Genuine Daikin 2239695 Outdoor Magnetic Switch is the contactor-type switch in the outdoor unit that makes and breaks the power feed to a major component on command from the control board. When it fails, the component it feeds may not run, run intermittently, or the outdoor unit may not start. A genuine switch makes and breaks the way your Daikin expects, keeping that feed reliable — where a non-genuine part can stick, chatter, or fail to pull in.