White-Rodgers 21V51U-843 HSI Kit 30067439-890 as long as your system

as long as your system is configured to read a standard 10k ohm Type II NTC thermistor curve

It is designed for single rod flame sensing or remote sensing and provides a high-voltage spark for reliable burner ignition

Key Benefits Optimized Ignition Performance: The 20KV output ensures a hot

25" WC to prevent ignition if the venting system or inducer motor is underperforming

and heat exchanger integrity are verified alongside the installation of this high-limit safety switch to ensure reliable operation in demanding residential or light commercial applications

White-Rodgers 21V51U-843 HSI Kit 30067439-890 as long as your systemThe White Rodgers 21V51U 843 is a professional grade Universal 2 Stage Integrated Furnace Control Kit designed for high efficiency systems utilizing a variable speed ECM blower motor. This comprehensive HSI ignition control solution replaces over 40 existing White Rodgers models, including the 50V51 XXX and 50V61 XXX series. It features a 16 pin interface for precise ECM motor control and includes a 120V nitride ignitor to upgrade older 80V silicon