Have brand new WLC and it makes loud noise time to time,
Fan RPM rates are normal
went to similar threads and a common fix was to change fan policy - performance
but unable to do so because it shows cisco fan policy override - card(s) cavium present
If your AP support 18.104.22.168 code I would upgrade to that & see.
thanks and we have AIR-AP2802I-E-K9, checked the download site
8.5.140 has been deferred
the recommended one is Release 22.214.171.124 but I do not find it on the matrix