Hi, Same problem here. I received my new UM2 yesterday and one of the fan is extremly noisy. It's a pity to mount so cheap fans on a high end printer. I will try to play with the screws to see if it resolves the problem... Will let you know if it comes better!
For all the people who are disturbed by posts relating horrible stories about the customer care support and lead time of UM2, just take a look at this print-screen to get faith back in this company... Exactly 3 weeks and 3 days to get my UM2 with a bunch of filaments. And yes, I have the tracking number and the parcel is on it's way... So, it's definitely time to order your next 3D printer :wink: