When your Girard 2GWH-8 tankless water heater stops igniting, loses temperature control, or shows erratic behavior, the micro-processor control board is the most common root cause. This is the genuine Girard OEM replacement board -- part number 2022107561, vendor cross-reference 11-9188 -- designed as a direct drop-in to restore full electronic control function without cutting, splicing, or adapter harnesses.
The Girard 2GWH-8 is a propane-fired, on-demand tankless water heater built for RV use. Its micro-processor control board is the central hub of the system -- it reads sensor inputs (flow, temperature, flame detection), drives the ignition sequence, modulates the gas valve, and communicates fault codes to the user interface. When this board fails, the unit typically either will not ignite at all, shuts down mid-cycle, or displays persistent error codes that cannot be cleared by resetting.
Part 2022107561 is the OEM board produced to Girard's original specifications. It connects to the existing wiring harness with factory connectors, mounts to the original standoffs, and requires no firmware configuration on installation. If your 2GWH-8 unit carried this board from the factory, this part replaces it directly.
Factory connectors and mounting pattern match the original board -- no harness modifications needed.
Manages ignition sequencing, flow sensing, temperature regulation, and fault code output.
Produced to OEM specs under the Lippert / Girard brand. Not an aftermarket clone.
No programming, calibration, or firmware updates required after installation.
This board is specifically designed for the Girard 2GWH-8 RV tankless water heater. Confirm your unit model number on the data plate inside the heater access door before ordering. Girard produced several 2GWH variants (2GWH-D, 2GWH-RV, etc.) -- while some share components, control boards are not universally interchangeable across all variants without verification.
Control boards are a common misdiagnosis target. Before replacing the board, verify: LP tank has adequate pressure, the inline fuse is intact, the water flow switch is functioning, all wiring harness connections are seated and corrosion-free, and the thermistor/temperature sensors test within spec. Replacing a good board does not fix problems caused by failed sensors or wiring faults.