Lennox 10J73 Pressure Switch 320788-703 this specific assembly (100112345) is

this specific assembly (100112345) is hard-indexed with a #39 orifice designed exclusively for natural gas water heaters

Can I use a universal pressure switch to replace this Lennox part

such as a failing blower motor or a restricted return air filter

it provides the precise airflow required for optimal heat rejection across the condenser coils

High-Torque Performance: Delivers stable 460V 3-phase power for consistent motor performance across the entire frequency range

Lennox 10J73 Pressure Switch 320788-703 this specific assembly (100112345) isThe 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