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The Goodman B1370187 is a genuine OEM 160°F primary high-limit switch designed as a direct-fit replacement for the Goodman/Amana AMS80703ANA gas furnace. Mounted on the heat-exchanger partition, this control senses supply-plenum temperature and shuts off the gas valve if the furnace overheats — the main line of defense against a cracked heat exchanger and cabinet damage. It also cycles the blower to dissipate residual heat on shutdown.
The OEM Goodman limit is factory-calibrated to the exact 160°F set point and bracket footprint for a plug-and-play swap. The Generic option is a quality aftermarket equivalent with a matching trip rating, delivering dependable overheat protection for less.
Easy (1/5). Two spade terminals and two mounting screws. Cut power before servicing, and rule out low airflow (dirty filter, closed registers, weak blower) before replacing a limit that trips repeatedly.