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Carrier

OEM Carrier Air Handler Control Board for Model FB4BSX036000AAAA

SKU: carrier-control-board-fb4bsx036000aaaa 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 Air Handler Control Board for Model FB4BSX036000AAAA

This genuine OEM Carrier control board is the electronic core of your FB4BSX036000AAAA fan coil air handler, managing blower startup, fan speed staging, and the control signals exchanged with your thermostat and outdoor unit. Telltale signs of a failed board include no airflow, erratic cycling, blower lockout, or a unit that won't turn on. Dropping in this exact-fit replacement restores steady comfort and protects the rest of your system from voltage problems. It is engineered specifically for the Carrier FB4BSX036000AAAA (3-ton) air handler, with the original terminal layout, relay ratings, and harness connectors so no rewiring is needed. Installation is moderate difficulty and best left to a qualified HVAC technician; always cut power before servicing. Each board ships in anti-static protective packaging and leaves the warehouse same-day on orders before 3PM CST. Opting for an authentic OEM Carrier board rather than a generic substitute maintains factory tolerances, full compatibility, and the longest reliable life for your air handler.

Compatibility

This part is compatible with Carrier model FB4BSX036000AAAA.

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 FB4BSX036000AAAA?
Yes. This is the factory-specified OEM control board for the Carrier Model FB4BSX036000AAAA. 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 FB4BSX036000AAAA?
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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