pool_shark_dc
New Member
got rid of older furnace for a little newer one. must have bumped something cause i got a wire that's not hooked up. i got an M1MC 077A BW. i will add attachment for wiring but i got gray wire that according to the diagram is supposed to go to 24v to the tstat. this diagram shows 4 stat wires of gray, red, green and white. my stat has yellow, red, green, white and blue(not used). am i supposed to hook up the gray to the yellow ?? prolly shouldnt have but i had the power to the furnace on and i connected that gray wire to the yellow wire from my stat and the furnace blower just kicked on and didnt go off. am i missing something? the gray wire in question is the wire in the middle of diagram that goes through the top