The Velocity Boiler Works (Crown) 3505076 Control Board is an essential electronic component designed to manage and coordinate the operation of compatible boiler heating systems. It works by receiving input from thermostats and system sensors, then controlling functions such as ignition, burner operation, circulation, and safety monitoring. Commonly used in residential and light comme... https://www.partshnc.com/3505076-velocity-boiler-works-crown-control-board