Carrier HK42FZ036 Control Board 340793-762 contractors should verify the lead

contractors should verify the lead assembly and nameplate rotation diagram before final mounting

If the Aaon P81570 fails to close at 140°F

For contractors performing field replacements

or a "failed to close" error on the furnace control board

Carrier HK42FZ036 Control Board 340793-762 contractors should verify the leadThe Carrier HK42FZ036 Control Board is a critical OEM integrated furnace control designed for high performance management of residential and commercial heating cycles. As the central logic hub, this direct replacement circuit board coordinates the sequence of operation for the inducer motor, hot surface igniter, and blower fan while monitoring essential safety strings. Engineered for compatibility with select Carrier, Bryant, and Payne furnaces,