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The 20162903 is a genuine OEM primary high-limit switch rated at 150°F for the Goodman GMH951155DXAC 95% AFUE two-stage furnace. Mounted on the heat exchanger or blower deck, it continuously monitors supply-air temperature and opens the gas circuit if the furnace overheats due to a dirty filter, blocked ductwork, or blower failure. As the primary limit, it is the furnace's main line of thermal protection.
The genuine Goodman 150°F switch trips at the precise temperature this furnace's control logic expects, preventing both nuisance lockouts and unsafe overheating. Generic limits with approximate trip points can shorten heat-exchanger life or cause erratic cycling. For accurate protection, choose OEM.
Easy (1/5). Disconnect power, remove two screws and the spade connectors, and install the replacement in the same orientation. If the new limit keeps tripping, correct the airflow restriction before returning the furnace to service.