The Rinnai U245-1200-G-HX02 Water Heater PCB 2532WC Compatible MC91 is a replacement printed circuit board designed for compatible Rinnai water heater models. It processes signals from the control system and manages essential functions such as ignition, temperature regulation, safety monitoring, and communication between internal components. Designed for proper fit and compatibility, ... https://www.hnkparts.com/u245-1200-g-hx02-rennai-pcb-2532w-wc-compatible-w-mc91