What are the specs for this Wiring Harness?

The correct replacement for Goodman model GMN080-4 — B1378701 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 GMN080-4 — B1378701.

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 5-Pin Wiring Harness for GMN080-4 — B1378701

Name: OEM Goodman 5-Pin Wiring Harness for GMN080-4 — B1378701
Brand: Goodman
SKU: GOODMAN-11567
Price: 11.95 USD
Availability: InStock

SKU: GOODMAN-11567 Brand: Goodman

$11.95 $15.95

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Goodman B1378701 5-Pin Wiring Harness

The Goodman B1378701 is a genuine OEM 5-pin wiring harness designed for the GMN080-4 gas furnace. This plug-in harness carries low-voltage and control signals between furnace components — typically the control board and a downstream device — using a keyed 5-position connector so it seats in one orientation and can't be miswired. Over time, harness connectors can corrode, melt near heat, or develop intermittent connections that cause erratic furnace behavior, dropped signals, or no-heat faults. A fresh OEM harness restores clean, reliable connections.

Specifications

Part number: B1378701
Connector: 5-pin keyed plug
Application: Furnace control/low-voltage harness
Fits: Goodman GMN080-4 furnace
Equipment: Gas furnace
Type: Direct OEM plug-in replacement

OEM vs. Generic

The OEM B1378701 arrives pre-terminated with the correct connector housing, pinout, and wire gauge — plug in and go. A generic alternative usually means loose crimp terminals you assemble yourself, with real risk of a wrong pin position or a poor crimp that causes intermittent faults. For a component this inexpensive, OEM is the clear choice.

Installation Difficulty

Very Easy (1/5). Fully plug-and-play — usually under 10 minutes. Cut power at the furnace switch, unplug the old harness, route the new one along the same path, and click it into place. No stripping, crimping, or tools required for a standard swap.

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 5-Pin Wiring Harness...

$11.95

Frequently Asked Questions

Does this Wiring Harness fit my Goodman GMN080-4 — B1378701?

Yes. This is the factory-specified OEM wiring harness for the Goodman GMN080-4 — B1378701. 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 GMN080-4 — B1378701?

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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