Originally Posted by Katielane
Thanks, I already tried that. Is there a way to check whether the SMC was reset? I think I'm doing it right but nothing happens.
There's no indication given that it's been reset unfortunately.
Have you installed any temperature or fan software previously? If so, it may be installed in a location that overrides the SMC so the fans keep running high.
Also, have you perhaps done a hard drive upgrade or something inside the machine and forgotten to reconnect a temperature sensor?
If no fan software has been installed and no upgrades done, you can try installing fan control software. There is a package called Fan Control:http://www.lobotomo.com/products/FanControl/
It lets you control the minimum fan speeds at all times. So if your machine is sitting at 40C, you can tell it to spin at 1000rpm.