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  1. #1
    Join Date
    Dec 2001
    Woodstock Ga
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    i have a problem with the 8570 stat. when the dip switches are configured for h/p operation, y is not energized in heat, only w2... changed stat, same thing. you guys ever see this before?
    In the land of the blind the one eyed man is King! semper fi

  2. #2
    Join Date
    Jan 2003
    Kansas City
    Post Likes
    I am not familiar with this thermostat, but some multi-use thermostats require a y1 to w1 jumper for heat pump operation.

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