What are the specs for this Wiring Harness?

The correct replacement for Goodman model GSMS080-4 — 2578400S 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 GSMS080-4 — 2578400S.

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 GSMS080-4 — 2578400S

Name: OEM Goodman Wiring Harness for GSMS080-4 — 2578400S
Brand: Goodman
SKU: GOODMAN-12968
Price: 98.95 USD
Availability: InStock

SKU: GOODMAN-12968 Brand: Goodman

$98.95 $128.95

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Texas CMBL #19328542014

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The Goodman 2578400S Wiring Harness is a genuine OEM electrical harness for the Goodman GSMS080-4 gas furnace. It carries control and line-voltage connections between the control board, gas valve, inducer, blower, and safety switches using factory-terminated, color-coded connectors for a reliable, plug-and-play repair.

Specifications

Part Number: 2578400S
Type: Furnace wiring harness
Connectors: OEM keyed, color-coded terminals
Fits: Goodman GSMS080-4 gas furnace
Equipment: Furnace

OEM vs. Generic

A wiring harness is not a place to improvise. This OEM Goodman assembly uses the exact plug bodies, pin-outs, and wire gauges the GSMS080-4 control board expects, eliminating the miswiring, melted connectors, and nuisance faults that come from splicing together generic wire. It restores original safety and diagnostics.

Installation Difficulty: Moderate

Recommended for HVAC technicians. Photograph or label each connection before removal, then transfer plugs one at a time to avoid errors. Shut off power at the disconnect first. Because the harness ties into gas and safety controls, a full operational and safety check is required after installation.

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...

$98.95

Frequently Asked Questions

Does this Wiring Harness fit my Goodman GSMS080-4 — 2578400S?

Yes. This is the factory-specified OEM wiring harness for the Goodman GSMS080-4 — 2578400S. 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 GSMS080-4 — 2578400S?

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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