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OEM Carrier Control Board HK42FZ034 for Model GB3AAV024070AGJA
Carrier

OEM Carrier Control Board HK42FZ034 for Model GB3AAV024070AGJA

SKU: carrier-control-board-gb3aav024070agja Brand: Carrier
$189.95

Order before 3PM CST — ships same day.
Standard delivery 2-5 business days. Express options at checkout.

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OEM Carrier Control Board HK42FZ034 for Model GB3AAV024070AGJA

This OEM Carrier control board (HK42FZ034) is the brain of your GB3AAV024070AGJA gas furnace, managing ignition sequencing, blower timing, safety lockouts, and fault diagnostics. When your furnace fails to start, short cycles, or flashes error codes, a faulty board is the most common cause. This factory-original replacement guarantees exact pin layout, relay ratings, and firmware compatibility with the GB3AAV024070AGJA, eliminating the guesswork of universal boards. Installation is moderate—rated for an experienced DIYer or HVAC technician—and typically takes 30 to 45 minutes with basic hand tools; always cut power at the breaker before servicing. Restore reliable heating and built-in self-diagnostics with a genuine Carrier part built to OEM specifications. In stock and ready to ship same-day on all orders placed before 3PM CST, so you can get your system running again fast. Backed by precise fitment for your specific model, this control board is the dependable repair choice for homeowners and pros alike.

Compatibility

This part is compatible with Carrier model GB3AAV024070AGJA.

Shipping

Same-day shipping before 3 PM CST. 30-day returns on uninstalled parts.

Shipping Information

  • Orders placed before 3PM CST ship same business day
  • Standard delivery: 2-5 business days
  • Express shipping available at checkout
  • Free shipping on orders over $75
  • Tracking number emailed upon shipment

Return Policy

  • 30-day returns on unused parts in original packaging
  • Electrical parts (capacitors, contactors, control boards) are final sale once installed
  • Email support@nationalhvacparts.com to initiate a return
  • Refunds processed within 5-7 business days

Frequently Asked Questions

Does this Control Board fit my Carrier Model GB3AAV024070AGJA?
Yes. This is the factory-specified OEM control board for the Carrier Model GB3AAV024070AGJA. It is a direct drop-in replacement that fits without modification. Always verify the model number on your equipment nameplate before ordering.
How do I replace the control board on my Carrier Model GB3AAV024070AGJA?
Difficulty: Advanced (1–2 hrs)
Step 1: Turn off breaker. Step 2: PHOTOGRAPH all wire connections before touching anything. Step 3: Label each wire with tape. Step 4: Disconnect all wires, remove old board. Step 5: Mount new board, reconnect all wires matching your photo exactly. Step 6: Restore power and test all modes. Exact part number match is critical.
My HVAC system is completely dead. What could be wrong?
Completely dead HVAC (no LED on board) = failed control board or blown fuse. Check board fuse first (3A or 5A, costs $1–$5). If fuse is good and board has power but no LED, board is dead. Always photograph wiring before replacing.
Is this control board compatible with Bryant or Payne too?
Many Carrier parts are cross-compatible with Bryant and Payne since all three brands are manufactured by Carrier Global Corporation. The same physical part is often used across brand labels with different model numbers. To verify: check your Bryant or Payne equipment service manual for cross-compatible part numbers, or email info@nationalhvacparts.com with your model number.
Should I use OEM or aftermarket for my Carrier control board?
OEM essential. Control boards are model-specific with precise firmware and connector layouts. Aftermarket boards rarely match all functions and can cause intermittent failures or safety issues. Always match the exact OEM part number.
How fast does National HVAC Parts ship?
Orders placed before 3:00 PM CST ship the same business day. Standard delivery is 2–5 business days anywhere in the continental United States. Express shipping available at checkout. We ship from Houston, TX to all 50 states. 30-day return policy on all parts.
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