If the fan motor is working, at high speed the noise should be quite loud. If air is not getting to the vents, it could be due to a bad motor fan blades. You would need to remove the motor to check. The other possibility is clogging or leaking. If air is blowing hard under dash, it is due to a leak in the system.
Underdash there are some cables from the vent control panel. Ensurs all cables are attached correctly and moves when the vents lever is moved to change position.
Friday, January 28th, 2011 AT 8:30 PM