{"product_id":"903404-nordyne-replacement-combustion-booster-assembly","title":"903404 Nordyne Combustion Blower Assembly (OEM)","description":"\u003ch1\u003e903404 Nordyne Combustion Blower Assembly \u003c\/h1\u003e\n\u003ch2\u003eProduct Overview\u003c\/h2\u003e\n\u003cp\u003e\u003cspan\u003e903404 is a factory-original Nordyne combustion blower assembly designed for M1 series gas furnaces. It delivers the precise airflow needed to support proper fuel combustion and safe burner operation. This OEM unit comes fully assembled with motor, blower wheel, mounting bracket, and wiring pigtail for a direct plug-and-play replacement.\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eVoltage: 115 VAC\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eTypical current draw: 0.8 – 1.2 A\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eSpeed: 3,400 RPM\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eBlower wheel diameter: 2.5 in\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eShaft material: Stainless steel with ball bearings\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eHousing material: Stamped galvanized steel\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eWiring: Pre-terminated pigtail for quick hookup\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eWeight: 3.75 lb\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003ch2\u003eCross-Reference Part Numbers\u003c\/h2\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eOEM Part Number\u003c\/th\u003e\n\u003cth\u003eReplaces \/ Supersedes\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e903404\u003c\/td\u003e\n\u003ctd\u003e65404\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003e\u003cspan\u003eThis combustion blower assembly fits Nordyne M1 line gas furnaces, including but not limited to:\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eM1GB077, M1GB090\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eM1GC077, M1GC090\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eM1GD077, M1GD090\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eM1GH077, M1GH090\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eM1MA056, M1MA070\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eM1MB056, M1MB070, M1MB077, M1MB090\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eM1MC056, M1MC070, M1MC077, M1MC090\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eM1MD056, M1MD070, M1MD077, M1MD090\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan\u003eAlways verify your furnace’s model number on the data plate before ordering.\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003ch2\u003eTechnician Notes\u003c\/h2\u003e\n\u003col start=\"1\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eSwitch off power at the service disconnect and shut off the gas supply.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eRemove furnace access panels and photograph the existing blower assembly’s wiring and bracket layout.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eLabel or tag each wire for accurate reconnection.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eUnbolt the blower mounting bracket and slide out the old assembly.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eInspect the blower wheel and housing for damage or debris; clean the compartment if needed.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eInstall the new assembly, ensuring the blower wheel clears adjacent components.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eSecure mounting bolts to manufacturer’s torque specifications.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eReconnect wiring per your photo or tags, and restore power and gas.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eInitiate a heat call; verify blower spins smoothly and delivers airflow without unusual noise.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003ch2\u003eAdditional Resources\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eOEM wiring diagram and installation instructions (PDF)\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003ePrintable combustion blower cross-reference sheet\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eNordyne combustion blower assembly for many M1 models. Brings air for combustion to the burner. 115V. When looking inside the assembly, it contains two blower wheels (white and black). Outside diameter on end with white wheel is 5.5\". Outside diameter on end with black wheel is 5-1\/8\". Length of complete unit is 7-7\/8\". Flow probe included and installed. Male 2-prong molex plug. Replaces 621787.\u003c\/p\u003e\n\u003cdiv align=\"center\"\u003e\u003ca href=\"http:\/\/www.mobilehomerepair.com\/TechTip2.html\" title=\"Quick Tech Tip\"\u003eClick For a Quick Tech Tip\u003c\/a\u003e\u003c\/div\u003e\n\u003cdiv align=\"center\"\u003e\n\u003ctable class=\"table-responsive-simple\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eNordyne\u003c\/th\u003e\n\u003ctd\u003e903404\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eNordyne\u003c\/th\u003e\n\u003ctd\u003eM1MB056ABW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e","brand":"Quinn","offers":[{"title":"Default Title","offer_id":13173307523,"sku":"903404","price":162.75,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1071\/8320\/products\/903404-nordyne-combustion-booster-assembly-3.jpeg?v=1566073004","url":"https:\/\/hvacpartstore.com\/products\/903404-nordyne-replacement-combustion-booster-assembly","provider":"HVACpartstore","version":"1.0","type":"link"}