In cooling mode

this board-mounted switch provides precise temperature sensing within the airflow

Quiet Performance: Engineered blade geometry reduces turbulent air noise during high-demand cooling cycles

It serves as the authorized successor to legacy part numbers 11112201

Single Throw) configuration essentially serving as a thermal fuse link

Williams P623513 Control Board 322838-753 In cooling modeField proven and reliable, the Williams P623513 Control Board serves as the central logic unit for high efficiency Williams furnace systems. As an essential OEM furnace replacement part, this integrated furnace control board (IFC) manages the complex sequence of operations required for safe and effective combustion. It precisely regulates the inducer motor, directs the ignition control timing for the hot surface igniter, and manages the blower motor