I have noticed that my A/C always keeps popping on when I turn on the defrost button and or the recirc button as well. Is this just the way they set these to work in the factory or is this a issue with my car? So someone please try this if they could. crank the heat up full blast to 90 then leave it on floor or vent or either doesnt matter then hit the defrost button, not the front or rear but the defrost button and the A/C will pop on. Another time this happens is if you are in any mode and hit the recirc button instead of outside air it too puts on the A/C button. Please let me know if any of you have this issue as well. Im wanting to recirc the air in the car to heat it up faster but when the A/C pops on im afriad indeed the A/C is running thus giving me colder air as well as crappier gas mileage. Any thoughts or help would be great.