OEM Carrier Integrated Furnace Control Board HK42FZ031 for Model PG9UAA042060AASA

This is the OEM factory-replacement integrated furnace control (IFC) board for the Carrier PG9UAA042060AASA gas furnace. The control board is the brain of your furnace — it sequences every stage of operation including inducer start, igniter warm-up, gas valve open, flame sensing, and blower ramp-up. When this board fails, symptoms include hard lockout with no ignition attempt, erratic blower behavior, fault codes that won't clear, or a furnace that simply does nothing when the thermostat calls for heat.

• Specs: OEM Part Number HK42FZ031 | Integrated Furnace Control (IFC) | 120V input | 24V control circuit output | Compatible with single-stage gas valve and HSI ignition system | Includes diagnostic LED fault code display
• OEM vs Generic: This is a genuine Carrier OEM board, manufactured to exact factory tolerances with pre-loaded firmware. Aftermarket boards may lack proper fault timing calibration, leading to nuisance lockouts or reduced component life — especially on igniter and gas valve sequencing.
• Install Difficulty: 3/5 — Requires disconnecting 120V supply power before any work begins. Tools needed: 1/4" and 5/16" nut drivers, needle-nose pliers, smartphone (photograph ALL harness connections before removal). Transfer wiring harness plug-by-plug. Restore power and verify ignition sequence on first call for heat.
• Warranty: 1-year OEM factory warranty against defects. Ships same business day from our stocked warehouse when ordered before 3 PM local time.

Compatibility: Directly replaces the factory control board in the Carrier PG9UAA042060AASA gas furnace (042 = 3.5-ton nominal, 060 = 60,000 BTU/hr input). Always confirm the part number printed on your existing board's label before ordering to ensure an exact match. Our fitment specialists are available to verify compatibility before you purchase — no guesswork required.