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Carrier

OEM Carrier Control Board HK42FZ034 for Model FA4CNF024000AAAA

SKU: carrier-control-board-fa4cnf024000aaaa Brand: Carrier
$124.95

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 FA4CNF024000AAAA

This OEM Carrier control board (HK42FZ034) is the main circuit board that controls operation of your Carrier FA4CNF024000AAAA fan coil air handler. It manages blower motor timing, interprets thermostat signals, and enforces onboard safety logic to keep your system heating and cooling dependably. A failing board commonly causes a no-start blower, random shutdowns, or unpredictable cycling. Engineered to exact Carrier factory specifications, this genuine replacement guarantees a precise fit and restores original performance to the FA4CNF024000AAAA. Installation difficulty is moderate and best performed by a licensed HVAC technician, since it involves disconnecting line-voltage wiring and carefully moving connectors to matching terminals; experienced pros typically complete the job in under an hour. Always cut power at the breaker before servicing. Choosing an authentic OEM board protects your equipment warranty and ensures complete system compatibility. In stock and shipping same-day on orders placed before 3PM CST. Shop NationalHVACParts.com for genuine Carrier parts and fast, reliable delivery you can trust.

Compatibility

This part is compatible with Carrier model FA4CNF024000AAAA.

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 FA4CNF024000AAAA?
Yes. This is the factory-specified OEM control board for the Carrier Model FA4CNF024000AAAA. 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 FA4CNF024000AAAA?
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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