a while back i decided to upgrade our old honeywell thermostat with a new digital one. i fould that there was an extra wire though so i didnt install it. i called the manufacturer and they were no help. i dont remember now which wire it was that was extra but the wires that are currently there are: W1(white) G(blue) Rc and Rh on same wire(red) Y2(orange) Y1(yellow) i think the extra wire was the Y2. i am wondering if both can go to the Y terminal, or if there was something else that can be done. the manufacturer said they didnt have a thermostat that had Y1 and Y2.