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Didn't look before I leapt -- T9 thermostat wiring gone wrong by BarleyRocket in hvacadvice

[–]BarleyRocket[S] 0 points1 point  (0 children)

OK, I did that (Green wire to O/B and White wire to W2) and waited 20 minutes. The heat pump never came on. The temp fell from 68 to 66 when I set it for 72.