It will automatically close the circuit once the water temperature drops to the 170°F reset point

Does this unit include the blower motor and housing

ensuring a direct drop-in replacement for existing Parker-Watts R643-Series configurations

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

If the flame is not detected or is lost

York S1-026-42198-000 Blower Wheel 340793-762 It will automatically close theThe 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,