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The Goodman 0130F00038 Auxiliary Limit Switch (Light Blue) is a genuine OEM safety control for the Amana/Goodman AMEC801005CXAB gas furnace. This thermally activated switch opens the control circuit if temperatures in its zone exceed the factory-set trip point — protecting the furnace from overheating due to restricted airflow, a failed blower, or a dirty filter. The color code (light blue) identifies its specific temperature rating within the furnace's limit-switch family.
OEM vs. Generic: The genuine 0130F00038 carries the exact trip temperature and reset behavior specified for this furnace. Installing a limit with the wrong temperature rating (a common risk with generic switches) can either nuisance-trip or fail to protect the equipment. Because this is a safety device, match the OEM part and color code precisely.
Install difficulty: Easy. Shut off power, disconnect the two spade terminals, remove the mounting screws, and install the replacement in the same orientation. About 10–15 minutes. Confirm normal cycling after install.