Image forming apparatus

An image forming apparatus comprising:

• a fixing device configured to fix a toner image on a surface of a sheet by heating of a heater;
• a temperature detector configured to detect an internal temperature of the image forming apparatus;
• and
• processing circuitry configured to:
• switch a continuous print mode that continuously performs a print operation on a plurality of sheets to an intermittent print mode that alternately repeats a print operation on a predetermined number of sheets and a print operation suspension for a predetermined time, when the internal temperature detected by the temperature detector is equal to or higher than a first execution temperature during execution of the continuous print mode;
• cancel the intermittent print mode and switch the intermittent print mode to the continuous print mode, when the internal temperature detected by the temperature detector is equal to or lower than a first cancellation temperature, which is lower than the first execution temperature;
• and
• cause the heater to stop heating the fixing device in the intermittent print mode, when the internal temperature detected by the temperature detector is higher than the first cancellation temperature after a predetermined time has elapsed since a start of execution of the intermittent print mode.