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The Goodman 20162903 Primary Limit Switch is a genuine OEM high-limit safety control rated at 150°F for Goodman/Amana AMVC80603BXCA furnaces. Mounted on the heat exchanger or blower housing, this snap-disc switch continuously monitors supply-air temperature. If airflow is restricted — from a dirty filter, blocked ducts, or a failing blower — and temperatures reach the set point, the switch opens to de-energize the burners and prevent overheating damage.
The trip temperature on a limit switch must match your furnace exactly. This OEM Goodman 150°F switch is calibrated and terminal-matched to the original. A generic switch with a different set point can cause nuisance shutdowns or, worse, allow unsafe overheating. For any safety limit control, choose OEM.
Easy (2/5). Disconnect power, unplug the two spade terminals, remove the mounting screws, and install the new switch in the same orientation. Roughly 15 minutes with a nut driver. Replace a dirty filter and confirm proper airflow before restarting.