Patent ID: 7466934

Claim:
A method of controlling a fusing temperature of an image forming apparatus having a fan to ventilate an air from or to an outside, the method comprising: counting an accumulated number of sheets of paper printed in response to print commands; lowering a set point of a fusing temperature and controlling the fan to increase an amount of air to be ventilated when the accumulated number of sheets of printed paper is greater than a predetermined value; counting the accumulated number of sheets of paper printed in response to print commands, setting a set point of the fusing temperature of a fusing roller at a second value, when the accumulated number of sheets of printed paper is equal to or less than the predetermined value, and turning the fan off; and resetting the fusing temperature of the fusing roller to a third value, lower than the second value, and starting the fan and controlling a fan flow rate at a fourth value when the accumulated number of sheets of printed paper is greater than the predetermined value.