such as a clogged furnace filter

provided the manifold pressure is calibrated correctly

Broad Compatibility: Functions as a drop-in replacement for HE-67 series sensors

Common Questions How do I adjust the time delay on the RIBD2421C

Can this be converted for use with different gas types

Lochinvar & A.O. Smith 100074640 Ignitor Freon such as a clogged furnaceThe Lochinvar & A. O. Smith 100074640 Ignitor is a critical genuine OEM ignition component engineered for high efficiency condensing water heaters and commercial boiler systems. Built to survive the rigorous thermal cycling of modern hydronic equipment, this black box ignitor assembly provides the high voltage spark necessary for consistent burner ignition and reliable system startup. As a standard replacement for Lochinvar Knight boilers and A. O.