773-139

Ensure the safe and efficient operation of your heating system with this high-quality air pressure switch. Designed as a critical safety mechanism for gas-fired furnaces, this air proving switch monitors the pressure generated by the draft inducer blower to confirm proper venting of combustion gases before the ignition cycle begins. Calibrated to a precise 0.58" WC (Water Column) set point, it prevents the furnace from operating under unsafe venting conditions. Ideal for resolving common 'no-heat' issues, ignition failure, or furnace startup errors, this durable component is essential for maintaining the reliability and safety of your residential HVAC system.
Type: Air Pressure Switch
Size: Small
Application: Gas-fired residential furnaces and HVAC heating systems requiring draft inducer safety monitoring.
Specifications: 0.58" WC (Water Column) trip point, air proving functionality