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-   -   What modifications are needed to make a new thermostat work on a two stage cooling he (https://www.askmehelpdesk.com/showthread.php?t=683548)

  • Jul 16, 2012, 03:55 PM
    ashinhurst
    What modifications are needed to make a new thermostat work on a two stage cooling he
    My boss has a heat pump problem. He is replacing his thermostat, his old t-stat has a Y1, W1,W2 wiring configuration. What modification need to be done to make his system run this model t stat (Honeywell RTH7400/RTH7500)?

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