Patent ID: 7212754

Claim:
An image forming apparatus comprising: an image forming device, including a convey device that conveys a recording medium, a transfer device that transfers a developed image on the recording medium, and a thermal fixing device that performs an image forming operation by contacting the recording medium on which the developed image has been transferred with a heated heating body so as to thermally fix the developed image; a temperature detection device that detects the temperature of the heating body; a first determination device that determines whether or not the temperature of the heating body increases normally based on the temperature detected by the temperature detection device with the image forming operation performed; and a second determination device that determines whether or not the temperature of the heating body increases normally based on the temperature detected by the temperature detection device in a state in which the image forming operation is inhibited from being started with respect to a new recording medium, when it is determined by the first determination device that the temperature of the heating body does not increase normally.