What are the specs for this Wiring Harness?

The correct replacement for Goodman model APH1549M41AD Heat Pump — B1378700 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 APH1549M41AD Heat Pump — B1378700.

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 16-Pin Wiring Harness for APH1549M41AD Heat Pump — B1378700

Name: OEM Goodman 16-Pin Wiring Harness for APH1549M41AD Heat Pump — B1378700
Brand: Goodman
SKU: GOODMAN-15689
Price: 18.95 USD
Availability: InStock

SKU: GOODMAN-15689 Brand: Goodman

$18.95 $24.95

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Goodman B1378700 16-Pin Wiring Harness

Restore reliable control connections in your Goodman/Amana APH1549M41AD heat pump with this genuine OEM B1378700 16-pin wiring harness. The harness links the control board to the unit's low-voltage components — defrost sensor, reversing valve, contactor, pressure switches, and fan circuit — through a single keyed 16-position plug. Melted terminals, chewed insulation (rodent damage), or corroded pins cause intermittent faults, no-defrost conditions, and comfort complaints that are far easier to fix with a fresh harness than by chasing individual wires.

Specifications

Connector: 16-pin (16-position) keyed control plug
Terminals: Factory-crimped, pre-tinned for corrosion resistance
Insulation: High-temperature, outdoor/UV-rated wire jacket
Application: Low-voltage control interconnect harness
Fits: Goodman & Amana APH1549M41AD heat pump control assembly

OEM vs. Generic

Wiring harnesses are model-specific: pin assignments, wire colors, gauge, and connector keying all have to match the control board and components. The OEM B1378700 is a true plug-and-play replacement with correct pinout and lead lengths. Generic or hand-built harnesses risk miswiring, which can damage the board or compressor — always use the factory harness.

Installation Difficulty

Moderate (2/5). No refrigerant work required, but you must de-energize the unit, photograph the routing, and transfer each connection carefully. A tech (or careful DIYer) can replace it in 30–45 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 16-Pin Wiring Harnes...

$18.95

Frequently Asked Questions

Does this Wiring Harness fit my Goodman APH1549M41AD Heat Pump — B1378700?

Yes. This is the factory-specified OEM wiring harness for the Goodman APH1549M41AD Heat Pump — B1378700. 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 APH1549M41AD Heat Pump — B1378700?

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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