We have a NEST stat controlling a hot water radiant floor as 1st stage, and forced hot air as 2nd stage, which means the fan must turn on for 2nd stage. Instead the stat defaulted to both stages being radiant floor. Homeowner's set up does not prompt for this radiant and forced hot air combination, but the iphone app shows that its probably possible. We have 40yrs hvac experience here, but no keys to the googlestat. Need help.
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