straight from sony exact copy of email the persons name left out Hello Bryan, Thank you for writing us regarding the fan test. The fan will not remove dust that is in your system(s). It will not hurt any of your systems. All it is, is a force eject for a stuck disc and the fan comes on. Regards, Are you a member of the PlayStation®Network yet? Play games online, chat with friends, access exclusive titles, downloadable games, PS one®Classics, free demos, movies, TV shows and more! Highly connected and endlessly entertaining. Welcome to the PlayStation®Network. Join now!