or a failing indoor blower motor that is not moving enough air across the heat exchanger

System Protection: Critical for preventing bypass air and water leaks from entering the furnace heat exchanger or ductwork

Apply the rated vacuum while checking continuity across the terminals

This SPNO pressure switch (Single Pole Normally Open) is engineered to close on a fall in pressure

Direct Cross-Reference: Serves as the official replacement for legacy part number 3L09-15 and ICP HH12ZA260

York S1-026-19654-703 Wheel Els PW 17895 or a failing indoor blowerThe York S1 026 19654 703 is a precision engineered centrifugal blower wheel designed for high efficiency airflow within York and Johnson Controls air handling units. For technicians addressing vibration or reduced CFM, this 10 inch diameter by 8 inch width wheel serves as the direct OEM replacement to restore system static pressure. Constructed from heavy duty galvanized steel, it features a 1 2 inch bore hub designed for secure attachment to