The RBI Boiler 16-0059 Flame Sensor Ignition Module is an essential control component designed for gas-fired boiler systems. It works by detecting the presence of a flame during the ignition process and communicating with the ignition control system to ensure safe burner operation. If a flame is not detected, it helps initiate safety responses to prevent unburned gas accumulation. https://www.partshnc.com/16-0059-rbi-boiler-ignition-module