{"product_id":"oem-goodman-burner-orifice-45-for-gsm100-4-furnace-b2589345","title":"OEM Goodman Burner Orifice #45 for GSM100-4 Furnace — B2589345","description":"\u003cp\u003eThe \u003cstrong\u003eGoodman B2589345 Burner Orifice (#45)\u003c\/strong\u003e is a genuine OEM brass gas spud for \u003cstrong\u003eGSM100-4\u003c\/strong\u003e furnaces and compatible Goodman\/Amana models. Threaded into the manifold, the orifice meters the exact volume of gas delivered to each burner, setting the furnace's rated BTU input. The \u003cstrong\u003e#45 drill size\u003c\/strong\u003e is the factory natural-gas metering for this model.\u003c\/p\u003e\u003cp\u003eA damaged, corroded, or incorrectly sized orifice causes lazy yellow flames, sooting, delayed ignition, or under-firing. Replacing a bad spud — or swapping the full set during service — restores clean, efficient combustion at the manufacturer's specified input.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart type:\u003c\/strong\u003e Burner orifice \/ gas spud\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill size:\u003c\/strong\u003e #45\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFuel:\u003c\/strong\u003e Natural gas\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Machined brass, precision-drilled\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFits:\u003c\/strong\u003e Goodman GSM100-4 and compatible Goodman \u0026amp; Amana furnaces\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Part #:\u003c\/strong\u003e B2589345\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eOEM vs. Generic:\u003c\/strong\u003e Orifice sizing is safety-critical — the OEM B2589345 is drilled and deburred to Goodman's exact #45 spec, guaranteeing correct input and clean flame geometry. Generic spuds vary in bore tolerance and can over- or under-fire the furnace. Always match the OEM size for gas appliances.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eInstall difficulty:\u003c\/strong\u003e Moderate (3\/5). Turn off gas and power, remove the burner assembly, unthread the old orifice, and thread in the new spud (do not overtighten). Leak-test with soapy solution before relighting. Best performed by a qualified technician. About 30 minutes.\u003c\/p\u003e","brand":"Goodman","offers":[{"title":"Default Title","offer_id":63058181292403,"sku":"GOODMAN-B2589345","price":13.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-goodman-burner-orifice-45-for-gsm100-4-furnace-b2589345","provider":"National HVAC Parts","version":"1.0","type":"link"}