The Lochinvar & A.O. Smith 100327204 LWCO Board is an electronic low-water cutoff control board designed for compatible commercial boilers and hydronic heating systems. It monitors the boiler's water level through connected sensing components and controls burner operation to help prevent firing when water levels become unsafe. By providing essential low-water protection, this board he... https://www.partshnc.com/100327204-lochinvar-a-o-smith-lwco-board