Lennox 11U71 Pressure Switch 320788-702 this is a 'Less Plug'

this is a 'Less Plug' model

it can function with any system requiring a standard flame rod or spark igniter that matches its mechanical specifications and thermal rating

1KW heater assembly is built to OEM specifications for York units

Cast metal gears provide higher shear strength and greater resistance to heat-related warping

which protects against thermal shock and ensures immediate heat transfer availability

Lennox 11U71 Pressure Switch 320788-702 this is a 'Less Plug'The 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.