Lennox 73W33 Pressure Switch 318518-761 and CSC-3000 series controllers

and CSC-3000 series controllers

This genuine HVAC pressure switch is cross-compatible with several Carrier

Enhanced Protections: Features an onboard 3-amp fuse and solid-state fan blower control logic to prevent common failures associated with mechanical timers

Engineered for high-performance HVAC gas furnace models

Lennox 73W33 Pressure Switch 318518-761 and CSC-3000 series controllersThe 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