My 2001 325i is having a problem where the fan stops blowing every now and again, and stays inop for anywhere from 30 minutes to 3 days before returning to normal operation. I can feel cold if I place my hand ON the vent, and the display operates normally. The fan will not blow on cool or heat during these times. I can here the A/C system kick in behind the dash, but no air comes out. It's 110 degrees where I live and I NEED HELP!!!! Thanks!!!