{"product_id":"oem-goodman-integrated-furnace-control-board-for-gun125-5b-b1809904s","title":"OEM Goodman Integrated Furnace Control Board for GUN125-5B — B1809904S","description":"\u003cp\u003eThe \u003cstrong\u003eGoodman B1809904S Integrated Furnace Control Board\u003c\/strong\u003e is the genuine OEM \"brain\" of your \u003cstrong\u003eGUN125-5B\u003c\/strong\u003e gas furnace. This board manages the ignition sequence, gas valve timing, blower and inducer relays, safety limit monitoring, and diagnostic fault codes. If your furnace won't ignite, short-cycles, blows cold air, or flashes an error code, a failed control board is a frequent culprit. Installing the correct OEM board restores factory sequencing and safety logic.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e B1809904S\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Integrated furnace control (IFC) circuit board\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eControl Voltage:\u003c\/strong\u003e 24V thermostat \/ 120V line input\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFunctions:\u003c\/strong\u003e Ignition control, blower\/inducer relays, limit \u0026amp; flame-sense monitoring, diagnostic LED\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Goodman (Amana\/Janitrol family)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatibility:\u003c\/strong\u003e GUN125-5B gas furnace\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eOEM vs. Generic\u003c\/h3\u003e\u003cp\u003eThe genuine B1809904S ships pre-flashed with the correct ignition and blower timing for your furnace model. Generic or \"universal\" boards may require re-jumpering, can mismatch relay ratings, and often void manufacturer warranty. For a safety-critical component that controls the gas valve, we strongly recommend genuine OEM.\u003c\/p\u003e\u003ch3\u003eInstall Difficulty\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eModerate (3 of 5).\u003c\/strong\u003e Roughly 30–45 minutes. Photograph the wiring harness before disconnecting and transfer leads one at a time. Because this board controls the gas valve, we recommend a licensed HVAC technician for installation and post-repair combustion checks.\u003c\/p\u003e","brand":"Goodman","offers":[{"title":"Default Title","offer_id":63058190532979,"sku":"GOODMAN-13181","price":191.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-goodman-integrated-furnace-control-board-for-gun125-5b-b1809904s","provider":"National HVAC Parts","version":"1.0","type":"link"}