{"product_id":"oem-goodman-43-burner-orifice-for-dms80904bna-furnace-b4089343","title":"OEM Goodman #43 Burner Orifice for DMS80904BNA Furnace — B4089343","description":"\u003ch2\u003eGoodman B4089343 #43 Burner Orifice\u003c\/h2\u003e\u003cp\u003eThe Goodman \u003cstrong\u003eB4089343\u003c\/strong\u003e is a genuine OEM burner orifice (spud) drilled to a \u003cstrong\u003e#43\u003c\/strong\u003e bore for the \u003cstrong\u003eDMS80904BNA\u003c\/strong\u003e 80% AFUE gas furnace and compatible Goodman\/Amana models. The orifice threads into the manifold and meters the exact gas flow into each in-shot burner, setting the firing rate and BTU output. A worn, enlarged, or debris-clogged orifice throws off the air\/fuel ratio, causing sooting, lifting flame, or under-firing.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003ePart Number: B4089343\u003c\/li\u003e\n\u003cli\u003eFits: Goodman DMS80904BNA gas furnace\u003c\/li\u003e\n\u003cli\u003eOrifice Size: #43 drill bore (natural gas)\u003c\/li\u003e\n\u003cli\u003eFunction: Meters gas flow to burner \/ sets firing rate\u003c\/li\u003e\n\u003cli\u003eMaterial: Machined brass\u003c\/li\u003e\n\u003cli\u003eType: Direct OEM replacement\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eOEM vs. Generic\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eOEM Goodman\u003c\/strong\u003e orifices are precision-drilled and gauged to the factory #43 spec, guaranteeing the rated BTU input and clean flame. Generic spuds can vary slightly in bore diameter — even a fraction off changes the firing rate and can create a safety hazard. For correct combustion, genuine OEM is essential. Match the orifice size to your gas type and altitude.\u003c\/p\u003e\u003ch3\u003eInstall Difficulty\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eModerate (3\/5)\u003c\/strong\u003e — Shut off gas and power, unthread the old orifice from the manifold, and torque in the new spud with thread sealant rated for gas. About 30–45 minutes. Always leak-test with soap solution after. Gas work — use a licensed technician if unsure.\u003c\/p\u003e\u003cp\u003eCompatible with Goodman and Amana furnaces using #43 natural-gas orifices. Contact info@nationalhvacparts.com to verify size for your setup.\u003c\/p\u003e","brand":"Goodman","offers":[{"title":"Default Title","offer_id":63058044027251,"sku":"GOODMAN-9609","price":8.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-goodman-43-burner-orifice-for-dms80904bna-furnace-b4089343","provider":"National HVAC Parts","version":"1.0","type":"link"}