the 100110039 is the official engineering update and direct substitute for the legacy 9004714115 part number

Built to withstand demanding HVACR environments

suitable for HVAC and light chemical processing

Excessive vent lengths beyond the manufacturer’s specification can also cause nuisance tripping

Trane SWT3926 Pressure Switch 328140-751 the 100110039 is the officialThe Trane SWT3926 Pressure Switch is an essential OEM safety component designed for precise condensate management in American Standard and Trane air handlers and furnaces. As a 24V furnace pressure switch, it monitors for restricted drainage or secondary heat exchanger blockages, preventing potential water damage and system failure. This SPST condensate switch is a direct drop in replacement for part number D345669P01, ensuring high reliability