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OEM Carrier Control Board FK4BNF004000AAAA for Model FK4BNF004000AAAA
Carrier

OEM Carrier Control Board FK4BNF004000AAAA for Model FK4BNF004000AAAA

SKU: carrier-control-board-fk4bnf004000aaaa Brand: Carrier
$287.95

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 FK4BNF004000AAAA for Model FK4BNF004000AAAA

This OEM Carrier control board is the genuine replacement for the FK4BNF004000AAAA fan coil unit, serving as the electronic brain that manages blower operation, fan speed control, safety circuits, and thermostat communication. A failing board commonly causes a non-functioning blower, intermittent operation, or a fully dead system—this factory part restores precise, reliable control. Built to Carrier's original specifications for the FK4BNF004000AAAA, it offers an exact electrical and physical match, sparing you the fit and reliability issues that come with generic boards. Installation difficulty is moderate and recommended for a qualified HVAC technician: power is disconnected, every wire harness and connector is labeled and transferred, the new board is mounted, and operation is confirmed. Most replacements take 30 to 60 minutes with standard tools. Each board is brand-new and never refurbished, carrying Carrier's trusted build quality. We stock this part and ship same-day on all orders placed before 3PM CST. Order from NationalHVACParts.com for a guaranteed OEM fit and long-lasting, dependable performance.

Compatibility

This part is compatible with Carrier model FK4BNF004000AAAA.

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 FK4BNF004000AAAA?
Yes. This is the factory-specified OEM control board for the Carrier Model FK4BNF004000AAAA. 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 FK4BNF004000AAAA?
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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