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System Longevity: Protects internal heat exchangers and burners from debris and dirty intake air
provided the pressure drop remains within the valve's operating range
This original equipment manufacturer harness features factory-terminated connectors that ensure a secure
This rating specifies the negative pressure threshold required to close the switch
Lennox 11U64 Pressure Switch 321894-709 System Longevity: Protects internal heatThe 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
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