{"product_id":"oem-goodman-43-natural-gas-burner-orifice-for-gmth045-3b-b4089343","title":"OEM Goodman #43 Natural Gas Burner Orifice for GMTH045-3B — B4089343","description":"\u003cp\u003eThe \u003cstrong\u003eGoodman B4089343 Burner Orifice (#43 drill size)\u003c\/strong\u003e is a genuine OEM natural-gas spud for the \u003cstrong\u003eGMTH045-3B\u003c\/strong\u003e furnace and related Goodman\/Amana models. The orifice threads into the manifold and precisely meters the volume of gas delivered to each in-shot burner. The \u003cstrong\u003e#43 drill size\u003c\/strong\u003e is matched to the furnace's BTU input and gas type — using the correct orifice is essential for proper flame size, complete combustion, and safe operation.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e B4089343\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Threaded burner orifice \/ spud\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Size:\u003c\/strong\u003e #43\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGas Type:\u003c\/strong\u003e Natural gas\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFunction:\u003c\/strong\u003e Meters gas flow to a single in-shot burner\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFits:\u003c\/strong\u003e Goodman GMTH045-3B and related furnaces\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Goodman (OEM)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eOEM vs. Generic\u003c\/h3\u003e\u003cp\u003eOrifice sizing is not interchangeable — the drilled bore determines gas input and must match your furnace's rating and altitude. The OEM B4089343 guarantees the exact #43 bore Goodman specifies for this model. An incorrect orifice can under- or over-fire the furnace, causing sooting, short cycling, or a safety hazard.\u003c\/p\u003e\u003ch3\u003eInstallation Difficulty\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eEasy (2\/5).\u003c\/strong\u003e Shut off the gas and power, remove the burner, and unthread the orifice from the manifold with the correct socket — do not over-torque or damage the tip. Confirm the drill number matches before installing. After service, check for gas leaks and verify a proper flame. High-altitude installs may require a different orifice size.\u003c\/p\u003e","brand":"Goodman","offers":[{"title":"Default Title","offer_id":63058165760371,"sku":"GOODMAN-12534","price":5.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-goodman-43-natural-gas-burner-orifice-for-gmth045-3b-b4089343","provider":"National HVAC Parts","version":"1.0","type":"link"}