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The genuine Goodman/Amana 0130F00038 auxiliary limit switch, identified by its light-blue body, is a secondary overheat safety control for the AMEC960804CNAC gas furnace. Typically mounted near the blower housing, it opens the control circuit if temperatures in that zone climb too high — a backup to the primary limit that guards against blower failure and localized overheating. The blue color code designates its specific trip temperature range within the Goodman/Amana limit family.
Color-coded OEM limits are matched to an exact trip setpoint; installing the wrong-color or generic switch can cause premature shutdowns or fail to protect the unit. Always match the OEM color code. The genuine 0130F00038 ensures the correct setpoint and factory fit while keeping your warranty intact.
Rated Easy — 10–15 minutes. Disconnect power, unplug the spade terminals, remove the mounting screws, install the new switch, and reconnect. Verify the light-blue color matches the switch you removed before installing.