I'm trying to replace a 5 wire Honeywell (round Mercury) thermostat with red, yellow,green,white and blue (the orange and black are cut short and not used) with a digital Honeywell thermostat. We have a heat pump system. I have the green, yellow, blue and red connected in the Y,G,O/B and red terminals but what terminal does the WHITE connect to?

Asked by Christine on 04/18/2015 1  Answer

ManualsOnline posted an answer 9 years ago

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