Originally Posted by jphughan
I'm pretty sure this is wrong, otherwise how would that be any different from the recirculate button? That would mean there are two ways to manage recirculation for the front vents and only one way for everything else?
I'm pretty sure that the winter driving scenario you observed wasn't because it was letting outside air in. Rather, it was doing exactly what I described above, namely heating the rest of the cabin but blowing cool air through the front vents since you had it on the Cold side.
I've talked to a few of my colleagues and that is what they told me. I just leave mine on the Blue regardless lol. Maybe I'll shoot corporate an email seeing if they can get me a 100% correct answer