773-386

This high-performance dual air pressure switch is a critical safety component designed for modern HVAC and furnace systems. Engineered to monitor differential pressure within the heating system, this air proving switch ensures that the inducer blower is operating at the correct speed and that the venting system is clear of obstructions before the ignition process begins. If the pressure falls outside the calibrated range of 0.40" WC and -0.90" WC, the switch will prevent the unit from firing, protecting your equipment from potential damage and ensuring home safety. Whether you are troubleshooting a furnace that won't ignite or replacing a faulty sensor, this durable dual-stage pressure switch provides the reliable performance needed to maintain optimal airflow and heating efficiency.
Type: Air Pressure Switch
Size: Small
Application: Commonly used in residential forced-air furnaces, HVAC units, and heating systems to provide air proving safety checks during the start-up sequence.
Specifications: Dual pressure set points: 0.40" WC / -0.90" WC; monitors differential pressure for inducer motor operation.