Originally Posted by badwolf
Mine was set between the noon (defrost) and the floor which is where I usually have it when it went cold after the restart.
A/C automatically cycles on and off in order to adequately defrost the windshield and side windows. Leaving the vent selector 100% in the face or feet mode is when it will cycle strictly warm or cold air when the a/c button is off. If the a/c button is on, it will cycle warm/cool automatically according to the temperature, and if it's a Pure there is a sort of auto program that is predetermined not being based on the actual temperature inside the car.
There is some intelligence with the climate control systems.