OEM Carrier Integrated Furnace Control Board HK42FZ081 for Model PG80VTLA48070BAA

This OEM Integrated Furnace Control (IFC) board is the factory-specified replacement for the Carrier PG80VTLA48070BAA 80% AFUE gas furnace. The control board is the central nervous system of your furnace — it sequences every operation from thermostat call to burner ignition, blower ramp-up, fault monitoring, and safe shutdown. When it fails, symptoms include a complete no-heat lockout, erratic blower behavior, ignition faults that won't reset, or a furnace that powers on but never fires the burners. Fault codes on the board's LED will often point directly to the IFC as the root cause after other components have been ruled out.

• OEM Part Number: HK42FZ081 (superseded by HK42FZ094) | Factory Authorized Carrier replacement | Genuine OEM — not an aftermarket clone
• Key Functions: Manages hot surface ignition sequence | Controls induced draft blower and variable-speed circulator | Monitors pressure switches, limit switches, and flame sensor | Provides LED diagnostic fault codes for field troubleshooting
• OEM vs Generic: OEM boards carry factory-matched firmware and timing parameters calibrated specifically for the PG80VTLA series. Generic or aftermarket IFC boards risk mistimed ignition trials, blower delays out of spec, and voided equipment warranties — a risk not worth taking on a safety-critical component.
• Install Difficulty: 4/5 — This is an intermediate-to-advanced repair. Tools needed: #2 Phillips screwdriver, 1/4" nut driver, needle-nose pliers, multimeter, phone/camera to photograph all wiring harness connections before removal. Always disconnect power at the breaker and verify 0V before touching the board. Transfer the model plug from your existing board if required.
• Warranty: 1-year OEM manufacturer warranty. Ships same business day from our warehouse when ordered before 3 PM local time.

Compatibility: Direct OEM replacement for Carrier PG80VTLA48070BAA 80% AFUE upflow/horizontal gas furnaces. Note: HK42FZ081 has been superseded by HK42FZ094 — both part numbers are fulfilled with the current production board, which is a certified drop-in replacement. Verify your existing board's part number on the label before ordering. Questions about fitment? Our HVAC-certified parts team confirms compatibility before your order ships — no guesswork.