New Vibration Noise when Mac Mini 2009 is idling at 1500 rpm

[Raoul OC]

Folks

I busted the temperature monitor in my Mac Mini 2009 when I upgraded the hard drive. The fans went full blast and stayed there until I discovered this great product. My fan speed/temp control problem was fixed.

Last night I noticed a "vibration" sort of noise when my Mini was idling at 1500 rpm. It sorta sounds like the fan blade is loose in it's housing and vibrating in position as it spins.

To be clear, temperature and fan control is working perfectly. This noise is a new problem.

Does anyone recognize this symptom and have a solution they've tried that helped?

Thanks!

[Steven]

Raoul OC
I'd disassemble your macmini and clean up the fan