OEM Carrier Integrated Furnace Control Board (IFC) HK42FZ016 / 325878-751 for Model PG8UAA048135AAJA

This is the OEM Carrier Integrated Furnace Control (IFC) board, factory part numbers HK42FZ016 and superseding kit 325878-751, designed as the direct replacement for the Carrier PG8UAA048135AAJA single-stage gas furnace. 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 cycle. When it fails, symptoms include a furnace that won't light, a system stuck in lockout after one ignition attempt, erratic blower behavior, or a unit that simply goes completely dead with no response to the thermostat.

• OEM Part Numbers: HK42FZ016 (original) | 325878-751 (current superseding kit — includes wiring adapter harnesses for plug-and-play installation on older boards) | Also cross-references: CEPL130438-01, CEBD430438-09A, 1012-940
• Electrical 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 | Gas valve: 24 VAC | Includes diagnostic LED fault-code display
• OEM vs Generic: This OEM board is factory-programmed with Carrier's exact ignition timing, blower delay profiles, and lockout logic for the PG8UAA048135AAJA. Generic aftermarket boards (ICM282A/B series) use approximated firmware and broader tolerances — acceptable for emergency repairs, but OEM is the only choice for restoring factory-certified performance and preserving equipment warranty.
• Install Difficulty: 3/5 — Shut off power at the disconnect and gas at the shutoff valve before starting. The 325878-751 kit ships with adapter harnesses if your existing wiring doesn't match the updated connector layout. Photograph all wiring connections before removal. Tools needed: 1/4" nut driver, needle-nose pliers, phone or camera for wiring documentation. Allow 30–45 minutes. A fault code label is included and must be affixed inside the furnace cabinet.
• Warranty: 1-year OEM manufacturer warranty against defects. Ships same business day from our warehouse when ordered before 3 PM local time.

Compatibility: Engineered for the Carrier PG8UAA048135AAJA fixed-speed single-stage gas furnace. The 325878-751 kit also covers Bryant and Payne models sharing the HK42FZ-series board family. Verify your existing board's part number on the label before ordering — our team is available to confirm fitment before you buy. Order now and get your furnace back online — in stock and ships today.