inspect the thermopile output and check for manifold pressure drops

If the flame is not detected or is lost

This button is specifically sized for compatibility with 01 and 05 series diaphragm-actuated valves

specifically optimized for high-volume airflow across evaporator coils

This actuator is designed for standard IEC and Erie PopTop series valve bodies

York S1-026-42198-000 Blower Wheel 340793-762 inspect the thermopile output andThe 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,