OEM Carrier Integrated Furnace Control Board HK42FZ016 / 325878-751 for Model PG9MAA036060AAKA

This OEM integrated furnace control (IFC) board is the factory-specified replacement for the Carrier PG9MAA036060AAKA single-stage gas furnace. The IFC board is the brain of the heating system — it sequences the inducer motor, hot surface igniter, gas valve, and blower motor in precise timed stages on every call for heat. When the board fails, symptoms range from a complete no-heat lockout and absent LED diagnostic codes to erratic blower operation, ignition attempts with no flame carry-over, or a furnace that powers up but immediately shuts down. Note: OEM part number HK42FZ016 has been superseded by the updated kit 325878-751, which includes adapter wiring harnesses for drop-in compatibility with your existing connector configuration.

• Specs: 24V control circuit | Input range 98–132 VAC @ 60 Hz | Igniter output: 5A @ 120 VAC | Cool blower: 30A, 2 HP, 240 VAC | Heat blower: 5A, 1/2 HP, 240 VAC | Inducer motor: 4A FLA / 8.0A LRA @ 120 VAC | Fixed-speed furnace control | Diagnostic LED fault codes included
• OEM vs Generic: This is a genuine Carrier factory part (or its direct OEM-issued kit successor 325878-751), engineered to factory timing and sequencing tolerances. Aftermarket boards frequently use approximated timing curves that cause nuisance lockouts, premature heat exchanger stress, or warranty-voiding blower delays — none of which apply to this OEM unit.
• Install difficulty: 3/5 — Disconnect power and gas before beginning. The 325878-751 kit ships with wiring adapter harnesses for older-style connector boards. Photograph all existing wiring before removal. Tools needed: 1/4" and 5/16" nut drivers, needle-nose pliers, multimeter. Always transfer the fault-code label to the furnace door panel post-install.
• Warranty: 1-year OEM factory warranty against manufacturing defects. Ships same business day from our NationalHVACParts.com warehouse.

Compatibility: Directly fits Carrier model PG9MAA036060AAKA single-stage gas furnace. OEM part HK42FZ016 is superseded by kit 325878-751 — both are fulfilled by this listing. Verify your existing board's part number against HK42FZ016 or 325878-751 before ordering. Our team is available to confirm fitment prior to purchase — contact us before you order if you have any doubts.