Almost all computers have heat radiators, which aid in cooling the Processor and preventing burning. But occasionally, the heat reservoir itself may get too warm. The air around the computer may become too heated or the Processor may be operating at maximum capability for a prolonged length of time, both of which can cause this.

As a result, a fan is frequently used in conjunction with the heat sink to maintain a comfortable temperature for the Processor and heat sink. Creatively referred to as a "heat sink and fan," or HSF. The blower pushes heated air away from the computer by circulating cold air across the heat sink. Every Microprocessor has a built-in sensor that monitors the processor's temperature. The fan or fans near the CPU may accelerate up if the temperature rises too high in order to assist in cooling the processor and heat sink.