OEM Carrier Furnace Control Board HK42FZ066 for Model PG96VAT30040ABAA

This is the genuine OEM integrated furnace control (IFC) board, part number HK42FZ066, factory-specified for the Carrier PG96VAT30040ABAA 96% AFUE two-stage gas furnace. The control board is the nerve center of your furnace — it sequences every operational stage including inducer startup, hot surface ignition, gas valve actuation, blower timing, and fault code diagnostics. When the IFC board fails, symptoms range from hard lockout with flashing fault codes, to a furnace that starts but shuts down immediately, to a system that shows no response at all at the thermostat call for heat.

• Part Specs: OEM Part Number HK42FZ066 (superseded by HK42FZ094) | 24V control circuit | Compatible with two-stage gas valve and variable-speed blower configurations | Integrated LED fault code diagnostics
• OEM vs Generic: This is a genuine Carrier Factory Authorized Part engineered to exact PG96VAT30040ABAA specifications. Aftermarket boards frequently use off-tolerance components that cause nuisance lockouts, incorrect blower delays, and shortened system life — OEM is the only safe choice for a high-efficiency two-stage furnace.
• Install Difficulty: 3/5 — Requires disconnecting 120V line power and 24V control wiring harnesses. Tools needed: #2 Phillips screwdriver, 1/4" nut driver, needle-nose pliers, multimeter. Always photograph all wiring harness connections before removal. Consult the PG96VAT30040ABAA service manual for fault code diagnostics prior to replacement to confirm the board is the root cause.
• Warranty: 1-year OEM manufacturer warranty. Ships same business day from our warehouse when ordered by 3 PM local time.

Compatibility: Designed for the Carrier PG96VAT30040ABAA 96% AFUE two-stage gas furnace. Note: HK42FZ066 has been superseded by OEM replacement board HK42FZ094 — both part numbers are covered by this listing and the replacement board ships as the current production equivalent. Verify your unit's model and serial number on the data plate before ordering. Our fitment team is available to confirm compatibility before you buy.