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The Goodman 20162904 Primary Limit Temperature Control is the genuine OEM high-limit safety switch for the AMVC80803BXBC gas furnace and compatible Goodman/Amana models. Mounted on the heat exchanger or blower deck, this control continuously monitors supply-air temperature and shuts off the burners if the furnace overheats — protecting the heat exchanger from cracking and preventing a fire hazard. A failed primary limit is a common cause of short-cycling, no-heat, and lockout faults.
This genuine OEM control is calibrated to the exact cut-out and cut-in temperatures Goodman specifies for this furnace. Generic aftermarket limits often carry different trip points or mounting geometry, which can allow the heat exchanger to overheat or cause nuisance trips. OEM ensures correct temperature calibration and a bolt-in fit.
Moderate (2/5). Two screws and a wire harness. Power must be disconnected first, and the replacement must be seated in the identical location for accurate sensing. Verify furnace operation and temperature rise after installation.