I just put a new build together with this same case and have the exact same symptom. I contacted Newegg and they credited me $10 so that I could purchase another 140mm fan. (couldn't do an RMA cause I had already submitted the rebate). So far outside of this I love the case. The lights up front are awesome!
Hi There! E-mail me at VIP@antec.com, we can send you a replacement fan for your case. Thanks