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The Goodman 10716005 Natural Gas Orifice is a genuine OEM burner spud for the AMVC800804CXAA two-stage variable-speed 80% AFUE gas furnace. The orifice threads into the gas manifold and meters the precise volume of natural gas delivered to each in-shot burner. Its drilled bore diameter sets the furnace's BTU input and air-fuel ratio, so a worn, corroded, or incorrectly sized orifice directly causes under-firing, over-firing, sooting, or delayed ignition.
Orifice bore size is furnace-specific and altitude-dependent. The OEM 10716005 is factory-drilled to the exact diameter this model requires for its rated input. Generic or mis-drilled orifices change the BTU output and can create dangerous incomplete combustion. Always match the OEM spud size — and never install an LP orifice on a natural-gas unit.
A simple threaded replacement. Shut off gas and power, back the old orifice out of the manifold with a nut driver or wrench, and thread in the new 10716005 snugly without over-torquing. A licensed technician should verify manifold pressure and flame quality after the swap.