OEM Carrier Integrated Furnace Control Board HK42FZ040 for Model PG95XAT48100CAAA

This OEM integrated furnace control board (part number HK42FZ040) is the factory-specified replacement for the Carrier PG95XAT48100CAAA 95% AFUE gas furnace. The control board is the central "brain" of your furnace — it orchestrates every operational sequence including inducer start-up, hot surface ignition, gas valve firing, flame sensing, blower motor staging, and continuous safety monitoring. When this board fails, symptoms typically include a complete no-heat lockout, error codes flashing on the board LED, failure to advance through the ignition sequence, or erratic blower behavior that points to no other failed component.

• Part Number: HK42FZ040 | Cross-references: CEPL130948-02, CEBD430948-08A | Factory Authorized Parts (FAP) certified direct OEM replacement
• OEM vs Generic: OEM boards carry factory-programmed timing algorithms, pre-tested fault diagnostics, and exact terminal configurations. Generic aftermarket boards risk mistimed ignition trials, incompatible fault codes, and voided equipment warranties — not recommended for high-efficiency units like the PG95XAT48100CAAA.
• Install Difficulty: 4/5 — Involves 120V line voltage connections. Power must be confirmed off at both the disconnect and breaker before beginning. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, phone/camera to photograph all wiring harness positions prior to removal. Recommend professional installation if unfamiliar with furnace wiring.
• Warranty: 1-year OEM manufacturer defect warranty. Ships same business day from our warehouse in original factory packaging.

Compatibility: Designed for the Carrier PG95XAT48100CAAA 95% AFUE, two-stage, variable-speed gas furnace. Also fits select Bryant and Payne models sharing the HK42FZ040 board specification — verify your unit's data plate and existing board part number before ordering. Not sure if this is the right board? Our HVAC parts specialists verify fitment before you buy — reach out before placing your order.