What are the specs for this Wiring Harness?

The correct replacement for Goodman model GMT140-5A — 0259F00007P 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 GMT140-5A — 0259F00007P.

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 GMT140-5A — 0259F00007P

Name: OEM Goodman 12-Pin Wiring Harness for GMT140-5A — 0259F00007P
Brand: Goodman
SKU: GOODMAN-12477
Price: 29.95 USD
Availability: InStock

SKU: GOODMAN-12477 Brand: Goodman

$29.95 $37.95

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The Goodman 0259F00007P Wiring Harness is a genuine OEM 12-pin pre-terminated connector assembly built for the Goodman GMT140-5A gas furnace and compatible Goodman/Amana models. This harness routes low- and line-voltage signals between the integrated furnace control board and components such as the blower, inducer, and gas valve. A cracked connector, melted pin, or rodent-damaged wire can cause intermittent faults, no-heat calls, or blower failures — this factory harness restores clean, code-correct connections.

Specifications

Connector: 12-pin
OEM Part Number: 0259F00007P
Type: Pre-terminated wiring harness assembly
Compatible Model: Goodman GMT140-5A furnace
Application: Control board / component interconnect
Brand: Goodman (Amana compatible)

OEM vs. Generic

The OEM 0259F00007P arrives with the correct pin-out, gauge, and connector keying so it seats the first time. There is effectively no reliable generic substitute for a keyed 12-pin furnace harness — mismatched pin-outs risk shorts and board damage. We recommend genuine OEM here every time.

Installation Difficulty

Moderate (3 of 5). Plug-and-play at the connector, but requires care to trace routing, label existing plugs, and confirm each connection. Photograph the original layout before removal. Disconnect power first; if you're not comfortable with furnace wiring, use a licensed technician.

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...

$29.95

Frequently Asked Questions

Does this Wiring Harness fit my Goodman GMT140-5A — 0259F00007P?

Yes. This is the factory-specified OEM wiring harness for the Goodman GMT140-5A — 0259F00007P. 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 GMT140-5A — 0259F00007P?

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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