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The Goodman 20162904 Primary Limit Temperature Control is a genuine OEM high-limit safety switch for the ACVC950714CXAA furnace and compatible Goodman/Amana models. Mounted on the heat exchanger or blower deck, it continuously monitors supply-air temperature and opens the circuit if the furnace overheats — typically due to restricted airflow, a dirty filter, or a failed blower. This protects the heat exchanger from cracking and prevents unsafe operating temperatures.
This genuine OEM control is calibrated to the precise trip temperature and probe length Goodman engineered for this furnace. Generic limits with the wrong setpoint or insertion depth can trip early (short cycling) or too late (no protection). For a primary safety device, OEM is the strongly recommended choice.
Moderate — usually two screws and two spade terminals, but correct sensor positioning matters. Disconnect power before servicing. If the new limit trips repeatedly, check the filter, blower, and ductwork for airflow restriction rather than assuming a faulty part.