Carrier HK35AC003 CEBD430444-03A Furnace Control Printed Circuit Board

Carrier HK35AC003 CEBD430444-03A Furnace Control Printed Circuit Board is an OEM replacement main control board for Carrier heating equipment, designed for 24 VAC operation. The part numbers HK35AC003 and CEBD430444-03A appear in Carrier catalogs and aftermarket listings to identify this PCB as the central electronics module for compatible furnaces. As the furnace's control hub, the board orchestrates system startup, operation sequencing, and safety interlocks by processing signals from the thermostat and communicating with other control components, all within the Carrier control architecture. Marketed as an OEM Carrier component, it is positioned as a replacement part for units originally equipped with this exact control board, helping to restore proper furnace function while preserving the intended electrical interfaces. The 24 VAC power requirement aligns with common residential heating control systems, enabling standard low‑voltage wiring and compatibility with typical thermostat configurations and relays that govern the furnace’s response to demand.