773-006

The York Air Pressure Switch (0.40" WC) is a critical safety component designed for gas-fired furnaces and HVAC systems. As an essential air proving switch, it monitors the negative pressure generated by the inducer motor to ensure that combustion gases are being properly vented through the flue. This switch acts as a safety gate, preventing the furnace from igniting if it detects insufficient airflow or a blocked vent. If your heating system is experiencing ignition failure or intermittent shut-offs, replacing a faulty pressure switch is a common solution to restore reliable operation. This high-quality replacement part is calibrated for precise sensitivity, ensuring your equipment operates within manufacturer safety parameters.
Type: Air Pressure Switch
Size: Standard
Application: Used in residential and light commercial gas furnaces and HVAC units to monitor exhaust draft and ensure safe ignition.
Specifications: Pressure Setting: 0.40" WC (Water Column); Function: Air Proving/Safety Cut-off