The Resideo Q3400A1024 Igniter Flame Rod Assembly is an essential component for SmartValve systems in HVAC equipment. It serves two functions: as an igniter to start the gas pilot flame and as a flame rod to certify the presence of the flame, confirming the system's safe operation. https://www.partshnc.com/q3400a1024-resideo-hsi-pilotburnrq3450-3620-3480