{"product_id":"oem-goodman-43-burner-orifice-for-gmth070-4b-b4089343","title":"OEM Goodman #43 Burner Orifice for GMTH070-4B — B4089343","description":"\u003cp\u003eThe \u003cstrong\u003eGoodman B4089343 #43 Burner Orifice\u003c\/strong\u003e is a genuine OEM gas metering spud for the \u003cstrong\u003eGMTH070-4B\u003c\/strong\u003e furnace. The orifice threads into the manifold and precisely meters the volume of gas delivered to each in-shot burner. Because the drill size (#43) sets the BTU input and combustion efficiency, using the correct factory orifice is critical for safe, clean-burning operation and proper flame appearance.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003ePart number: B4089343\u003c\/li\u003e\n\u003cli\u003eDrill size: #43\u003c\/li\u003e\n\u003cli\u003eType: Threaded burner orifice \/ spud\u003c\/li\u003e\n\u003cli\u003eBrand: Goodman (OEM)\u003c\/li\u003e\n\u003cli\u003eApplication: GMTH070-4B gas furnace\u003c\/li\u003e\n\u003cli\u003eFuel: Natural gas\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eOEM vs. Generic\u003c\/h3\u003e\u003cp\u003eThe #43 bore is matched to the GMTH070-4B's rated input and manifold pressure. A generic or mis-sized orifice can over- or under-fire the furnace, causing sooting, delayed ignition, or a lazy yellow flame. The OEM Goodman orifice guarantees the exact metering the appliance was certified for.\u003c\/p\u003e\u003ch3\u003eInstallation\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eDifficulty: Easy (DIY-friendly).\u003c\/strong\u003e Shut off the gas supply and furnace power, unthread the old orifice from the manifold with a socket, and hand-start the new orifice before torquing snug — do not over-tighten and crack the brass. Confirm a crisp blue flame after restart. Typically a 15-minute job.\u003c\/p\u003e\u003cp\u003eIf replacing one orifice due to clogging, inspect the remaining orifices as well.\u003c\/p\u003e","brand":"Goodman","offers":[{"title":"Default Title","offer_id":63058166481267,"sku":"GOODMAN-12561","price":9.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-goodman-43-burner-orifice-for-gmth070-4b-b4089343","provider":"National HVAC Parts","version":"1.0","type":"link"}