OEM Carrier Integrated Furnace Control Board HK42FZ016 for Model PG8DAA048115ACJA

This OEM integrated furnace control (IFC) board is the factory-specified replacement for the Carrier PG8DAA048115ACJA gas furnace. The IFC board is the brain of your heating system — it sequences the inducer motor, hot surface igniter, gas valve, and blower through every heating and cooling cycle. When the board fails, symptoms include furnace lockout with no ignition attempt, erratic blower behavior, a furnace that starts then shuts down immediately, or a completely dead system with no response to the thermostat call for heat. A flashing diagnostic LED on the board itself can point directly to the failed function before you even remove the panel.

• OEM Part Numbers: HK42FZ016 (original IFC board) | 325878-751 (OEM successor kit with adapter harnesses — direct factory upgrade). Both part numbers are covered by this listing.
• Specs: Input voltage: 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 FLA / 8.0 LRA at 120 VAC | Compatible with 24 VAC standard thermostat | Microprocessor-based with diagnostic LED fault codes
• OEM vs Generic: OEM boards carry factory firmware with exact ignition timing, blower delay profiles, and safety lockout logic calibrated for the PG8DAA048115ACJA. Aftermarket boards may use generic timing tables that can cause nuisance lockouts, shorten heat exchanger life, or void your equipment warranty.
• Install difficulty: 3/5 — Discharge stored power and switch off the furnace disconnect before touching the board. Photograph all wiring harness connections before removal. The 325878-751 kit version includes adapter harnesses for legacy connectors. Tools needed: #2 Phillips screwdriver, 1/4" nut driver, needle-nose pliers, phone camera for wire documentation. If your furnace shows a fault code before replacement, record it — it confirms the board as the root cause.
• Warranty: 1-year OEM factory warranty. In stock — ships same business day from our warehouse.

Compatibility: Designed for the Carrier PG8DAA048115ACJA gas furnace. Also fits compatible Carrier, Bryant, and Payne single-stage fixed-speed furnace models using the HK42FZ series IFC board. Verify your existing part number on the board label or unit data plate before ordering. Our team is available to confirm fitment — contact us before you order if unsure.