Engineered for low-pressure steam heating and industrial process lines

When replacing worn or damaged industrial switch components

It fits a wide range of fan coils and air handlers

Engineered specifically for 40-inch tall Carrier furnaces

Key Benefits Direct OEM Replacement: Replaces legacy part number 62-21002-02 to ensure exact electrical and physical compatibility

Trane SWT3555 Switch 320788-703 Engineered for low-pressure steam heatingThe Trane SWT3555 Switch is a critical low pressure cutout designed for precision monitoring in commercial and residential HVAC systems. Engineered for high reliability compressor protection, this snap action differential pressure switch features a fixed setpoint that triggers an open circuit at 24 PSI and restores the connection at 45 PSI. By acting as a fail safe, the Trane SWT3555 prevents the system from operating under a loss of charge condition