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This genuine Goodman/Amana 10716003 natural gas orifice (spud) is the factory replacement for the AMH81405DNAC gas furnace and many other Goodman, Amana and Daikin models sharing the same burner assembly. The orifice meters the exact volume of natural gas into each burner tube — a worn, corroded, or wrong-drill-size orifice causes poor ignition, sooting, delayed light-off, or an out-of-spec BTU input. Using the OEM part guarantees the correct drill number for a clean, safe blue flame.
Generic orifices are often drilled to a nominal size and can vary by several thousandths of an inch, throwing off gas input and combustion. This OEM Goodman orifice is drilled to the manufacturer's exact specification for the AMH8 series, so your furnace fires at its rated efficiency and passes a combustion analysis. When replacing one orifice on a multi-burner rack, replace the full set for even flame across all burners.
Requires shutting off gas, removing the burner assembly, and swapping the orifice with a nut driver. HVAC experience recommended; a post-install combustion/leak check is required. Always follow lockout/tagout and local gas codes, or hire a licensed technician.