When you switch on the computer and start working for some time you would notice the heat that is been produced by some parts of it. In order o cool down these parts and to ward off the heat the fans are used in the computers. The main cooling agent in the computer is the CPU cooling fan. If the heat that is generated is not dispersed then it might cause some serious damage to some parts of the computers. Even though the computers are designed in such a way that suits this generation but still in order to reduce the heat from it the special cooling agent is always been used in it.
Some of the main functions of the CPU cooling fans are it puts out the heat and allows the fresh air to come in to the system. These cooling fans are been fitted in the mother boards and even on the hard drives. There are about some 3 to 4 fans on the central processing unit. In those days the computers were designed in such a way that there would be the only ventilation made of aluminum sink with some fans attached to it. But that would not be enough for the computers that are in nowadays. Nowadays the computers are used for around 12 to 15 hours a day so aluminum sink would not be enough for it to provide sufficient ventilation. So the cooling fans were introduced and it was proved that it is very economical and efficient in order to use the computers for longer time.
The main function of the cooling fan in CPU is to keep the Central Processing Unit cool. But there could be some obstruction in the functioning of CPU cooling fan such as Dust. The Dust settles on the blades of the fans in order to reduce the functioning capabilities. It would also require the regular maintenance in order to keep the CPU cooling fan in the working condition.