Yesterday the heat in my driver's side seat in my 2000 9-5 got stuck on high, regardless of the switch position. It's also much warmer than it's ever been since I got the car used a few years ago. I currently suspect the switch, since it seems it's never been going to high all these years and is now stuck on high. Anyone know what would cause this? I have unplugged the heat switch and will see tomorrow if the heat is still on.