Trane SWT2973 Pressure Switch 318172-701 extending the operational life of

extending the operational life of the packing and stem

High-Temperature Durability: Rated for the intense thermal cycles common in gas-fired unit heaters

This 2-wire configuration significantly reduces cabling requirements and commissioning time compared to traditional 3-wire sensors

and Corsaire AC and Heat Pump units

Quiet Operation: Balanced impeller wheel reduces vibration and resonance through the vent piping

Trane SWT2973 Pressure Switch 318172-701 extending the operational life ofThe Trane SWT2973 Pressure Switch is an essential OEM safety component designed for precise draft monitoring in Trane and American Standard gas furnaces. Engineered for a 24V control circuit, this high performance sensor ensures the inducer motor establishes a proper vacuum before allowing the ignition sequence to proceed. It features a critical setpoint configuration, precisely calibrated to open at 1. 33" WC and close at 1. 52" WC, preventing unsafe