Genuine Daikin 4006005 Outdoor Fan Motor spins the condenser fan that drives air over the outdoor coil, the step that lets your system dump the heat it has collected. A motor on its way out often shows itself first as a fan that hesitates to start, turns more slowly than it used to, or falls silent while the compressor keeps running. Fitting the genuine motor keeps the airflow matched to what the unit was engineered around, so heat rejection stays where it should rather than drifting off with a substitute.