773-148

This professional-grade air pressure switch is a vital safety component for modern gas furnaces and HVAC systems. Designed as an air proving switch, it monitors the negative pressure generated by the draft inducer motor to ensure the exhaust venting system is clear and functioning safely. Operating at a precise set point of -1.10" WC, this switch prevents the furnace from igniting if it detects hazardous conditions such as a blocked flue or a failing inducer fan. If your heating system is failing to ignite or cycling incorrectly due to airflow issues, this high-performance pressure switch is an essential replacement part to restore reliable operation and maintain home safety.
Type: Air Pressure Switch
Size: Compact
Application: Gas-fired residential furnaces, HVAC heating units, and draft inducer motor assemblies.
Specifications: Pressure Rating: -1.10" WC (Water Column); Function: Air Proving Safety Monitor; Sensor Type: Diaphragm-actuated