The Trane SWT03179 Pressure Switch is a safety and control component designed to monitor pressure conditions within compatible HVAC equipment. It operates by responding to pressure changes and opening or closing its electrical contacts when the specified pressure threshold is reached, helping protect equipment and maintain safe operation. Commonly used in compatible Trane furnaces and... https://www.partshnc.com/trane-swt03179-pressure-switch-0-80-psig-spdt-n