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 HK42FZ034 f...

IMAGE COMING SOON

Carrier

OEM Carrier Control Board HK42FZ034 for Model FB4CNP036T00AAAA

SKU: carrier-control-board-fb4cnp036t00aaaa 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 HK42FZ034 for Model FB4CNP036T00AAAA

This OEM Carrier control board (HK42FZ034) is the integrated fan coil control that manages blower operation, relay timing, safety lockouts, and thermostat communication for the Carrier FB4CNP036T00AAAA air handler. Symptoms of a failed board include a blower that won't energize, erratic cycling, ignored thermostat calls, or stored diagnostic faults. This genuine Carrier replacement is built to exact factory specifications, restoring correct control sequencing and steady indoor airflow. Installation is a moderate job best suited to a licensed HVAC technician: cut power at the disconnect, photograph the wiring for reference, transfer each harness connector to the new board, and fasten it to the mounting standoffs — no programming required. Opting for the OEM board prevents the misfires and fit problems common with universal boards and preserves your warranty coverage. We stock this part and ship same-day on orders placed before 3PM CST, keeping your repair on track. Return reliable, quiet blower performance to your FB4CNP036T00AAAA with the correct Carrier control board.

Compatibility

This part is compatible with Carrier model FB4CNP036T00AAAA.

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 FB4CNP036T00AAAA?
Yes. This is the factory-specified OEM control board for the Carrier Model FB4CNP036T00AAAA. 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 FB4CNP036T00AAAA?
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