121-293

This premium Air Pressure Switch, also known as an air proving switch or air shield, is a vital safety component for residential and commercial heating systems. Designed to monitor the airflow within your furnace or HVAC unit, this switch ensures that the inducer motor is creating the necessary draft before allowing the ignition process to begin. By verifying proper ventilation and exhaust, it prevents the buildup of dangerous gases and ensures efficient combustion. If your heating system is failing to ignite, short-cycling, or displaying a pressure switch lockout error, this high-precision sensor is the ideal replacement part to restore safe and reliable operation to your furnace.
Type: Air Pressure Switch
Size: Small
Application: Commonly used in forced-air furnaces, boilers, and high-efficiency heating systems to verify inducer fan performance and flue venting safety.
Specifications: Pressure-sensitive diaphragm mechanism; electrical terminal connections for seamless integration; designed to detect specific vacuum or pressure thresholds for system safety interlocks.