Trane SFSWT03533 Auxiliary Switch 320788-704 It addresses common failure points

It addresses common failure points such as bellows assembly fatigue and internal scale buildup that can impede precise temperature regulation

Multi-Fuel Versatility: Certified for use with liquefied petroleum gases and natural gas

Ensure each sensor on the daisy chain has a unique address to avoid communication conflicts

Common Questions Is the GRD10A-600 compatible with wireless thermostats

Trane SFSWT03533 Auxiliary Switch 320788-704 It addresses common failure pointsThe 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