Don't turn it to the last position. If you look closely, you'll see it turns Max A/C on when you put it in the final cold position. If you adjust one position clockwise, A/C shuts off and you're good to go.Similar question, but perhaps OT: If I just want the vent on, I found that the AC kicks on if I change the temp dial to its coldest. I press the AC button but it won't turn off. Any tricks for this?