773-190

This Armstrong Air 2-Stage Air Pressure Switch is an essential safety and performance component for high-efficiency gas furnaces. Functioning as an air-proving switch, it monitors the pressure generated by the draft inducer motor to ensure the exhaust system is operating correctly before allowing the furnace to ignite. Designed specifically for two-stage heating systems, this dual-level switch ensures the appliance functions safely at both low and high firing rates. Replacing a failing pressure switch can resolve common furnace ignition issues and error codes, restoring reliable heat to your home. This durable component is engineered for precision and long-term reliability in modern HVAC systems.
Type: Air Pressure Switch
Size: Standard
Application: Compatible with high-efficiency two-stage gas furnaces and forced-air heating systems.
Specifications: Dual-stage configuration with 0.45" WC and 1.00" WC setpoints; air-proving safety mechanism.