aculab,

I'm sorry to hear that you're having these issues. The fan may be producing a normal noise if it's pushed against a wall. I'd recommend checking to make sure that you have the latest firmware update installed.

If you'd like to have the unit serviced, you could call 800-SAMSUNG or fill out an online request form here:

http://www.samsung.com/us/support/online/supportOnlineServiceRequest.do

--HDTech