this unit is optimized for continuous duty in clean

The internal mechanism features a snap-acting SPDT switch

as this unit is configured for CW lead end rotation and requires a 5 MFD / 370V capacitor

direct-fit installation across various packaged units and air handlers

Lennox 63W56 Pressure Switch 318973-401 this unit is optimized forThe Lennox 63W56 Pressure Switch is a dual stage combustion air prover designed for precise draft monitoring in high efficiency gas furnaces. This SPST normally open switch features dual setpoints of 0. 35" WC and 0. 60" WC, facilitating the sequenced operation required for two stage heating cycles. Engineered as a direct OEM replacement part, it ensures the inducer motor maintains proper static pressure before allowing the ignition sequence to