{"product_id":"oem-goodman-16-pin-wiring-harness-for-gmp100-3-furnace-b1378700","title":"OEM Goodman 16-Pin Wiring Harness for GMP100-3 Furnace — B1378700","description":"\u003ch2\u003eGoodman B1378700 16-Pin Wiring Harness\u003c\/h2\u003e\u003cp\u003eThe B1378700 is a genuine OEM 16-pin wiring harness for the Goodman GMP100-3 gas furnace. This main harness carries power and low-voltage control signals between the integrated furnace control board and the furnace's components — blower, igniter circuit, limit and rollout switches, and gas valve leads. Melted connectors, chafed insulation, or corroded pins cause intermittent no-heat faults and blower problems, and a factory-terminated harness eliminates the guesswork of splicing individual wires.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003ePart number: B1378700\u003c\/li\u003e\n\u003cli\u003eConnector: 16-pin main harness\u003c\/li\u003e\n\u003cli\u003eCompatibility: Goodman GMP100-3 gas furnace control board\u003c\/li\u003e\n\u003cli\u003eType: Pre-terminated OEM plug-and-play harness\u003c\/li\u003e\n\u003cli\u003eFit: Direct replacement — keyed connector\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eOEM vs. Generic\u003c\/h3\u003e\u003cp\u003eThe OEM 16-pin harness uses the correct keyed connector, wire gauge, and pin assignments so it plugs directly into the Goodman control board with no rewiring. Generic bulk wire and crimp connectors introduce failure points and can miswire the low-voltage circuit. For a safe, code-compliant repair, use the OEM harness.\u003c\/p\u003e\u003ch3\u003eInstallation Difficulty\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eModerate (3\/5).\u003c\/strong\u003e The connector is keyed and unplugs by hand, but routing and reconnecting each lead correctly takes care. Photograph the original routing first. Recommended for experienced DIYers or an HVAC tech. Always shut off power and gas before servicing.\u003c\/p\u003e","brand":"Goodman","offers":[{"title":"Default Title","offer_id":63058136170867,"sku":"GOODMAN-11872","price":39.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-goodman-16-pin-wiring-harness-for-gmp100-3-furnace-b1378700","provider":"National HVAC Parts","version":"1.0","type":"link"}