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Goodman

OEM Goodman Wiring Harness for WGHP4318AAA — B1225020

SKU: GOODMAN-881 Brand: Goodman
$14.95 $20.18

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Texas CMBL #19328542014
SAM.gov Registered
Govt POs Accepted

The Goodman B1225020 wiring harness is the genuine OEM harness assembly built for the WGHP4318AAA packaged air conditioner. It carries pre-terminated, color-coded leads and factory connectors that link control and power components inside the unit. Cracked insulation, melted terminals, or rodent damage are the usual reasons for replacement — and using the OEM harness means every connector lands exactly where the schematic expects it.

  • OEM Part Number: B1225020
  • Part Type: Pre-terminated wiring harness assembly
  • Fits: Goodman WGHP4318AAA package unit
  • Brand: Goodman (OEM)
  • Connectors: Factory-keyed, color-coded leads

OEM vs. Generic: Building a harness from loose wire and crimps is error-prone and time-consuming. The B1225020 arrives with the correct gauge, lead lengths, and keyed plugs so there's no guessing about polarity or routing — a generic substitute rarely matches the connector geometry of this unit.

Install Difficulty: Moderate (3/5). Plan 30–45 minutes. Kill power at the disconnect, photograph the existing routing, transfer one connector at a time to avoid mix-ups, and secure the harness clear of moving fan blades and hot surfaces before closing the panel.

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

Frequently Asked Questions

Does this Wiring Harness fit my Goodman WGHP4318AAA — B1225020?
Yes. This is the factory-specified OEM wiring harness for the Goodman WGHP4318AAA — 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 WGHP4318AAA — 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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Mike Rivera
HVAC Parts Specialist — Online