Hi everyone, I just had a brand new Carrier Infinity series installed. The install was finished about three days ago. One thing I've noticed is that when I change the thermostat temp more than two degrees the Aux heat kicks in with the heat pump. In the settings there is an option to use "heatpump only" should I use this setting? The set up is a 3 ton unit for the first floor and a 2 ton split unit for the second floor. I have 3 wells at 300' each. This system has a desuperheater that is not active yet because our old heating system was oil. I still have about 100 gal of oil left so my old oil furnace is still heating our hot water but will eventually be taken out and hooking up the desuperheater. Would this be affecting the system to kick on that aux heat? or is that just standard if you attempt to change the temp higher than two degrees? Please let me know if you need anymore information.