{"product_id":"oem-goodman-furnace-control-circuit-board-9-pin-harness-gmnt120-5b-b1809913s","title":"OEM Goodman Furnace Control Circuit Board 9-Pin Harness GMNT120-5B — B1809913S","description":"\u003cp\u003eThe Goodman \u003cstrong\u003eB1809913S Integrated Furnace Control Board\u003c\/strong\u003e is the genuine OEM brain of the Goodman \u003cstrong\u003eGMNT120-5B\u003c\/strong\u003e gas furnace. This board manages the complete heating sequence — inducer start, igniter warm-up, gas valve timing, flame sensing, and blower on\/off delays — while continuously running safety and diagnostic checks. It ships with the \u003cstrong\u003e9-pin wiring harness\u003c\/strong\u003e for a straightforward, correctly-keyed connection.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003ePart Number: B1809913S\u003c\/li\u003e\n\u003cli\u003eType: Integrated furnace control (IFC) board\u003c\/li\u003e\n\u003cli\u003eIncludes: 9-pin connector harness\u003c\/li\u003e\n\u003cli\u003eFunctions: Ignition sequencing, flame sensing, blower timing, diagnostics LED\u003c\/li\u003e\n\u003cli\u003eFits: Goodman GMNT120-5B and select Goodman\/Amana single-stage furnaces\u003c\/li\u003e\n\u003cli\u003eBrand: Goodman (OEM)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eOEM vs. Generic\u003c\/h3\u003e\u003cp\u003eA furnace control board must match the furnace's exact ignition timing, relay ratings, and connector pinout. The genuine B1809913S is programmed and terminal-mapped for the GMNT120-5B, eliminating the guesswork and jumper adapters that generic \"universal\" boards require. Given the safety-critical role of ignition and gas-valve control, OEM is strongly recommended — a mismatched board can cause hard starts, short cycling, or lockouts.\u003c\/p\u003e\u003ch3\u003eInstallation Difficulty\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eModerate (3\/5).\u003c\/strong\u003e Shut off power and gas. Photograph the existing wiring, transfer connections one at a time to the new board, and confirm the 9-pin harness is fully seated. After power-up, watch the diagnostic LED for a normal flash code and verify a full heat cycle. This job involves line-voltage and gas-control wiring — if you are unsure, hire a licensed HVAC technician.\u003c\/p\u003e","brand":"Goodman","offers":[{"title":"Default Title","offer_id":63058132009331,"sku":"GOODMAN-11763","price":184.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-goodman-furnace-control-circuit-board-9-pin-harness-gmnt120-5b-b1809913s","provider":"National HVAC Parts","version":"1.0","type":"link"}