Genuine Daikin 2008396 Fan Motor Capacitor is the 6 µF, 440 V run capacitor that sets the phase shift for the outdoor fan motor so it starts cleanly and turns at full speed. When it fails the fan struggles to start, runs slow or stalls, and the unit can trip on high head pressure as airflow over the coil drops away. Because a weak fan capacitor often sits alongside a tired fan motor, pricing the two together saves a return — and the genuine 6 µF/440 V part matches the motor's designed phase angle where a generic substitute can leave it running hot.