Lennox 73W33 Pressure Switch 318518-761 but will break the control

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

Engineered for high-performance HVAC gas furnace models

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

Common Installation Questions Is this electrode compatible with high-voltage ignition modules

Lennox 73W33 Pressure Switch 318518-761 but will break the controlThe 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