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OEM Carrier Integrated Furnace Control Board HK42FZ050 — PG8MVA066135A
Carrier

OEM Carrier Integrated Furnace Control Board HK42FZ050 — PG8MVA066135A

SKU: CARRIE-PG8MVA066135AAJA-CONTROL_BOARD-HK42FZ050 Brand: Carrier
✓ Guaranteed to fit PG8MVA066135A — or your money back. Terms

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Texas CMBL #19328542014
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Govt POs Accepted

OEM Carrier Integrated Furnace Control Board HK42FZ050 for Model PG8MVA066135AAJA

This OEM integrated furnace control board (IFC) is the factory-specified replacement for the Carrier PG8MVA066135AAJA gas furnace. The control board is the brain of your heating system — it sequences every operating stage, including draft inducer start-up, hot surface ignition, gas valve energizing, blower motor staging, and all safety circuit monitoring. When the board fails, symptoms range from a complete no-heat condition and hard lockout codes, to erratic blower behavior, ignition failure after trial, or a furnace that starts briefly then shuts down. Replacing the board with an exact OEM unit restores factory-programmed timing, fault detection, and multi-speed blower logic.

  • Part Number: HK42FZ050 | OEM Carrier Integrated Furnace Control Board | Factory-matched firmware and timing sequences for the PG8MVA066135AAJA
  • OEM vs Generic: OEM boards carry factory-calibrated ignition trial timing, retry counts, and blower off-delays. Aftermarket boards may use generic timing that can cause nuisance lockouts, short-cycling, or voided equipment warranties — especially on multi-stage furnace platforms.
  • Install Difficulty: 3/5 — Requires disconnecting low-voltage thermostat wiring, line-voltage blower leads, gas valve and igniter terminals. Always photograph all wiring harnesses before removal. Tools needed: 1/4" and 5/16" nut drivers, needle-nose pliers, multimeter. Turn off power and gas before servicing. ESD precautions recommended when handling the board.
  • Warranty: 1-year OEM factory warranty against defects. Ships same business day from our stocked warehouse. Includes all original mounting hardware connections per factory spec.

Compatibility: Designed as a direct drop-in replacement for Carrier model PG8MVA066135AAJA gas furnace. Verify your existing board's part number against HK42FZ050 before ordering — confirm on the board label or equipment data plate. Questions about fitment? Our HVAC parts team verifies compatibility before you order. In stock — ships today.

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 $99
  • 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 info@nationalhvacparts.com to initiate a return
  • Refunds processed within 5-7 business days

Frequently Asked Questions

Does this Control Board fit my Carrier OEM Carrier Integrated Furnace Control Board HK42FZ050 — PG8MVA066135A?
Yes. This is the factory-specified OEM control board for the Carrier OEM Carrier Integrated Furnace Control Board HK42FZ050 — PG8MVA066135A. 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 OEM Carrier Integrated Furnace Control Board HK42FZ050 — PG8MVA066135A?
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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Mike Rivera
HVAC Parts Specialist — Online