The Lochinvar & A.O. Smith 100327054 Electronic Control Board is an OEM replacement component designed to support the electronic control and ignition functions of compatible Lochinvar and A.O. Smith HVAC heating equipment, including select boilers and water heating systems. It processes electrical signals to coordinate essential operating functions, helping ensure proper equipment ope... https://www.partshnc.com/100327054-lochinvar-a-o-smith-electronic-control-board