773-011

This Carrier 0.33" WC air pressure switch is a vital safety component designed for high-efficiency gas furnaces and HVAC systems. Functioning as an air proving switch, it monitors the pressure differential created by the inducer blower motor to ensure that combustion gases are being properly vented before allowing the ignition sequence to proceed. If your furnace is failing to light or is displaying pressure switch-related error codes, this replacement switch is essential for restoring safe and reliable heating. It is factory-calibrated to a precise 0.33-inch water column set point, ensuring your appliance operates within optimal manufacturer specifications. Durable and responsive, this switch helps prevent hazardous conditions by ensuring the venting system is clear and the inducer motor is functioning correctly.
Type: Air Pressure Switch
Size: Small
Application: Used in residential gas furnaces and HVAC units to monitor inducer motor airflow and ensure safe combustion venting.
Specifications: Pressure Setting: 0.33" WC (Water Column); Function: Normally Open/Air Proving