773-405

This genuine replacement Nordyne air pressure switch is a critical safety component designed for furnace and HVAC heating systems. Functioning as an air proving switch, it monitors the pressure generated by the draft inducer motor to ensure the proper venting of combustion gases. With a precise vacuum set point of -1.5" WC, it prevents the furnace from igniting if a blockage or mechanical failure is detected in the exhaust system. Ideal for troubleshooting furnace ignition failures or pressure switch lockout codes, this high-quality sensor ensures reliable performance and safe operation for residential and mobile home heating units.
Type: Air Pressure Switch
Size: Compact
Application: Used in gas-fired furnaces and HVAC systems to verify correct venting and inducer motor operation before ignition.
Specifications: Pressure Rating: -1.5" WC (Water Column); Function: Air Proving/Vacuum Sensing