The NAVIEN 30013044C PCB Board is a replacement printed circuit board designed for NHB Series gas boilers. It serves as the boiler’s central control component, managing electrical signals and coordinating key operating functions such as ignition, heating cycles, safety controls, and system communication. This PCB board helps ensure accurate operation of connected components and suppor... https://www.partshnc.com/30013044c-navien-tankless-water-heaters-pcb-board-nhb