Patent ID: 8909083

Claim:
An image forming apparatus comprising: a fixing device including a heating roller heated by a fixing heater and a fixing roller brought into pressure contact with the heating roller, the fixing device fixing a toner image to a recording medium by the heating roller and the fixing roller; a DUTY storage portion configured to store a first DUTY table in which DUTY values are set in plural stages, and a second DUTY table in which DUTY values less than corresponding DUTY values in the first DUTY table by a predetermined value, respectively, are set in plural stages; a heater control portion configured to control the energization of the fixing heater, and, when a total consumption current supplied from a commercial power supply exceeds a setting current, to reduce a consumption current of the fixing heater by controlling the energization of the fixing heater based on the first DUTY table stored in the DUTY storage portion; a number-of-times counting portion configured to count the number of times the total consumption current has exceeded the setting current; a number-of-times determining portion configured to determine whether the number of times of excess counted by the number-of-times counting portion exceeds a setting number of times; and a modifying portion configured to cause the heater control portion to control the energization of the fixing heater based on the second DUTY table stored in the DUTY storage portion when the number-of-times determining portion determines that the number of times of excess exceeds the setting number of times, wherein when the number of times of excess exceeds the setting number of times, the modifying portion causes the heater control portion to control the energization of the fixing heater for a setting time by specifying a DUTY value in the second DUTY table, which value corresponds to a currently-used DUTY value in the first DUTY table, and by employing a DUTY value in the second DUTY table, which value is less than the specified DUTY value in the second DUTY table.