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Carrier

OEM Carrier Control Board for Fan Coil Model FC4BNB042020AAAA

SKU: carrier-control-board-fc4bnb042020aaaa Brand: Carrier
$249.95

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 for Fan Coil Model FC4BNB042020AAAA

This genuine OEM Carrier control board is the brain of your FC4BNB042020AAAA fan coil unit, coordinating blower operation, fan speed transitions, and built-in safety sequencing. If your air handler won't power the blower, short cycles, or stops responding to thermostat calls, a failed control board is a likely culprit, and a fresh OEM board restores factory-spec reliability. Designed specifically for the FC4BNB042020AAAA, it matches the original terminal layout and connector harness for a direct, plug-in installation with no rewiring. The replacement is moderate difficulty and usually takes a qualified technician 30 to 45 minutes: disconnect power, transfer wiring one terminal at a time to avoid mistakes, and seat the new board securely. Using an authentic Carrier component maintains correct voltage handling, accurate diagnostics, and warranty compliance. Every order placed before 3PM CST ships the same day, keeping your repair on schedule. Order now to get your fan coil running properly with a part built to true OEM standards.

Compatibility

This part is compatible with Carrier model FC4BNB042020AAAA.

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 Fan Coil Model FC4BNB042020AAAA?
Yes. This is the factory-specified OEM control board for the Carrier Fan Coil Model FC4BNB042020AAAA. 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 Fan Coil Model FC4BNB042020AAAA?
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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