Has anyone else had a problem with the AC button turning itself on automatically? It was cold last night so I had the heat on and I look down and the AC button is lit up, I clicked it to turn it off, thinking I might have slipped and hit it on accident. So today I get in and its on again. Is it burning more gas even though its on the highest heat setting but the AC button is still lit up? Or is this something not to worry about?