OEM Carrier Integrated Furnace Control Board HK42FZ016 for Model PG8UAA024045ABJA

This OEM Integrated Furnace Control (IFC) board is the factory-specified replacement for the Carrier PG8UAA024045ABJA gas furnace. As the brain of the heating system, the control board sequences every stage of operation — inducer startup, hot surface ignition, gas valve activation, blower motor staging, and safety lockout logic. When it fails, symptoms range from a complete no-heat condition and repeated ignition lockouts, to erratic blower behavior or a furnace that starts then immediately shuts down. The diagnostic LED on this board flashes fault codes to help pinpoint the failure quickly.

• OEM Part Numbers: HK42FZ016 (original) | 325878-751 (OEM successor kit with adapter harnesses) — both are factory-authorized for Carrier PG8UAA024045ABJA.
• Electrical Specs: Input range 98–132 VAC at 60 Hz | Ignitor output: 5A at 120 VAC | Cool Blower: 30A, 2 HP, 240 VAC | Heat blower: 5A, 1/2 HP, 240 VAC | Inducer Motor: 4A at 120 VAC | Compatible with 24 VAC standard thermostat | Includes reverse polarity protection and secondary brownout voltage protection.
• OEM vs Generic: Genuine Carrier OEM boards carry factory-programmed ignition timing and safety lockout sequences tuned specifically for this furnace. Aftermarket boards often use generic microprocessor firmware that can cause nuisance lockouts, incorrect blower delay timing, and voided equipment warranties.
• Install Difficulty: 3/5 — Discharge all capacitors and shut off power and gas before beginning. Tools needed: 1/4" and 5/16" nut drivers, needle-nose pliers, multimeter, phone/camera for wiring documentation. Photograph all terminal connections before disconnecting. If upgrading from HK42FZ016 to the 325878-751 kit, adapter harnesses are included for plug-and-play fitment. Always consult the furnace wiring diagram on the inside panel door.
• Warranty: 1-year OEM manufacturer warranty. Ships same business day from our warehouse when ordered before cutoff.

Compatibility: Designed for the Carrier PG8UAA024045ABJA single-stage gas furnace. Also compatible across the broader Carrier, Bryant, and Payne HK42FZ-series platform. Verify your existing part number against your furnace's control panel label before ordering — our team is available to confirm fitment prior to purchase. Order now and ships today.