Image Forming Device Capable of Detecting Abnormality in Temperature Sensing Member

An image forming device comprising:

• an image forming unit configured to form an image on a recording sheet;
• a heating body configured to heat the recording sheet on which the image is formed;
• a power supply unit configured to supply power to the heating body in a normal-power output state or a high-power output state;
• a temperature sensing member configured to detect a temperature of the heating body;
• and
• a controller configured to:
• control the power supply unit based on the detected temperature;
• determine whether or not the high-power output state of the power supply unit has continued for a first duration under a print control process;
• and
• judge that the temperature sensing member is in a normal state when determination is made so that the high-power output state has not continued for the first duration and judge that the temperature sensing member is in an abnormal state when determination is made so that the high-power output state has continued for the first duration.