Self-Draining Design: The 3/4 inch angle steam trap body prevents water holdup

failure to close the pressure switch

and MA-409 legacy units

The kit provides a complete cartridge assembly with dual O-rings

For veteran contractors managing York chiller maintenance

Trane SFSWT03533 Auxiliary Switch 320074-702 Self-Draining Design: The 3/4 inchThe Trane SFSWT03533 Auxiliary Switch is a critical SPDT auxiliary switch designed for HVAC 20 60 Amp contactors. As the direct field replacement for the SWT3533, this genuine OEM part provides a single pole, double throw configuration featuring one normally open (NO) and one normally closed (NC) contact. Built for rugged industrial and commercial applications, it integrates seamlessly into Trane air conditioners, furnaces, and heat pumps to drive