It fits a wide range of fan coils and air handlers

Engineered specifically for 40-inch tall Carrier furnaces

When replacing worn or damaged industrial switch components

this assembly maintains the integrity of the original equipment's manifold pressure and flame rectification signals

This unit is a direct OEM replacement motor for several Lochinvar and A

Trane SWT3555 Switch 320788-703 It fits a wide rangeThe 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