Image forming apparatus

An image forming apparatus, comprising:

• a fixing device configured to thermally fix, through use of a heating member, an unfixed image formed on a recording sheet;
• a non-contact temperature sensor configured to commence measuring temperature of the heating member once a waiting period of a certain length has passed after power supply commences to the fixing device;
• an acquiring unit configured to each time the fixing device transitions to a non-power supplied state, acquire information indicating a heating condition of the heating member at the time the fixing device transitions to the non-power supplied state;
• and
• a fixing control unit configured to perform a non-waiting period control once the waiting period has passed and a waiting period control during the waiting period,
• the non-waiting period control being controlling to increase temperature of the heating member, while monitoring temperature of the heating member using the non-contact temperature sensor, until a target temperature is reached at which thermal fixing can be performed, and
• the waiting period control being estimating temperature of the heating member at a present time using most recent information acquired by the acquiring unit, and
• when the estimated temperature does not exceed a threshold temperature, controlling to increase temperature of the heating member, and
• when the estimated temperature exceeds the threshold temperature, controlling to prevent increase of temperature of the heating member.