Are your Unifi APs sounding like an old hard drive? Extended out-of-warranty RMAs opened up for "ticking and scratching" issues.

Found this after getting some user complaints about a "loud access point" (rolling my eyes, then being surprised it was actually quite loud when I looked at it) and figured I'd pass it along.

If you have any Unifi Access Point that is making clicking, scratching, ticking noises (like an old HDD) they will honor an RMA even if you're out of warranty period.

See : https://community.ubnt.com/t5/UniFi-Wireless/UAP-PRO-ticking-and-scratching-noise/m-p/1423331/highlight/true#M134279