The wires are still connected to my thermostat i need to know about the connection to the furnace.i have 2 blue wires one marked with ++++,the other blue isnt marked. 1 red wire +12v.1 yellow wire -12v. The white is hooked to the yellow. The red and 2 blues are unhooked. My thermostat wires are red - hot,green - ground, white- furnace, blue -hi fan, brown- fan.there is 1 blue wire coming from wall and a brown thermostat wire that has a red and a white in it.
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