OEM Carrier Integrated Furnace Control Board HK42FZ040 for Model PG95XAT66120DAAA

This is the genuine OEM Integrated Furnace Control (IFC) board — part number HK42FZ040 — factory-specified for the Carrier PG95XAT66120DAAA 95% AFUE packaged gas furnace. The control board is the operational brain of your furnace: it sequences the inducer motor, hot surface igniter, gas valve, and PSC blower motor in precise coordination every time a heat call is made. When this board fails, symptoms range from a complete no-heat lockout and random mid-cycle shutdowns to blower-only operation or an igniter that energizes but never opens the gas valve. Fault codes displayed on the board's LED are your first diagnostic clue.

• OEM Part Number: HK42FZ040 | Factory-authorized Carrier replacement | Board part of the CEPL/CEBD series IFC family | Compatible with single-stage hot surface ignition and PSC blower motor configuration
• OEM vs Generic: This is a genuine Carrier factory-authorized board — not an aftermarket clone. OEM boards carry the exact firmware, relay ratings, and safety-switch logic programmed for the PG95XAT66120DAAA. Aftermarket boards may lack model-specific timing sequences, risking nuisance lockouts or voided equipment warranties.
• Install Difficulty: 3/5 — Power down and lock out the furnace at the disconnect before touching any wiring. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, phone/camera to photograph all wiring before removal. Transfer any microchip or memory module from the old board if present. Anti-static precautions (wrist strap or ground yourself on the furnace chassis) are strongly recommended to protect the new board.
• Warranty: 1-year OEM factory warranty against manufacturing defects. Ships same business day from our stocked warehouse — no waiting on special orders.

Compatibility: Designed as the direct OEM replacement for Carrier PG95XAT66120DAAA packaged gas furnaces. Always cross-reference the part number on your existing board's label before ordering to confirm an exact match. Have questions about fitment? Our HVAC parts specialists verify compatibility before you buy — contact us today and get your furnace back online fast.