or the burner fails to ignite despite having gas supply pressure and a proper spark/hot surface ignition sequence

While designed for pneumatic controls and fan parts

This discharge air temperature sensor is specifically calibrated for a range of 80-130 degrees F

The EPDM seal material is capable of handling temperatures from -30°C up to 140°C

the thermocouple is likely failing to generate the 30mV threshold required to hold the valve open

Trane BRD4785 Circuit Board 326010-701 or the burner fails toThe Trane BRD4785 (also identified as the UC210 Printed Circuit Board) is a critical OEM replacement component designed for high level communication and control within Trane HVAC systems. As a veteran grade HVAC control board, the Trane BRD04785 facilitates precise electrical connections and logic processing to maintain optimal system efficiency. This specific UC210 controller is frequently utilized in commercial and high end residential applications