CURRENT CARRYING CONTROL CIRCUIT OF HEATER FOR INTERNAL COMBUSTION ENGINE PARTS

PROBLEM TO BE SOLVED: To provide a current carrying control circuit of a heater for internal combustion engine parts preventing a switching element from being destructed by an output from an AC power generator in accordance with the rotation of an engine even when the engine is operated while a battery is removed therefrom. SOLUTION: The current carrying control circuit of the heater for internal combustion engine parts comprises the AC power generator, a half wave rectification circuit for charging and a circuit for charging battery in which the battery includes the half-wave rectification circuit for charging, a first switching element connected therewith, and a heater connected therewith, and the first switching element carries a current only when signals indicating that the AC power generator rotates in accordance with the rotation of the engine and ambient temperature is below a predetermined temperature are inputted to carry a current into the heater. A first switching element protection circuit outputting a signal for carrying a current into the first switching element when a predetermined voltage less than a withstand voltage of the first switching element is applied is formed.