773-022

The York Pressure Switch -0.75" WC is a critical safety and air-proving component engineered for residential and commercial gas furnaces. This pressure switch monitors the airflow and negative pressure generated by the inducer motor to ensure the venting system is clear and operating safely. By detecting a specific vacuum of -0.75" WC, it confirms that exhaust gases are being properly expelled before allowing the ignition sequence to proceed. It is a vital replacement part for HVAC systems that fail to ignite or trigger pressure switch error codes. Designed for precision and high-reliability performance, this switch helps maintain the efficiency and safety of your heating equipment by preventing operation during obstructed venting conditions.
Type: Air Pressure Switch
Size: Small
Application: Used in gas-fired furnaces and HVAC heating systems to monitor inducer motor pressure and ensure proper combustion venting.
Specifications: Set point: -0.75" WC (Water Column); Function: Air proving and safety interlocking for furnace ignition.