773-005

This premium Intertherm Dual Pressure Switch is a critical safety component designed for forced-air furnace systems. As a high-performance air proving switch, it monitors the pressure generated by the draft inducer motor to ensure proper venting and airflow before allowing the heating cycle to proceed. A failing pressure switch can lead to furnace ignition failure or intermittent shut-offs, making this an essential replacement part for restoring reliable heating performance. Engineered for precision, it features two distinct set points—0.70" WC and 0.20" WC—to accurately detect atmospheric pressure changes within the combustion chamber. This dual-stage switch is a common solution for HVAC troubleshooting in mobile home furnaces and modular heating units, providing peace of mind through enhanced system safety and efficiency.
Type: Air Pressure Switch
Size: Compact
Application: Commonly used in residential forced-air furnaces, specifically mobile home and manufactured housing HVAC systems, to monitor draft inducer motor performance and flue venting.
Specifications: Dual-stage pressure sensing; Trip points at 0.70" WC (Water Column) and 0.20" WC; Designed for air proving and safety limit circuits; Compatible with standard vacuum hose connections.