What are the specs for this Wiring Harness?

The correct replacement for Goodman model AMH80903BXAA — 0259F00018 is this exact part. It is the factory-specified replacement with exact OEM specifications. Using a part with different specifications can cause equipment damage or void your warranty. You can verify this by checking the data plate on your Goodman equipment which lists the model number AMH80903BXAA — 0259F00018.

What symptoms indicate I need a new wiring harness?

Common symptoms that indicate you need a new wiring harness include unusual noises, intermittent operation, complete failure to operate, or visible damage. For specific diagnostic guidance, visit nationalhvacparts.com/pages/hvac-diagnostic.

Is this wiring harness compatible with Bryant or Payne systems too?

Many Goodman parts are cross-compatible with Bryant and Payne systems since all three brands are manufactured by Carrier Global Corporation. The same physical part is often used across multiple brand labels with different model numbers. To verify cross-compatibility, check your Bryant or Payne equipment service manual for cross-compatible part numbers, or contact info@nationalhvacparts.com with your model number for confirmation.

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Goodman

OEM Goodman 12-Pin Wiring Harness for AMH80903BXAA — 0259F00018

Name: OEM Goodman 12-Pin Wiring Harness for AMH80903BXAA — 0259F00018
Brand: Goodman
SKU: GOODMAN-5726
Price: 23.95 USD
Availability: InStock

SKU: GOODMAN-5726 Brand: Goodman

$23.95 $30.95

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Texas CMBL #19328542014

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The Goodman 0259F00018 12-Pin Wiring Harness is the genuine OEM connector assembly for AMH80903BXAA 80% AFUE furnaces. This harness carries low-voltage signals between the integrated furnace control board and the furnace's switches, sensors, and motor circuits. Melted, brittle, or corroded connectors cause intermittent lockouts and hard-to-trace no-heat faults; a fresh harness with keyed, pre-terminated plugs eliminates those failure points and makes board swaps quick and error-free.

Specifications

OEM Part Number: 0259F00018
Component: 12-pin low-voltage wiring harness
Fits: Goodman & Amana AMH80903BXAA furnaces
Connector: 12-position keyed plug
Wire: Color-coded, factory-crimped terminals
Equipment: 80% AFUE gas furnace

OEM vs. Generic

The OEM harness matches factory pin-out, wire gauge, and connector keying exactly, so it seats into the control board without rewiring. A Generic universal harness can work but often requires re-pinning terminals to the correct positions — fine for experienced techs, not ideal for a fast repair.

Installation Difficulty

Moderate (2/5). Kill power at the disconnect, photograph the existing connections, then unplug the old harness and route the new one along the same path. Because it is keyed, the 12-pin plug only seats one way. Verify each branch lands on its original component. Typical time: 20–30 minutes.

Confirm all spade terminals are fully seated and strain-relieved before restoring power.

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

OEM Goodman 12-Pin Wiring Harnes...

$23.95

Frequently Asked Questions

Does this Wiring Harness fit my Goodman AMH80903BXAA — 0259F00018?

Yes. This is the factory-specified OEM wiring harness for the Goodman AMH80903BXAA — 0259F00018. 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 wiring harness on my Goodman AMH80903BXAA — 0259F00018?

Refer to your equipment service manual for model-specific steps. General approach: turn off power, photograph connections, remove old part, install new part, restore power and test. For gas components, hire a licensed technician. Email info@nationalhvacparts.com for guidance.

What symptoms mean I need a new wiring harness?

Common symptoms: unusual noises, intermittent operation, complete failure, or visible damage. Visit our diagnostic hub for symptom-based troubleshooting.

Is this wiring harness compatible with Bryant or Payne too?

Many Goodman 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 Goodman wiring harness?

OEM recommended for reliability and warranty compatibility. OEM parts match exact factory specifications for proper fit, performance, and safety. While aftermarket alternatives cost less upfront, the risk of improper fit and reduced lifespan usually makes OEM the better value long-term.

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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