OEM Carrier Furnace Control Board HK42FZ066 for Model PG96VAT66120DCAA

This is the genuine OEM Carrier Integrated Furnace Control (IFC) board, part number HK42FZ066, factory-specified for the Carrier PG96VAT66120DCAA 96% AFUE two-stage gas furnace. The control board is the central brain of your furnace — it sequences the inducer motor, hot surface igniter, gas valve, and blower, and monitors all safety switches in real time. When this board fails, you may experience a complete no-heat lockout, repeated ignition failures, erratic blower behavior, a furnace that starts then immediately shuts down, or fault codes flashing on the LED diagnostic display with no clear single-component cause.

• OEM Part Number: HK42FZ066 (board ID: CEBD431102-04-RA) | Direct OEM successor: HK42FZ094 | Factory-matched to Carrier PG96VAT66120DCAA specifications
• OEM vs Generic: OEM control boards are programmed with Carrier's exact timing sequences, fault-code logic, and safety thresholds. Aftermarket boards often lack model-specific fault diagnostics and can introduce nuisance lockouts or void remaining equipment warranties.
• Install Difficulty: 3/5 — Requires safely disconnecting 120V and 24V wiring harnesses, photographing all connector positions before removal, and transferring wiring one-to-one to the new board. Tools needed: flat-head and Phillips screwdrivers, 1/4" nut driver, multimeter, smartphone for wiring photos. Always shut off the gas and disconnect power at the breaker before servicing.
• Warranty: 1-year OEM manufacturer's warranty. Ships same business day from our warehouse when ordered before 3 PM local time.

Compatibility: Engineered for the Carrier PG96VAT66120DCAA 96% two-stage gas furnace. Note that HK42FZ066 was discontinued by Carrier in August 2020; the factory-authorized current equivalent is HK42FZ094, which is a drop-in replacement. Verify your existing board's part number on the board label before ordering. Questions about fitment? Our HVAC parts specialists confirm compatibility before every order — call or chat today. In stock — ships today.