OEM Carrier Integrated Furnace Control Board HK42FZ013 for Model PG8MAA042090AAJA

This OEM integrated furnace control (IFC) board is the factory-specified replacement for the Carrier PG8MAA042090AAJA 80% AFUE gas furnace. The control board is the brain of your furnace — it sequences every stage of operation including inducer startup, hot surface ignition, gas valve activation, and blower motor control. When it fails, you may experience hard lockouts, no-heat conditions, erratic ignition sequencing, continuous blower operation, or fault codes flashing on the LED diagnostic indicator.

• Specs: OEM Part Number HK42FZ013 | 24V control circuit | Compatible with single-stage gas valve operation | Onboard diagnostic LED fault code display | Factory-matched terminal layout for drop-in replacement
• OEM vs Generic: This is a genuine Carrier OEM board, manufactured to exact factory specifications. Generic aftermarket boards often lack precise timing calibration and may not support all diagnostic fault codes, leading to misdiagnosis and callbacks.
• Install Difficulty: 3/5 — Disconnect power and shut off gas before beginning. Tools needed: 1/4" and 5/16" nut drivers, needle-nose pliers, phone or camera to photograph all wiring connections before removal. Label every wire harness prior to disconnecting. Board swap is straightforward but wiring accuracy is critical.
• Warranty: 1-year OEM factory warranty. In stock and ships same business day from our warehouse.

Compatibility: Engineered specifically for the Carrier PG8MAA042090AAJA 80% AFUE single-stage gas furnace. Always verify the OEM part number on your existing board's label before ordering to confirm fitment. Our technical team is available to verify compatibility — contact us before you order if you have any questions.