773-064

Ensure the safe and efficient operation of your heating system with this premium 2-stage air pressure switch. Designed as an essential air proving safety device, this switch monitors the vacuum pressure generated by the furnace's inducer motor to verify proper airflow and venting before ignition. Specially engineered for dual-stage gas furnaces, it features dual set points of -0.90" WC and -1.50" WC to manage both low-fire and high-fire heating cycles. Replacing a faulty pressure switch is a common fix for furnace startup issues, ignition failures, and pressure-related fault codes, helping to maintain home comfort and system reliability.
Type: Air Pressure Switch
Size: Compact
Application: High-efficiency 2-stage gas furnaces and HVAC heating systems
Specifications: Dual-stage pressure sensing; Low-stage set point: -0.90" WC; High-stage set point: -1.50" WC; Air proving safety function.