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The Goodman 20162904 Primary Limit Temperature Control is a genuine OEM safety switch for the Amana/Goodman AMVC960803BNBA variable-capacity gas furnace. Mounted on the heat exchanger, the primary high-limit continuously monitors supply-air temperature and opens the circuit to shut off the gas valve if the furnace overheats — protecting the heat exchanger and preventing unsafe operation. A tripped or failed limit is a common cause of intermittent no-heat and burner short-cycling.
The OEM Goodman limit is calibrated to the exact trip and reset temperatures engineered for this furnace's heat exchanger and blower profile. Generic replacements with different set points can nuisance-trip or, worse, fail to protect the unit. Because this is a life-safety component, the OEM part is the recommended choice.
Easy to Moderate — DIY-friendly. Two mounting screws and two spade connectors. Cut power at the disconnect, note the wiring, and match orientation. Verify airflow and filter condition to avoid repeat trips.