Engineered as a wrap-around heating element

this sequencer provides exact fit compatibility for models including the AMMK and AEB series

this green color-coded component ensures consistent performance in high-amperage applications

depending on the differential pressure

Lochinvar & A.O. Smith 100074220 Flame Rod 328140-751 Engineered as a wrap-around heatingThe Lochinvar & A. O. Smith 100074220 Flame Rod is a critical OEM replacement part designed for formal flame rectification within high efficiency commercial and residential water heaters. As an authentic sensor assembly, it monitors the DC micro amp signal produced during combustion to ensure the burner remains lit. If your system is experiencing "Ignition Failure" lockouts or rough operation, a fouled or degraded flame sensor is the primary culprit.