OEM Carrier Integrated Furnace Control Board HK42FZ050 for Model PG8JVA066135AAJA

This OEM integrated furnace control board (IFC) is the factory-specified replacement for the Carrier PG8JVA066135AAJA gas furnace. The control board is the central brain of your furnace — it sequences every stage of operation including inducer startup, ignition timing, gas valve activation, blower motor staging, and all safety lockout responses. When this board fails, symptoms typically include a complete no-heat condition, repeated ignition lockouts, erratic blower behavior, unresponsive thermostat calls, or a furnace that starts briefly and then shuts down with a fault code.

• Part Number: HK42FZ050 | OEM Carrier Integrated Furnace Control Board | Factory-matched firmware and timing sequences for the PG8JVA series
• OEM vs Generic: This is a genuine OEM Carrier board — not an aftermarket substitute. OEM boards preserve exact ignition trial timing, blower delay profiles, and safety lockout thresholds. Aftermarket boards may deviate from factory specs, causing nuisance lockouts or voiding equipment warranties.
• Install Difficulty: 3/5 — Requires disconnecting and reconnecting multiple wiring harnesses at precise terminals. Before removing the old board, photograph all wire connections from multiple angles. Tools needed: 1/4" and 5/16" nut drivers, needle-nose pliers, a multimeter for voltage verification. Always shut off power and gas before servicing. Electrostatic discharge precautions are strongly recommended.
• Warranty: 1-year OEM factory warranty against manufacturing defects. Ships same business day from our climate-controlled warehouse when ordered by 3 PM local time.

Compatibility: Designed as the factory-direct replacement for Carrier model PG8JVA066135AAJA. Always verify your existing board's part number against HK42FZ050 before ordering. Not sure? Our HVAC parts specialists confirm fitment before you buy — call or chat with us today. In stock and ready to ship now.