Lennox 11U71 Pressure Switch 321894-706 This unit is built with

This unit is built with durable aluminum blades and utilizes a 1/2 inch bore diameter on the discharge side for a secure hub fit

provided it is installed with the appropriate liquid-tight conduit or connectors and gaskets to prevent moisture ingress into the magnetic frame

close on fall refers to the switch making electrical contact as the pressure "falls" further into a negative vacuum (becoming more negative) to reach the set-points of -

This heavy-duty mounting plate ensures the correct alignment of the pilot burner

Technical Precision: Totally enclosed housing protects internal components from debris while ball bearings provide long-term reliability in vertical or horizontal orientations

Lennox 11U71 Pressure Switch 321894-706 This unit is built withThe Lennox 11U71 High Altitude Pressure Switch is a critical safety component designed for furnace pressure switch replacement in systems operating at elevations between 4,500 and 7,500 feet. Calibrated with a precise 0. 85" WC (water column) actuation point, this OEM Lennox part ensures the inducer motor generates sufficient static pressure for safe combustion before allowing the gas valve to energize. This specific 104371 08 model is a SPST N. O.