I have a feeling that I have encountered the same problem as you, unfortunately I just closed the door and ignored the noise, it was still drying the clothes so it was no big problem. It has turned out to be a silly mistake as now the drum is not going round at all.
(definately not a broken belt) We have now tightened the fan in question which was extremely slack, but it has not solved our problem.
the moral to this tale i think is dont use your dryer again untill you have the fan tightened.
(Bill if you could offer me a little advice, i would be greatly appreciative.)
Good luck debbie
sharon
April 2007