FAN BLOWS CONSTANTLY TILL YOU PULL THE FUSE, REPACED FAN MODULE STILL BLOWS EVEN WHEN THE CAR IS OFF. NO AIR COMES OUT OF THE VENTS???
A/C FAN on 2004 Cadillac Escalade
If you are referring to the fan inside the car, then you need to have a scanner put on the Climate Control System and see what the data stream says. There is computer that controls your system.