I have owned a 2004 Crossfire for about a year now. Lately, it seems like the blower fan has a mind of it's own. When I start the car, the fan will be running in what I would consider a normal speed. It will suddenly speed up, sometimes for a few seconds, sometimes for several minutes, and the slow back down to the original speed. It doesn't seem to matter if the a/c is on or off, nor does it seem to be temperature dependent. When the fan speeds up, moving the fan speed switch still increases or decreases the speed, but it continues to run even on the '0' position. I'm not sure if this is as designed, or if there's some type of issue.