Genuine Daikin 4009007 Capacitor is the compressor run capacitor that supplies the phase shift a single-phase compressor motor needs to pull into rotation and stay running under load. When it loses capacitance the compressor labours to start, stalls, or trips the overload while drawing heavy locked-rotor current. As the compressor's contactor and run capacitor are usually changed in the same visit, doing both genuine keeps the repair tidy — and a Daikin capacitor holds its rated value where a generic that drifts low leaves the compressor straining every start.