What are the specs for this Wiring Harness?

The correct replacement for Goodman model GMT070-4A — 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 GMT070-4A — 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 GMT070-4A — B1225020

Name: OEM Goodman Wiring Harness for GMT070-4A — B1225020
Brand: Goodman
SKU: GOODMAN-12333
Price: 9.95 USD
Availability: InStock

SKU: GOODMAN-12333 Brand: Goodman

$9.95 $12.95

OEM Guaranteed

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Texas CMBL #19328542014

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The Goodman B1225020 Wiring Harness is a genuine OEM pre-terminated harness built for the GMT070-4A package unit. It carries power and control signals between the control board, contactor, transformer, and motor using factory-correct gauge wire, connectors, and terminals. Melted insulation, burnt terminals, or rodent damage in the original harness leads to intermittent faults, no-heat/no-cool calls, and hard-to-diagnose shorts — a new harness restores clean, reliable connections.

Specifications

OEM Part Number: B1225020
Type: Pre-terminated wiring harness
Connectors: Factory plug/terminal configuration
Fits: Goodman GMT070-4A and related package units
Color-coded to the unit wiring diagram

OEM vs. Generic

The OEM harness arrives with the correct connector bodies, wire colors, and lengths, so it plugs in exactly like the original with no splicing or guesswork. Building a harness from generic wire risks wrong gauge, loose crimps, and mis-terminations that can damage the control board. For an electrical assembly, the plug-and-play OEM part is well worth the small premium.

Installation Difficulty

Moderate (2/5). Cut power at the disconnect, photograph the existing connections, then unplug and route the new harness following the unit's wiring diagram. Match every connector to its labeled terminal and verify no wires contact hot or moving parts before restoring power. Plan on 20–30 minutes.

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 GMT070-4A — B1225020?

Yes. This is the factory-specified OEM wiring harness for the Goodman GMT070-4A — 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 GMT070-4A — 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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