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The Goodman 20162903 is a genuine OEM primary high-limit switch calibrated to open at 150°F, designed for the VCSS961005CNAA 96% AFUE two-stage furnace. This normally-closed safety control monitors heat-exchanger temperature and shuts off the burners if the furnace overheats — protecting against restricted airflow, a failed blower, or a dirty filter. A furnace that trips on limit, short-cycles, or throws a limit fault code often needs this switch.
The OEM Goodman limit switch is factory-calibrated to the exact 150°F trip point and mounting footprint your furnace was engineered around. Generic universal limits may differ in trip temperature or bracket, defeating the safety design. For safety controls, always use OEM.
Easy to Moderate — power down the furnace, unclip the two spade terminals, remove the mounting screws, and install the replacement. Verify furnace operation and temperature rise after installation.