Originally Posted by double D
Just tried thermostats. How do I get aux. position? All the buttons are fan,cool, furnace, and the other side is plus and minus for temp. The bottom button selects fan,cool and furnace, but I see no aux. ?
Select the Fan, on the plus/minus temp side press up or down until the display says Au which stands for Automatic.
once selected, switch the thermostat to Furnace. only the furnace should come on. not the overhead unit. if you have 2 furnaces you will have to do this at both thermostats.