The Rinnai PC Board, Combi Middle (805000157) is an authentic OEM replacement control board for i-Series Plus combination boilers. In combination boiler systems, multiple boards work together to manage the full range of heating and domestic hot water functions. The middle board handles specific control logic and inter-board communication within the boiler's electronic system. Replace when diagnostic fault codes or system behavior indicates a control board malfunction.
- Genuine OEM Rinnai replacement control board
- Compatible with Rinnai i-Series Plus combination boilers
- Manages specific combination boiler control functions
- Works in coordination with the main and other control boards
- Resolves control-related errors and inter-board communication faults