Operational Efficiency: Features a purge lever for manual system flushing and a tight-seating check valve to prevent backflow

If the flame is not detected or is lost

Most failures are secondary to a short circuit in the 24V line

inspect the thermopile output and check for manifold pressure drops

specifically optimized for high-volume airflow across evaporator coils

York S1-026-42198-000 Blower Wheel 340793-762 Operational Efficiency: Features a purgeThe York S1 026 42198 000 Blower Wheel is a precision engineered centrifugal fan component designed for residential air handlers and furnaces. This 10x9 blower wheel features a 10 inch diameter and 9 inch width, specifically optimized for high volume airflow and static pressure management across heat exchangers. Built for clockwise (CW) rotation, it integrates a 1 2 inch bore hub that ensures a concentric fit on standard NEMA blower motor shafts,