Lennox 10J73 Pressure Switch 320788-703 such as a failing blower

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

If your valve body is intact but experiencing internal leaks or mechanical sticking

this component ensures reliable switching of the compressor and fan motor circuits

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

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

Lennox 10J73 Pressure Switch 320788-703 such as a failing blowerThe 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