Did you ever had your hotend-fan fail?
When mine failed it led to some stripped out filament and a failed print, but that was it. A nylon pull had the hot end clean and good to go again.
One of mine failed on my FF Pro, but by then I had all metal hot ends fitted (from MicroSwiss) so that may have prevented any problems. Turned out to be a broken wire, which seems quite common for FF Pros in various locations…
I had one fail and the printed mount of the coldend (groovemount) became distorted and I had to print a new one with another printer.