Patent ID: 8011921

Claim:
A method of controlling a boiler, which detects an abnormal combustion state using an air pressure sensor and a flame detection unit, the method comprising the steps of: (S1) supplying air to a burner through a fan; (S2) detecting whether an optimum amount of air is supplied through step (S1) by using the air pressure sensor; (S3) continuously detecting a status of a flame through the flame detection unit if the flame is made by an ignition part; (S4) converting a size of the flame into corresponding voltage value, inputting the voltage value into a microcomputer, and comparing the voltage value with a preset target voltage value; (S5) stopping a combustion process if the microcomputer determines that the air pressure sensor erroneously operates based on a fact that a difference value between the voltage value and the preset target voltage value exceeds a reference value; and (S6) displaying an error message indicating an abnormal combustion state if the microcomputer determines that the air pressure sensor erroneously operates.