Enermax warranty, last I checked, is 3-years. So OP should contact them for a RMA.
And a poor RMA they have from my experience.
Bought a Noisetaker quite a whileback now, fitted into PC nicely, all working well.
All of a sudden, BANG!! and a huge mushroom wafting up into my cieling as i sat they still recovering from the scare(luckily it took nothing else out). Sent it back and got a replacement of which the fan was not working. Contacted Enermax directly, of which support simply could not get their head around it, spent 3 days emailing back and fourth asking me to carry out all sorts of tests, to which i finally lost my temper advising them i bought a new PSU so i could game, and not have to stats crunch to the manufacturer, in the end they asked for it to be sent back. I did with a note advising not to bother sending me another one.
OCUK were very good with the return themselves, but the guys at Enermax didn't meet my expectations of good customer service.
End result....bought a Corsair HX620 - best thing i ever did,