001-157

Ensure your heating system operates safely and efficiently with this premium low-fire air pressure switch. As a critical safety component in high-efficiency gas furnaces, this air proving switch monitors the pressure generated by the draft inducer motor to verify proper combustion airflow before allowing the ignition process to begin. Designed specifically for the low-fire stage of multi-stage heating units, it prevents the furnace from operating under unsafe venting conditions. If your furnace is experiencing ignition failure, frequent cycling, or system lockout error codes related to pressure sensing, this 1.35" WC switch is the ideal replacement to restore reliable performance and home comfort during the heating season.
Type: Air Pressure Switch
Size: Standard
Application: Commonly used in high-efficiency gas furnaces and multi-stage residential heating systems to monitor combustion chamber pressure and verify inducer motor operation.
Specifications: Pressure Setting: 1.35" WC (Water Column); Function: Low Fire Air Proving; Sensor Type: Diaphragm-actuated safety switch