hvac1000 Posts: 14,540, Reputation: 435
    Heating & Air Conditioning Expert
    		  
    #2

    Oct 25, 2007, 12:17 PM
    See if there is a sticky note for this at the beginning of this board.
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