FUEL CELL SYSTEM AND AIR BLEEDING METHOD THEREOF

A fuel cell system including a radiator disposed on an electronic part cooling line, the cooling line configured to pass through an electronic part and to circulate a coolant, the radiator being configured to cool the coolant, a coolant pump configured to pump the coolant to circulate the coolant in electronic part cooling line, and a controller configured to determine whether air bubbles are generated, based on a change in a current of the coolant pump while the coolant is circulating and control an air bleeding through the coolant pump.