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The Goodman 20162903 is a factory-original primary high-limit switch engineered for the AMH950905DXAC gas furnace and compatible Goodman/Amana models. This normally-closed safety control monitors heat-exchanger and plenum temperature, opening the circuit to shut off the gas valve and burners if temperature exceeds its 150°F trip point. It is a critical safety component — a failed or out-of-spec limit switch is a common cause of short-cycling, no-heat calls, and lockout faults.
This is a genuine OEM Goodman component with the exact trip temperature, bracket geometry, and mounting hole pattern the furnace was designed around. Generic limit switches often carry a nearby-but-different trip rating that can cause nuisance trips or fail to protect the heat exchanger. Choose OEM for guaranteed calibration and warranty compliance.
Difficulty: Easy. Cut power at the disconnect, remove two mounting screws, transfer the spade connectors, and reinstall. Typically a 10–15 minute repair for a technician or a confident DIYer. Always verify power is off before servicing.