The invention provides a refrigerator provided with a damper unit disposed in the duct, which can prevent the damper unit from dewing and baffle from freezing. In order to switch the baffle of the damper unit, a control device (controling the circulation of cold air in switching chamber) controls the damper motor so that the damper motor is energized for self-heating. As the time to energize for self-heating, on precooling, the said motor is energized for self-heating, and during defrosting, the said motor is continually energized, after defrosting, the normal colling is performed and the energization of the damper motor is ended and returns to normal switching action control. On energizing, the energization of A phase coil of damper motor and the energization of B phase coil are alternately switched at regular intervals.