The Rinnai 105000210 Water Heater PC Board manages the electronic controls of compatible Rinnai water heaters. It receives signals from the control system and regulates the heater’s operating settings during use. This replacement board is designed for proper connection and installation in compatible models. It is suitable for replacing a damaged or unresponsive PC board and restores n... https://www.hnkparts.com/105000210-rennai-pc-board-kcm