the link to photobucket was wrong, please try this one.
http://s1339.beta.photobucket.com/user/mwcassedy/media/Furnace_zps6521c4c3.mp4.html
http://s1339.beta.photobucket.com/user/mwcassedy/media/Furnace_zps6521c4c3.mp4.html
Try to rotate the squirrel cage by hand and feel for anything but smooth. Of COURSE, turn off the power first.Thanks for your reply jvegas. I think we have different issues, my noise is a repetitive thumping that lasts for 60 seconds and sounds like an off balance wheel spinning/banging or a fast firing automatic machine gun. Not the same sound but repetitive until the unit completely shuts off. You can hear the sound on the photobucket viedo I posted.