773-140

This premium furnace air pressure switch is a vital safety mechanism for residential heating systems. Specifically calibrated to a 0.47" WC (Water Column) set point, this air proving switch monitors the draft inducer motor's performance to ensure proper venting before the ignition cycle begins. If your HVAC system is cycling off prematurely or failing to ignite due to pressure detection errors, this replacement component is designed to restore reliable furnace operation. Engineered for precision and long-term durability, it acts as a critical fail-safe, preventing the burner from firing if dangerous venting conditions are detected. It is an essential part for maintaining the safety and efficiency of gas-fired forced-air furnaces.
Type: Air Pressure Switch
Size: Small
Application: Used in gas-fired furnaces and residential HVAC systems to monitor combustion airflow and ensure safe venting conditions.
Specifications: 0.47" WC (Water Column) trip point, air proving functionality, safety limit control.