OEM Carrier Integrated Furnace Control Board HK42FZ050 for Model PG96VAT30040AAAA

This is the genuine OEM Integrated Furnace Control (IFC) board, part number HK42FZ050, factory-specified for the Carrier PG96VAT30040AAAA — a high-efficiency, communicating, variable-speed 96% AFUE gas furnace. The IFC board is the brain of the entire furnace operation: it sequences the inducer, controls hot surface ignition, monitors the flame sensor, manages blower motor speed, communicates with the thermostat system, and executes all safety lockout logic. When this board fails, symptoms typically include the furnace entering hard lockout with no heat, random or erratic cycling, failure to advance through the ignition sequence, unresponsive thermostat calls, or a continuously flashing diagnostic LED with no blower response.

• Part Number: HK42FZ050 | OEM Carrier factory-original board | Designed specifically for PG96VAT30040AAAA communicating furnace platform
• OEM vs Generic: This is a true factory OEM board with pre-programmed firmware matching your PG96VAT series. Generic or aftermarket boards risk firmware incompatibility with Carrier's Infinity communicating system, causing fault codes, failed communication, or voided equipment warranties.
• Install Difficulty: 4/5 — This communicating IFC board involves multiple wiring harnesses, ribbon connectors, and system commissioning after installation. Tools needed: #2 Phillips screwdriver, 1/4" and 5/16" nut drivers, multimeter, and a wrist grounding strap to prevent electrostatic discharge. Photograph all wiring connections before removal. Professional installation strongly recommended.
• Warranty: 1-year OEM factory warranty against manufacturing defects. Ships same business day from our climate-controlled warehouse in original factory packaging.

Compatibility: Designed as the exact factory replacement for Carrier model PG96VAT30040AAAA. Verify your unit's full model and serial number against your data plate before ordering. Our HVAC parts specialists are available to confirm fitment before you buy — no guesswork, no returns.