OEM Carrier Integrated Furnace Control Board HK42FZ016 for Model PG8UAA066111ACJA

This is the factory OEM integrated furnace control (IFC) board for the Carrier PG8UAA066111ACJA gas furnace, sold under primary OEM part number HK42FZ016 and updated kit number 325878-751. The IFC board is the brain of your furnace — it sequences the inducer motor, hot surface igniter, gas valve, and blower motor through every heating and cooling call. When it fails, symptoms range from complete no-heat lockout and erratic blower operation to ignition attempts that abort mid-cycle. A diagnostic LED on the board flashes fault codes to pinpoint the failure before you replace any part.

• Specs: Input voltage: 98–132 VAC at 60 Hz | Igniter output: 5A at 120 VAC | Cool blower: 30A, 2 HP, 240 VAC | Heat blower: 5A, 1/2 HP, 240 VAC | Inducer motor: 4A, 120 VAC | Compatible with 24 VAC standard thermostat | Microprocessor-based fixed-speed control
• OEM vs Generic: This is the genuine Carrier OEM board — not an ICM282 or third-party clone. OEM boards carry factory-calibrated ignition timing and blower delay profiles matched to the PG8UAA066111ACJA's heat exchanger. Generic boards often use wider component tolerances and may not replicate proprietary fault-code behavior, risking nuisance lockouts or undetected safety faults.
• Install difficulty: 3/5 — Photograph all wiring harnesses before disconnecting. Discharge any static before handling the board (ESD-sensitive). The 325878-751 kit includes adapter harnesses for units originally fitted with the older covered-style board. Tools needed: 1/4" and 5/16" nut drivers, needle-nose pliers, multimeter for 24V circuit verification. Always cycle power off at the breaker before starting.
• Warranty: 1-year OEM manufacturer warranty against defects. In-stock and ships same business day from our NationalHVACParts.com warehouse.

Compatibility: Factory-specified replacement for Carrier model PG8UAA066111ACJA single-stage gas furnace. Also cross-references Bryant and Payne units using the HK42FZ series board. Confirm your existing board's part number against HK42FZ016 or 325878-751 before ordering — if your board carries a different HK42FZ suffix, contact our team for fitment verification. Questions? Our HVAC techs confirm fitment before you buy.