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The 10716003 natural gas orifice (burner spud) is a genuine Goodman/Amana part built for the AMH80703ANAB 80% AFUE gas furnace. This precision-drilled brass orifice threads into the manifold and meters the exact volume of natural gas delivered to each burner. Because the orifice bore size directly controls the BTU input and air-fuel mixture, a worn, corroded, or incorrectly sized orifice can cause sooting, lazy flames, delayed ignition, or reduced heating output.
The OEM 10716003 ships with a factory-calibrated bore matched to this furnace's manifold pressure and BTU rating — critical for safe, clean combustion. Generic orifices may be close in size but small bore-diameter variances change the gas flow enough to affect efficiency and safety. For any gas-metering component, OEM is the recommended choice.
Difficulty: Moderate (gas work — pro recommended). Shut off the gas supply and power, remove the burner assembly, unthread the old orifice, and install the replacement with proper thread sealant rated for gas. After install, verify manifold pressure and inspect the flame. If you are not comfortable working with a gas manifold, hire a licensed HVAC technician.