Lennox 10U93 Pressure Switch 321702-401 Refer to the included defrost

Refer to the included defrost control wiring diagram or technical sheet to match the "curve" to your unit's specific requirements

Rely on this OEM-spec ambient filter to maintain the ISO air quality standards your facility demands without the "fluff" of inferior aftermarket alternatives

as this unit is built without external knobs to prevent unauthorized tampering

As a genuine OEM Lennox replacement

the unit is shipped with a complete mounting kit

Lennox 10U93 Pressure Switch 321702-401 Refer to the included defrostThe Lennox 10U93 Pressure Switch is a critical OEM safety component designed for precise airflow monitoring in Lennox, Armstrong, and Ducane furnace systems. This . 65" WC SPST pressure switch functions by validating that the inducer motor is creating sufficient draft to safely vent combustion gases before allowing the ignition sequence to proceed. As a Single Pole Single Throw (SPST) normally open switch, it provides a reliable electrical signal to