OEM Carrier Integrated Furnace Control Board HK42FZ016 / 325878-751 for Model PG9MAA060080ACKA

This is the factory OEM Integrated Furnace Control (IFC) board for the Carrier PG9MAA060080ACKA gas furnace, supplied under primary part number HK42FZ016 and updated kit number 325878-751. The IFC board is the brain of your furnace — it sequences every stage of operation including inducer pre-purge, hot-surface ignition, gas valve actuation, blower delay timing, and fault code diagnostics. When this board fails, symptoms range from a complete no-heat lockout and flashing LED fault codes, to erratic short-cycling, ignition failure, or a blower that runs continuously and never shuts off.

• OEM Part Numbers: HK42FZ016 (original) | 325878-751 (updated kit with adapter harnesses — direct upgrade path for older HK42FZ series boards including HK42FZ004, HK42FZ007, HK42FZ008, HK42FZ009, and HK42FZ011)
• OEM vs Generic: The factory board includes pre-programmed timing sequences, safety lockout logic, and exact relay/triac ratings matched to the Carrier PG9MAA060080ACKA. Generic aftermarket boards often use generalized firmware that can mask fault conditions or mistime ignition sequences, risking repeated nuisance lockouts or accelerated heat exchanger stress.
• Install Difficulty: 3/5 — Requires shutting off gas and 120V power before service. The 325878-751 kit version ships with wiring adapter harnesses for plug-and-play installation even on older board revisions. Tools needed: ¼" nut driver, needle-nose pliers, phone camera (photograph all wiring before disconnecting). Allow 30–60 minutes. Verify all 24V low-voltage connections are fully seated before restoring power.
• Warranty: 1-year OEM factory warranty. In-stock and ships same business day from our warehouse.

Compatibility: Designed as the factory-specified IFC replacement for Carrier PG9MAA060080ACKA gas furnaces. The 325878-751 kit also supersedes multiple earlier HK42FZ-series board revisions across compatible Carrier, Bryant, and Payne fixed-speed furnace platforms. Confirm your existing board part number against the unit data plate before ordering — our team is available to verify fitment before you buy. Order today and restore heat fast with same-day shipping.