Question:Where on the furnace controller board, does the flame sensor(orange) get * what pin number on the 9 pin connector, the wire popped loose so the main burners are not get- ting * could the flame sensor be the * Thanks. Tshooter32
some controllers do not use the flame sensor wire, they use the ignition wire to sense. You need to know what manufacturer and the wiring schematic, but I have found that an additional ground is quite helpful from the burner assy. to the controls.