dwratchet
Dec 20, 2009, 10:07 AM
I am replacing an old ITT General Controls thermostat with a Honeywell RTH7500D. My heating system is a forced air gas furnace (no air conditioning). My old thermostat has 2 wires coming from the furnace, but there are no labels on the old thermostat. Both wires are white. I have no idea where to hook the 2 wires on the new thermostat. Any help would be appreciated. Thanks