This unit is a direct cross-reference for the 312-25A02 and is a staple for contractors looking to reduce truck stock while maintaining broad compatibility across various burner manufacturers

general-purpose control designed for high-reliability flow detection in hydronic heating and cooling systems

While it offers 5 discrete speed taps for selection during installation

though it is best practice to install the actuator in the upright position to prevent moisture from entering the motor or diaphragm assembly

the internal windings or seat may be compromised

Lennox 11U71 Pressure Switch 322057-301 This unit is a directThe 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.