and 4) and certain HE II boiler applications

The "Low Water" LED should blink

This manual reset (M/R) control features an 8

the degree F scale plate

Designed for reliable building automation system (BAS) integration

Lennox 11U64 Pressure Switch 319852-301 and 4) and certain HEThe 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