Because this is a variable speed HVAC motor

providing a robust solution for economy-tier residential or light commercial retrofits

allowing for precise adaptation to existing ductwork or wall orientations

ensuring the secondary 24V output remains stable for relays and contactors

Once the sensed temperature rises to the reset threshold of 50°F

Lennox 10J73 Pressure Switch 323613-751 Because this is a variableThe Lennox 10J73 Pressure Switch (Catalog Number 10J73, Model 103827 01) is a critical safety component designed for furnace applications to ensure the inducer motor is moving combustion air effectively. As a single pole, normally open switch, it is calibrated to a fixed set point of 0. 25 PF (inches water column), making it a precise replacement for the combustion air prover in Lennox G21, G24, G27, G28, G30, and G37 series furnaces. This HVAC