CCR1036-12G-4S gradual fan speed increase

Hi,

A CCR1036-12G-4S (6.48.6) has seen gradually increasing fan speed for the past 2 weeks - from approx. 4200 to 7000 RPM. There’s also been a decrease in power consumption in that time. Attached some screenshots demonstrating the only notable changes.

I’ve got the colocation team to perform a visual check for any obstructions, but have not heard back yet.

Has anyone experienced this previously?

Many thanks in advance.
msedge_kjPXnl3aG9.png
msedge_aWNTp8EoHe.png
msedge_BX1EQh3NLK.png
msedge_f9zXo61N3R.png
msedge_pcs8s7egzf.png
msedge_kJyvuxjQ9H.png