We recently purchased a used 3660 and we get the following entries in the logs: 00:22:33: %FAN-3-FAN_FAILED: Fan 6 had a rotation error reported. 00:23:03: %FAN-3-FAN_OK: Fan 6 had earlier reported a rotation error. It is ok now This was originally happening just with Fan #6 so we replaced the fan assembly and we're now seeing it with all fans. We put the first assembly back on the router and the behavior continues. Have any of you seen this on 3660 routers? Is this a fairly common issue? The fans are all spinning but the error seems to indicate that they're not spinning at the proper speed. I'm not very worried, just annoyed. I've searched CCO and can find no mention of this sort of behavior except in the context of a truly failed fan. Any thoughts? Thanks, John Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=5616&t=5616 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]