there are a few things you can try first is to reseat the fan plug . This involves taking the back of the computer then finding the fan and simply unplugging it then plugging it back in. while your there you can reset the memory so it has a clear clean boot . This is done by disconnecting the battery and then pressing down the power button for 60 seconds . you can do this when you unplug the fan . This video will help with opening the laptop
https://www.youtube.com/watch?v=egbkSCGRbLc
You dont need to remove the battery just unplug it will do.
Hope this helps