If you want to see a computer cooling fan, all you have to do is open up your computer. Every computer has a cooling fan inside the case, designed primarily to prevent the CPU from overheating.

Cooling fans may bring cool air into the computer, draw hot air out of the computer, or as part of a heat sink, which is a special product designed to draw heat away from a particular computer component.

Your computer’s components are very sensitive to temperature, and if things get too hot in your computer case, it will start to overheat and shut down.