The Mitsubishi Electric E2222B452 Electronic Control Board is a replacement control component designed for compatible Mitsubishi Electric HVAC systems. It processes signals from sensors and connected components to coordinate functions such as temperature regulation, fan operation, and system cycling. Commonly used in ductless mini-split air conditioners, heat pumps, and related indoor... https://www.partshnc.com/mitsubishi-electric-e2222b452-electronic-control-board