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The genuine Goodman 10716005 Natural Gas Orifice is the precision-machined brass spud that meters natural gas into the in-shot burner of your AMEH800603BXAA furnace. The orifice bore is drilled to a specific diameter that sets the input rate; a worn, enlarged, or incorrectly sized orifice throws off the air-fuel ratio, causing sooting, poor efficiency, or delayed ignition.
Factory-original orifices are drilled and gauged to Goodman's exact BTU input for this model at standard natural-gas pressure. Generic orifices with even a slightly off bore diameter will over- or under-fire the furnace, hurting efficiency and safety. For a fuel-metering part, OEM sizing is non-negotiable — always confirm natural gas (not LP) before installing.
Moderate (3/5). Shut off gas and power, remove the burner assembly, thread out the old orifice from the manifold, and install the replacement to the correct torque without over-tightening. Leak-check all connections with soap solution afterward. Gas-component work — a licensed HVAC technician is recommended.