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Ships within 48 hours · Estimated delivery Oct 27 - Nov 1
This board fits an extensive list of Carrier units
This varies by the boiler's BTU rating
For technicians performing HVAC control board replacement
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 This board fits an extensiveThe 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
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