OEM Carrier Integrated Furnace Control Board HK42FZ016 for Model PG9MAA048100ABKA

This is the factory OEM integrated furnace control board (IFC) for the Carrier PG9MAA048100ABKA gas furnace, supplied under part numbers HK42FZ016 and kit number 325878-751. The IFC is the brain of your furnace — it sequences the inducer motor, hot surface igniter, gas valve, and blower in precise order on every call for heat. When it fails, symptoms typically include a hard lockout with no ignition attempt, erratic blower behavior, fault codes on the LED diagnostic display, or a furnace that runs briefly then shuts down and won't restart. Before replacing the board, always verify 24V at the transformer secondary and rule out tripped pressure switches or a faulty flame sensor — these are far more common root causes.

• OEM Part Numbers: HK42FZ016 (Integrated Furnace Control Board) | 325878-751 (Integrated Furnace Control Board Kit — includes wiring adapter harnesses for legacy board swaps)
• OEM vs Generic: This is a genuine Carrier factory board with exact firmware, relay ratings, and terminal layout. Third-party aftermarket boards may use substitute relay contacts rated below OEM spec, leading to premature failure or nuisance lockouts. OEM is always the recommended choice for warranty and long-term reliability.
• Install difficulty: 3/5 — Power down and lock out the furnace at the disconnect and breaker before starting. Photograph all wiring harness connections before removal. Tools needed: #2 Phillips screwdriver, 1/4" and 5/16" nut drivers, needle-nose pliers, smartphone for wiring photos. If installing the kit version (325878-751), use the included adapter harnesses — do not force original connectors onto new board terminals.
• Warranty: 1-year OEM factory warranty. Ships same business day from our warehouse when ordered before 3:00 PM local time.

Compatibility: Verified direct fit for Carrier model PG9MAA048100ABKA. The 325878-751 kit variant also supersedes earlier HK42FZ-series boards (HK42FZ004, HK42FZ007, HK42FZ008, HK42FZ009, HK42FZ011) on compatible platforms — confirm your existing board's part number on the label before ordering. Questions about fitment? Our HVAC parts team verifies compatibility before you buy. Order now — in stock and ships today.