So i was checking the fans on my Macbook. In istat, only the exhaust fan is listed, and in FanControl the one fan is at -1 RPM. Do i have a busted fan? My heat is generaly running between 80-126 F depending on what i am doing, and the fan listed is running at a normal 14-1600ish RPM. is it just not listing a fan, or am i in serious trouble?