2002 T&C internal Fan speed issue

i have heard.... under dash, remove bottom cover of fan and clean bottom bushing of dust dirt n oil . viola.. it works again just rumor it is .. i havnt done, but i do remember seeing the cover with a round depression about 2 inches round under the dash near the center , and reading about this issue in this blog or tweet or whatever it is goo luk & let me know thanx

it turned out that it was the heat/air resistor switch located behind the glove compartment. easy fix and run like a champ. thanks for your input.