Lennox 11U64 Pressure Switch 321894-709 as the factory-molded straight boots

as the factory-molded straight boots provide the necessary seal against moisture and debris

The Supco ignitor kit includes essential components required for quick replacement

This rating specifies the negative pressure threshold required to close the switch

Designed specifically for International Comfort Products systems

provided the pressure drop remains within the valve's operating range

Lennox 11U64 Pressure Switch 321894-709 as the factory-molded straight bootsThe Lennox 11U64 Pressure Switch (Cat # 11U64, Part # 104371 01) is a precision calibrated OEM furnace replacement part engineered for high performance draft verification. This 0. 65" WC SPST pressure switch is the direct substitute for the legacy 93W86 model, designed to monitor inducer motor performance and confirm proper airflow before the ignition sequence initiates. Built with brass terminals, fine silver contacts, and a stainless steel