Trane BRD5770 Board 321894-706 this sensor measures ambient air

this sensor measures ambient air temperature to provide the control board with essential data for defrost cycles

making it the standard choice for reliable sealing performance in light-to-medium pressure applications

Engineered Durability: High-grade alloy construction resists oxidation and terminal degradation over time

Flexible Mounting: A 6-foot capillary allows for remote sensing in ducts

The iO-FAVR-ENH-08 provides essential outdoor temperature and humidity limit options

Trane BRD5770 Board 321894-706 this sensor measures ambient airThe Trane BRD5770 Board is a specialized OEM HVAC control board engineered for high performance regulation in specific Trane and American Standard climate systems. As a veteran grade printed circuit board (PCB), this unit functions as the primary command center, orchestrating the system communication between thermostats, blower motors, and secondary sensors. If you're dealing with erratic fan cycles or a complete system lockout, verifying the