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 HK42FZ011 f...
OEM Carrier Control Board HK42FZ011 for Model GB3AAV036035AAJA
Carrier

OEM Carrier Control Board HK42FZ011 for Model GB3AAV036035AAJA

SKU: carrier-control-board-gb3aav036035aaja 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 HK42FZ011 for Model GB3AAV036035AAJA

This OEM Carrier furnace control board (HK42FZ011) is the central controller for the GB3AAV036035AAJA gas furnace, sequencing ignition, blower on/off delays, safety lockouts, and diagnostic fault codes. It ties together the igniter, gas valve, pressure switch, flame sensor, and blower so every heating cycle runs in the correct, safe order. A failed board shows up as no ignition, repeated short-cycling, a blower stuck on or off, or blinking error codes at the sight glass. This genuine Carrier board is factory-programmed to your furnace's exact specification and uses the original connector layout, so it installs into the existing harness without jumpers or rewiring. Installation is moderate: cut power, photograph and label every plug, remove the mounting screws, move connectors one at a time to the new board, and remount—roughly 30–45 minutes. This part is compatible with Carrier model GB3AAV036035AAJA. In stock and ships same-day when ordered before 3PM CST. Swap a bad board and bring the furnace back to full reliable operation.

Compatibility

This part is compatible with Carrier model GB3AAV036035AAJA.

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 GB3AAV036035AAJA?
Yes. This is the factory-specified OEM control board for the Carrier Model GB3AAV036035AAJA. 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 GB3AAV036035AAJA?
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