OEM Carrier Integrated Furnace Control Board HK42FZ050 for Model PG96VAT60100CAAA

The HK42FZ050 is the factory OEM integrated furnace control (IFC) board for the Carrier PG96VAT60100CAAA 96% AFUE variable-speed gas furnace. This board is the central brain of the system — it sequences every heating and cooling operation, including the two-stage gas valve, hot surface igniter, variable-speed ECM blower motor, inducer motor, and communicating thermostat interface. When it fails, common symptoms include a hard lockout with blinking fault codes, the furnace failing to ignite or immediately shutting down, erratic blower behavior, or a completely unresponsive system with no call for heat.

• Specs: OEM Part# HK42FZ050 | Designed for 96% AFUE two-stage variable-speed furnaces | 24 VAC control circuit | Compatible with communicating and conventional thermostat wiring | Diagnostic LED fault code display
• OEM vs Generic: This is the genuine factory-original Carrier board — not an aftermarket substitute. OEM boards preserve exact ignition timing, blower ramp profiles, and safety lockout logic programmed for the PG96VAT60100CAAA. Generic boards may omit variable-speed ECM communication protocols, risking improper blower speed staging and voided equipment warranties.
• Install difficulty: 4/5 — Variable-speed communicating furnace boards require careful wire mapping and ECM motor connector sequencing. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter, phone/camera to photograph all wiring before removal. Recommend professional installation to preserve manufacturer warranty.
• Warranty: 1-year OEM factory warranty against manufacturing defects. Ships same business day from our warehouse in original manufacturer packaging.

Compatibility: Engineered specifically for the Carrier PG96VAT60100CAAA packaged 96% AFUE variable-speed two-stage gas furnace. Verify your unit's OEM part number on the data plate or existing board before ordering. Not sure it fits? Our HVAC parts specialists confirm fitment before you check out — orders placed by 3 PM ship the same day.