Exhaust Fan sucks in more air than it expells

A bit off topic but the mainboard fan that Bambu sent me a few weeks ago to replace the original is.now also dying. The same loud grinding sound and it keeps starting and stopping.Between this fan, and the crappy loud “exhaust” fan my X1 sounds like hell. Terrible!

Exactly right froboz If a single ply Kleenex can completely block off the exhaust fan then we have even bigger problems.

The replacement mainboard fan that was sent ato me a few weeks ago is already dying. Same loud grinding sound,.and fan spins up and stops continuously. This printer has had a bad parts placed already,.some that were DOA. I’m getting tired of this.

Its not an enclosed box. Know that area in the back where it poops the filament out? There is more than enough area there for it to pull air in.

I also did some non-scientific tissue tests about the chamber fan, but videos are on FB: