The Rinnai 104000229 Water Heater Power Control Board Kit manages electrical operations and coordinates the operation of connected water heater components. This replacement kit includes the electronic board and related parts designed to regulate power distribution and process signals from the appliance's operating systems. It receives input from sensors and other electrical components... https://www.hnkparts.com/104000229-rennai-kit-pcb-rl94i-vc/4-104000229.html