Lennox 78W57 Pressure Switch 322838-753 ensuring optimal outdoor air intake

ensuring optimal outdoor air intake and energy efficiency

ensuring proper pin-to-pin alignment and wire harness integration

This motor’s electrical profile is optimized for compatibility with IEC horizontal and vertical fan coils

it features a TEAO (Totally Enclosed Air Over) enclosure

Common Questions & Technical Support: Why is my Williams vent switch tripping

Lennox 78W57 Pressure Switch 322838-753 ensuring optimal outdoor air intakeThe Lennox 78W57 Pressure Switch is a high precision, factory authorized OEM replacement engineered for draft proving and airflow safety monitoring in Lennox heating and cooling systems. Specifically calibrated to actuate at 0. 27" WC (Water Column), this SPST pressure switch features a 1 4" barb connection for secure integration into existing 24V control circuits. Designed as a direct replacement for Lennox part number 101572 04, it is a critical