Same-day shipping on orders before 3PM CST · 15,000+ OEM Parts In Stock · Carrier · Bryant · ICP · Heil · Tempstar
Track Order | 1-800-NHP-HVAC | Trade Accounts

Menu

Home Shop All Account Cart
Home / OEM Carrier Control Board HK42FZ Seri...

IMAGE COMING SOON

Carrier

OEM Carrier Control Board HK42FZ Series for Model FB4BNL024L00AAAA

SKU: carrier-control-board-fb4bnl024l00aaaa Brand: Carrier
$189.95

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

OEM Guaranteed

Same-Day Ship

30-Day Returns

Secure Checkout

OEM Carrier Control Board HK42FZ Series for Model FB4BNL024L00AAAA

This OEM Carrier control board is the integrated furnace control (IFC) for the FB4BNL024L00AAAA fan coil unit, managing blower operation, relay sequencing, and safety interlocks. When your air handler fails to power on, the blower won't cycle, or you see erratic fan behavior, a faulty board is the most common cause. Engineered to exact Carrier specifications, this board restores reliable communication between your thermostat, blower motor, and heating elements on the FB4BNL024L00AAAA. Installation is moderate difficulty: a competent DIYer with basic electrical knowledge can swap it in about 30-45 minutes by photographing wire positions, transferring connectors one at a time, and confirming the board model match. We strongly recommend cutting power at the breaker first. Using a genuine OEM board protects your warranty and ensures proper fit, unlike generic substitutes. In stock and ships same-day when you order before 3PM CST. Order with confidence from National HVAC Parts for guaranteed Carrier compatibility and fast, reliable delivery to your door.

Compatibility

This part is compatible with Carrier model FB4BNL024L00AAAA.

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 FB4BNL024L00AAAA?
Yes. This is the factory-specified OEM control board for the Carrier Model FB4BNL024L00AAAA. 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 FB4BNL024L00AAAA?
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.
Home Shop Search Account Cart