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The Goodman 0130F00038 Auxiliary Limit Switch (light blue) is a genuine OEM secondary safety control for the Amana/Goodman AMH80805CNBC 80% AFUE gas furnace and compatible models. Mounted on the blower/heat-exchanger area, this normally-closed thermal cutout opens the control circuit if temperatures exceed safe limits — for example during blower failure or restricted airflow — preventing overheating and cabinet damage. The light-blue color code identifies its specific trip rating.
The color-coded OEM switch guarantees the exact trip temperature Goodman specified for this position. Substituting an unmatched limit risks nuisance trips or, worse, failure to open when needed. OEM is the safe choice for any limit control.
Easy (1/5). De-energize the furnace, remove the mounting screws, transfer the wire terminals, and reinstall. A 10–15 minute swap for a homeowner or tech.