Thats crap, you just bought it? Regardless I would absolutely return it. Either return/exchange it where you bought it from or contact Corsair. They are suppose to be VERY good with RMA's and customer service. They will probably replace that or just send you a brand new one for free. That's not right though, you need your fans working and besides that it can cause electrical problems down the road. Trust me I've had a faulty fan module one blow up on me and it did not end well.
Yup, I just bought it... The backplate is also loose (I had to use rubber washers to fix it). Alright, thank you very much for the help!