A/C blower motor noise

I just got my truck last week (2010 SE 4x4). Every time I turn on the A/C it sounds as if the plastic bearing in the blower motor is clicking. Sound is pretty faint, but still very annoying. Wanted to know if anybody else had experience like this. This is my first Nissan, so didn't know if this was just how they sound, or if I should take it back to dealer for repair.