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The Goodman 0130F00038 Auxiliary Limit Switch (light blue) is a genuine OEM safety control for the AMH80703AXCC gas furnace and compatible Goodman/Amana models. This normally-closed thermal switch opens on an overtemperature condition — such as a blocked filter or failed blower — to shut off the burners and prevent heat exchanger damage.
The light-blue color code identifies its specific trip temperature; installing the matching OEM switch ensures the furnace's safety logic behaves exactly as the factory intended.
Because the OEM Goodman switch is calibrated to a precise trip point, substituting a generic limit with a different temperature rating can cause nuisance trips or, worse, fail to protect the heat exchanger. For a safety device, always match the factory color code and part number.
Easy (1 of 5). Disconnect power, remove two mounting screws, transfer the wire leads, and reinstall. Verify normal cycling after replacement. Professional service is recommended for any furnace safety component.