and 50BJ series units

it maintains precise timing for pre-purge and ignition trials

Standardized HTS Code: Classified under HTS 8415

Does it support manual override

verify the MPN 100110703 against your manufacturer's parts list before installation

Lennox 20J97 Pressure Switch 326070-701 and 50BJ series unitsThe Lennox 20J97 Pressure Switch is a mission critical safety component engineered for high efficiency HVAC units requiring precise draft proving. This OEM Lennox replacement part features a 1. 15" WC set point and a Single Pole Single Throw (SPST) configuration, ensuring the combustion air inducer is generating the necessary static pressure before allowing the ignition sequence to proceed. Designed with a standard 1 4" barb connection, it integrates