I usually leave my Mac Pro on 24/7 and I went on a trip a few weeks ago. Sometimes during my trip my Mac Pro crashed. I got home yesterday to find the fans blowing at maximum speed. I've tried a SMC reset that didn't do anything. I'm thinking a thermal sensor is broken, but iStat doesn't list anything as over temp… I'm wondering what I can do at this point, and it's just out of AppleCare by a few months (though a lot of parts where replaced the week before AppleCare ran out).