OEM Carrier Integrated Furnace Control Board HK42FZ016 for Model PG8DAA036070ABJA

This OEM Integrated Furnace Control (IFC) board is the factory-specified replacement for the Carrier PG8DAA036070ABJA gas furnace. The control board is the brain of your heating system — it sequences the inducer motor, hot surface igniter, gas valve, and blower motor in precise order on every call for heat. When this board fails, symptoms include a complete no-heat lockout, furnace short-cycling, erratic blower behavior, fault LED flash codes, or the system failing to progress past the inducer pre-purge stage. This part is cross-referenced under both OEM part numbers: HK42FZ016 (original) and 325878-751 (current superseding kit with wiring adapter harnesses).

• Specs: 24VAC control circuit | Input range: 98–132 VAC @ 60 Hz | Ignitor output: 5A @ 120 VAC | Cool blower: 30A, 2 HP, 240 VAC | Heat blower: 5A, 1/2 HP, 240 VAC | Inducer: 4A FLA / 8.0 LRA @ 120 VAC | Microprocessor-based with diagnostic LED fault codes
• OEM vs Generic: OEM boards carry factory-programmed timing sequences, brownout protection, and reverse polarity safeguards matched to Carrier's exact specifications. Generic aftermarket boards may use wider component tolerances, which can cause nuisance lockouts or premature failure of downstream components like the gas valve and igniter.
• Install difficulty: 3/5 — Disconnect power and gas before starting. Photograph all wiring harness connections before removal. The 325878-751 kit includes adapter harnesses for older-style boards with legacy connectors. Tools needed: 1/4" nut driver, needle-nose pliers, phone camera for wiring reference. Always clear fault codes after installation.
• Warranty: 1-year OEM factory warranty against manufacturing defects. Ships same business day from our warehouse.

Compatibility: Designed for Carrier model PG8DAA036070ABJA packaged gas furnace. Also fits related Carrier, Bryant, and Payne single-stage fixed-speed furnace models referencing HK42FZ004, HK42FZ007, HK42FZ008, HK42FZ009, HK42FZ011, HK42FZ013, or 325878-751. Verify your existing board's part number on the board label before ordering. Have a question about fitment? Our HVAC-certified team confirms compatibility before you buy — ships today.