Always verify the part number on the existing board to ensure terminal alignment

so utilizing a high-quality filter-regulator upstream is recommended

or the furnace short-cycling during the transition between heating stages

Set your multimeter to the DC microamp (µA) scale and connect it in series between the sensor terminal and the control board lead

For contractors replacing a S1-324-36086-389 variable speed motor

Heil Quaker ICP 1184783 Control Board 322057-301 Always verify the part numberThe Heil Quaker ICP 1184783 Control Board serves as a direct fit OEM integrated furnace control (IFC) for specific Heil, Tempstar, Comfortmaker, and ICP gas furnaces. This circuit board manages critical sequence operations, including the inducer motor, hot surface ignition (HSI), and blower timing, ensuring precise combustion cycles and safety monitoring. As a veteran preferred replacement, the 1184783 furnace control is designed to address common