Just installed a Ruud RGRL 2 stage furnace. I have used a single stage stat with the P7 on a time for hi. This time I am using a Honeywell Pro 6000 series
(6220) stat programed for heat 2, AC 1 for over 90%. and of course W & W2 are wired.... What's the easiest way of telling what stage my system (gas valve) is in. I am not sure if its going to Hi 100%. Buy the way the P7 is set to NONE.