PURPOSE: A multi heater system is provided to reduce manufacturing costs using a simple structure. CONSTITUTION: A plurality of heater parts includes a heater body part, a heater line, and a temperature sensor. A heater information display part(22) is installed on a housing(21). The heater information display part displays low rank heater part information with respect to the heater part. The low rank heater part information includes current temperatures of each heater part and heater operation state data. A sensor electric quantity detection part detects electric quantities of each temperature sensor. An information channel display part(23) displays an information channel. A controller displays a malfunction state of the temperature sensor on the heater information display part.
