I've had a couple of my Premieres fans make noises a few times, but this was only when I booted them up after being cold, from a trip in the trunk of my car. Once they warmed up the fans were quiet as normal.
Otherwise you can check out Weaknees for some replacement fans.
http://www.weaknees.com/tivo-fans.php
or DVRupgrade
http://www.dvrupgrade.com/dvr/stores/1/tivo-fans.cfm
EDIT: I guess none of the DVRupgrade fans are listed for the Premiere. So I guess it's just Weaknees for the Premiere replacement fan. Or get one from a computer parts store with the same specs.
You can also check out this thread about fans for the Premiere.
http://www.tivocommunity.com/tivo-vb/showthread.php?t=456669
Otherwise you can check out Weaknees for some replacement fans.
http://www.weaknees.com/tivo-fans.php
or DVRupgrade
http://www.dvrupgrade.com/dvr/stores/1/tivo-fans.cfm
EDIT: I guess none of the DVRupgrade fans are listed for the Premiere. So I guess it's just Weaknees for the Premiere replacement fan. Or get one from a computer parts store with the same specs.
You can also check out this thread about fans for the Premiere.
http://www.tivocommunity.com/tivo-vb/showthread.php?t=456669