773-138

Ensure the safe and efficient operation of your heating system with this premium air pressure switch. Designed as a critical safety component for forced-air furnaces, this air proving switch monitors the negative pressure created by the inducer motor to verify proper airflow before allowing the ignition cycle to begin. Calibrated to a precise 0.51" WC (water column) set point, it acts as a safeguard against dangerous conditions such as blocked vents, flue obstructions, or inducer motor failure. This high-reliability sensor is an essential replacement part for resolving furnace startup issues and ensuring your HVAC equipment meets original performance standards for combustion safety.
Type: Air Pressure Switch
Size: Compact
Application: Residential gas furnaces and HVAC heating units requiring combustion air proving and draft pressure monitoring.
Specifications: Pressure Set Point: 0.51" WC; Application: Air Proving; Media: Air