OEM Carrier Integrated Furnace Control Board HK42FZ081 for Model PG80VTLA66110CAA

This is the OEM Carrier Integrated Furnace Control Board (IFC), part number HK42FZ081, factory-specified for the Carrier PG80VTLA66110CAA 80% AFUE gas furnace. The IFC board is the brain of your furnace — it sequences every critical operation including inducer startup, hot surface ignition, gas valve firing, blower motor staging, and all safety-circuit monitoring. When it fails, the symptoms range from a hard no-heat lockout and flashing fault codes, to erratic blower behavior, ignition that never completes, or a furnace that trips the safety limit and shuts down within seconds of starting. Replacing the control board with the correct OEM part restores factory-programmed timing, safety thresholds, and diagnostic LED flash codes.

• Part Number & Specs: OEM Part # HK42FZ081 | Carrier Integrated Furnace Control (IFC) | 24V control circuit | Factory Authorized Parts — Replacement Components Division, Carrier Corporation | Board dimensions approx. 7" L × 8" W
• OEM vs Generic: OEM boards carry exact factory-programmed ignition trial timing, blower off-delay profiles, and fault-code sequences matched to your PG80VTLA66110CAA. Aftermarket boards often use generic timing tables that can shorten equipment life or mask underlying fault conditions.
• Install Difficulty: 3/5 — Disconnect power and gas before beginning. Tools needed: 1/4" and 5/16" nut drivers, needle-nose pliers, phone or camera to photograph all wiring harness connections prior to removal. Transfer the model plug from the old board to the new one — the model plug is not included. Recommend verifying all 24V safety circuits (pressure switch, limit switch, flame sensor) before power-up.
• Warranty: 1-year OEM factory warranty against manufacturing defects. Ships same business day from our warehouse in original manufacturer packaging.

Compatibility: Designed as the direct OEM replacement control board for the Carrier PG80VTLA66110CAA 80% AFUE packaged gas furnace. Note: HK42FZ081 has been superseded by Carrier part HK42FZ094 — if the original HK42FZ081 is unavailable, HK42FZ094 is the factory-authorized direct drop-in replacement. Always verify your unit's data plate and wiring diagram before ordering. Questions about fitment? Our HVAC parts specialists confirm compatibility before you buy — in stock and ready to ship today.