Hi Guy's
This is an interesting topic, and a lot of folks miss understand the function of the AC in winter. The AC will cool the cabin temperature to the desired level during hot weather. However AC can be used all year round even in frigid conditions! It's not used to keep the temparture cool if it gets too hot, the cars automatic climate control will do that job on it's own. The function of the AC in winter time it to act as a kind of hudmidifer/ cleaner/ fresher/softer air inside the cabin as it works in conjuction with the heater. Without AC on in the winter the cabin tempature is very dry and uncomfortable. You all know what I mean, dry lips, tired eyes stuffy. Well the AC left on with the tempature set to warm or very warm will ensure the air quality is pleasant. So keep AC on and adjust the temparture to the level you want. To prevent misty windows make sure the temp control is NOT set to recirculate air !! This will fog up windows very quickly. remember at certain times windows will fog up but you should be able to clear this with setting the temp controls.
I hope this helps
Regards
Skidspan B)