or a complete lack of airflow while the control board calls for high-voltage output to the motor

heat-resistant construction ensures a secure seal against corrosive flue gases

High Cycle Life: Forged brass body with chrome-plated stem and thermoplastic plug offers superior durability in fluid temperatures ranging from 32°F to 200°F

Optimized Power Conversion: High-grade IGBT module construction minimizes switching losses and heat generation during high-load operations

Optimized 3000 RPM Operation: Provides the correct induction force required for mid-efficiency gas furnaces

Trane SWT3971 Pressure Switch 323080-701 or a complete lack ofThe Trane SWT3971 Pressure Switch is an essential safety component engineered for induction monitoring in high efficiency Trane and American Standard furnaces. This SPST pressure switch (Single Pole Single Throw) is factory calibrated at a 1. 00" W. C. set point to ensure the inducer motor maintains the precise vacuum required for safe combustion and flue gas venting. As a 28VA pilot duty component, the SWT03971 effectively prevents the ignition cycle