you will require the 4074EYK assembly instead

the 8101111407 is an HGP (High Gas Pressure) model designed to trip on a rise in pressure

It also fits certain Blue Angel series burners

Key Benefits Precise Pressure Calibration: Engineered to match specific OEM thresholds

making it a standard choice for HVACR contractors managing large-scale thermal processing applications

Lochinvar & A.O. Smith 100170652 Sensor Kit 30067439-890 you will require the 4074EYKThe Lochinvar & A. O. Smith 100170652 Sensor Kit is a critical OEM replacement part engineered for precise flue gas temperature monitoring in Knight boiler systems and high efficiency water heaters. This flue temp sensor kit (cross referenced as TST3403) serves as a vital safety component, providing real time thermal reporting to the integrated control board. By continuously tracking exhaust discharge temperatures, the 100170652 flue sensor prevents