Lennox 73W33 Pressure Switch 318518-761 This genuine HVAC pressure switch

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

but will break the control circuit if sufficient oil pressure isn't established or sustained within the 2-minute release window

Key Benefits: Precision Pressure Regulation: Maintains consistent WC (Water Column) settings under varying inlet pressures

The 120Vac solenoid is protected by a NEMA 4X enclosure

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

Lennox 73W33 Pressure Switch 318518-761 This genuine HVAC pressure switchThe 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