The Heatco HMPSE-Y35 Flame Rod is a reliable flame sensing component designed to ensure safe burner operation in compatible HVAC heating equipment. It works by detecting the presence of a burner flame through flame rectification and sending a signal to the ignition control board to confirm proper ignition. If no flame is detected, the system shuts off the gas supply for added safety. ... https://www.partshnc.com/hmpse-y35-heatco-flame-rod