Hey guys, Recently bought a new 21 inch Imac and I'm having problems with the fan since day one I have this machine. I've been actively browsing these forums and I am having the same faint fan rattle as some forum users have been experiencing (the rattling fan sound, which some ppl even uploaded as a sound file). However, I didn't call Apple yet because if I reset the SMC the problem dissapears and the fan is quite again. And then it's always the same story, it is quite for some time but then the fan begins making noise again. (and then I go through the same routine over and over...) Is this just a bad fan and should I ask for a replacement? Or does anyone have a solution for this? Thanks!