If you need to change the Dryer Main Air Fan on either the 64058Txx, 72072Txx, or the 50040Txx model dryers there are two ways to accomplish this. One is through the top of the dryer, and the other is through the bottom of the main air blower through the external access panels on the dryer. The attached procedure is for the bottom access and we believe it is the easiest method to accomplish this task.