The Trane SWT3245 SPST Pressure Switch is a reliable safety control component designed to monitor air or gas pressure in HVAC systems. It works by opening or closing a single-pole single-throw (SPST) electrical circuit when the required pressure level is reached, ensuring safe and proper equipment operation. Commonly used in furnaces, air handlers, and other compatible heating and ven... https://www.partshnc.com/94wc-spst-pressure-switch-5