What are the specs for this Wiring Harness?

The correct replacement for Goodman model GMT070-3A — B1225020 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 GMT070-3A — B1225020.

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 Wiring Harness for GMT070-3A — B1225020

Name: OEM Goodman Wiring Harness for GMT070-3A — B1225020
Brand: Goodman
SKU: GOODMAN-12303
Price: 9.95 USD
Availability: InStock

SKU: GOODMAN-12303 Brand: Goodman

$9.95 $12.95

OEM Guaranteed

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30-Day Returns

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Texas CMBL #19328542014

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The Goodman B1225020 Wiring Harness is a genuine OEM electrical assembly for the Goodman GMT070-3A package unit. It delivers pre-cut, pre-terminated wiring with the correct gauge, connectors, and lengths to link the unit's electrical components. Damaged, melted, or corroded wiring can cause intermittent faults, nuisance lockouts, and safety hazards — this harness restores clean, reliable connections.

Specifications

Part Number: B1225020
Type: Wiring harness / wire assembly
Brand: Goodman (OEM)
Fits: GMT070-3A and compatible Goodman units
Features: Factory-terminated connectors, correct wire gauge and color coding

OEM vs. Generic

The OEM B1225020 arrives with the exact connectors and pin-outs the GMT070-3A expects, eliminating guesswork and the risk of miswiring. Building a replacement from generic wire and crimp terminals is time-consuming and error-prone; a single reversed connection can damage the control board. The genuine harness is a plug-and-play match.

Installation

Difficulty: Intermediate. With power disconnected and locked out, photograph the existing routing, then transfer connectors one at a time to avoid errors. Verify each termination against the unit wiring diagram before restoring power. No specialty tools required, but basic electrical knowledge is recommended.

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 Wiring Harness for G...

$9.95

Frequently Asked Questions

Does this Wiring Harness fit my Goodman GMT070-3A — B1225020?

Yes. This is the factory-specified OEM wiring harness for the Goodman GMT070-3A — B1225020. 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 GMT070-3A — B1225020?

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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