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The Goodman 0130F00038 Auxiliary Limit Switch (Light Blue) is a genuine OEM secondary safety control for the Amana/Goodman AMEC800804CNAB gas furnace. This color-coded (light blue) manual/auto-reset limit provides backup over-temperature protection for the blower and burner areas, tripping to shut down the furnace when temperatures exceed safe limits.
The light-blue color code corresponds to a specific factory trip temperature. Installing the wrong-rated generic switch can either nuisance-trip or fail to cut off at the intended temperature. The OEM 0130F00038 guarantees the correct rating and terminal layout for a safe, reliable swap.
Easy. With power and gas off, disconnect the two terminals, remove the mounting screws, and install the new switch in the same orientation. Roughly 15 minutes. If the original tripped, diagnose the underlying airflow or overheating cause before returning to service.