OEM Carrier Integrated Furnace Control Board HK42FZ016 for Model GB1AAV036111ADJA

This OEM integrated furnace control board (IFC) is the factory-specified replacement for the Carrier GB1AAV036111ADJA gas furnace. The control board is the brain of your heating system — it sequences the inducer motor, hot surface igniter, gas valve, and blower fan in precise timing to ensure safe, reliable ignition and heat delivery. When this board fails, symptoms include the furnace entering hard lockout after repeated ignition attempts, erratic blower behavior, failure to call for heat despite a valid thermostat signal, or diagnostic LED fault codes indicating board-level errors. Also sold as kit part number 325878-751, which includes the board and mounting hardware.

• Specs: OEM Part Numbers: HK42FZ016 / Kit: 325878-751 | Integrated Furnace Control (IFC) | 24V control circuit | Compatible with single-stage gas valve and hot surface ignition systems | Factory-matched timing and lockout logic for Carrier GB1AAV036111ADJA
• OEM vs Generic: This is a genuine OEM Carrier control board with factory-programmed ignition timing, blower delay profiles, and fault diagnostics. Aftermarket boards often use generalized timing curves that can cause nuisance lockouts, premature heat exchanger stress, or voided equipment warranties — OEM is the only safe choice for a control board replacement.
• Install difficulty: 3/5 — Requires comfort with low-voltage wiring and terminal identification. Tools needed: Phillips and flathead screwdrivers, needle-nose pliers, smartphone (photograph all wiring before disconnecting). Turn off power at the disconnect and gas supply before beginning. Transfer wiring harness connector by connector; do not rush terminal reassignment.
• Warranty: 1-year OEM factory warranty against defects. Orders placed before 3PM ship same business day from our stocked warehouse.

Compatibility: Designed for the Carrier GB1AAV036111ADJA gas furnace. Verify your existing board's part number against HK42FZ016 or 325878-751 before ordering. If your data plate or existing board label matches either OEM part number, this is your direct replacement. Not sure? Our HVAC parts specialists confirm fitment before you buy — reach out via chat or phone.