Mine starts spinning up the fan (theres kind of a pattern as to when), heating up the entire computer. The computer previously had been fine. I usually have to

Mine starts spinning up the fan (theres kind of a pattern as to when), heating up the entire computer. The computer previously had been fine. I usually have to restart and reset the "SMC" to stop the fan from nuking the computer. I can let the computer drop to 5% battery life and the fan will turn off and the computer will cool down. Which is the opposite of what you want if it was actually overheating.