OEM Carrier Integrated Furnace Control Board HK42FZ016 for Model PG8UAA024065ACJA

This is the factory OEM Integrated Furnace Control (IFC) board for the Carrier PG8UAA024065ACJA packaged gas/electric unit. Supplied under OEM part number HK42FZ016 (also referenced as kit part 325878-751), this board is the central nervous system of your furnace — orchestrating the ignition sequence, gas valve timing, inducer and blower motor operation, pressure switch monitoring, and all safety lockout logic. When this board fails, symptoms range from a complete no-heat condition and repeated ignition lockout to erratic blower behavior, constant fault codes, or a furnace that starts briefly then shuts down unexpectedly.

• Specs: OEM Carrier Integrated Furnace Control Board | Part Numbers: HK42FZ016 / 325878-751 | 120VAC input | 24VAC control circuit | Compatible with single-stage gas valve and HSI igniter configuration | Factory-programmed timing and lockout logic
• OEM vs Generic: This is a genuine Carrier OEM board with factory-calibrated ignition timing, blower off-delays, and fault code sequences. Aftermarket boards often ship with generic default timing profiles that can cause nuisance lockouts, reduce heat exchanger life, or void equipment warranties.
• Install Difficulty: 3/5 — Requires disconnecting 120VAC power and discharging any residual voltage before removal. Tools needed: 1/4" and 5/16" nut drivers, needle-nose pliers, phone or camera to photograph all wiring harness positions before disconnection. Label every connector. A multimeter is recommended to verify 24VAC control circuit integrity after installation.
• Warranty: 1-year OEM factory warranty against defects. Orders placed before cutoff ship same business day from our stocked warehouse.

Compatibility: Designed and factory-matched for the Carrier PG8UAA024065ACJA packaged gas/electric unit. Cross-reference your existing board's part number (HK42FZ016 or 325878-751) against your unit's data plate before ordering. Not sure it fits? Our HVAC parts specialists verify fitment before you buy — reach out before placing your order and we'll confirm compatibility fast.