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Carrier

OEM Carrier Control Board HK42FZ034 for Model GB3AAV036095ACJA

SKU: carrier-control-board-gb3aav036095acja Brand: Carrier
$149.95

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 GB3AAV036095ACJA

This OEM Carrier furnace control board (HK42FZ034) is the brain of your Carrier GB3AAV036095ACJA gas furnace, managing the ignition sequence, blower timing, safety interlocks, and limit switch monitoring. It coordinates the igniter, gas valve, inducer, and blower motor to deliver safe, efficient heating. Common failure symptoms include a furnace that won't start, blower that runs constantly, flashing diagnostic LED fault codes, or intermittent no-heat conditions. This direct-fit replacement is programmed to the original specification for the GB3AAV036095ACJA, ensuring correct timings and connector pinouts for a reliable swap. Installation is moderate and takes 30–45 minutes: photograph the wiring, kill power at the breaker, transfer connectors one at a time to the new board, and remount on the standoffs. Matching the connectors carefully prevents miswiring. Restore dependable operation and clear nuisance fault codes with a genuine Carrier board. In stock and ships same-day when you order before 3PM CST.

Compatibility

This part is compatible with Carrier model GB3AAV036095ACJA.

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 GB3AAV036095ACJA?
Yes. This is the factory-specified OEM control board for the Carrier Model GB3AAV036095ACJA. 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 GB3AAV036095ACJA?
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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