Lennox 73W33 Pressure Switch 320735-701 This bypasses the standard timing

This bypasses the standard timing and accelerates the internal clock

OEM Compatibility: Precision-manufactured to match Conbraco 20-series gauge specifications

as long as the voltage and frame size match

the dryer tripping on high-pressure limits

Manual Override: Includes a manual lever for simplified system setup and troubleshooting

Lennox 73W33 Pressure Switch 320735-701 This bypasses the standard timingThe Lennox 73W33 is a high precision dual stage pressure switch engineered for specific Lennox furnace models and air handlers. This OEM replacement pressure switch serves as a critical safety component, monitoring the pressure differential within the combustion blower. With setpoints calibrated at . 68 . 35 WC, it ensures proper venting and blower performance before allowing the ignition sequence to proceed. As a two stage pressure switch, it manages