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OEM Carrier Control Board HK42FZ for Model HC1AJX024000AAAA
Carrier

OEM Carrier Control Board HK42FZ for Model HC1AJX024000AAAA

SKU: carrier-control-board-hc1ajx024000aaaa Brand: Carrier
$199.95

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 HK42FZ for Model HC1AJX024000AAAA

This OEM Carrier control board is the central circuit board for the HC1AJX024000AAAA packaged unit, coordinating the ignition sequence, blower timing, safety lockouts, and communication between the thermostat and major components. When your unit short-cycles, fails to ignite, or the blower runs continuously, a failed control board is a common cause. Built to Carrier's exact factory specifications, this board restores reliable operation and protects downstream components from voltage faults. Installation is moderate difficulty and best handled by an HVAC technician, since it requires disconnecting power, transferring wire harnesses pin-for-pin, and verifying DIP switch settings against the original. Most techs complete the swap in 30-45 minutes. Always confirm the part number printed on your existing board before ordering. This is a genuine OEM replacement, not a universal aftermarket substitute, ensuring correct fit and full diagnostic compatibility with your HC1AJX024000AAAA. Orders placed before 3PM CST ship same-day, so you can get your system back online fast. In stock and ready to ship.

Compatibility

This part is compatible with Carrier model HC1AJX024000AAAA.

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 HC1AJX024000AAAA?
Yes. This is the factory-specified OEM control board for the Carrier Model HC1AJX024000AAAA. 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 HC1AJX024000AAAA?
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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