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The Goodman 0130F00038 Auxiliary Limit Switch (Light Blue) is a genuine OEM secondary high-limit safety control for the Goodman/Amana ACVC961005CNAA gas furnace and compatible 96% AFUE models. Color-coded light blue to identify its specific trip temperature, this auxiliary limit provides backup overheat protection — opening the control circuit to stop the burners if a zone of the furnace, such as the blower compartment, exceeds safe temperature.
Auxiliary limit switches commonly trip due to restricted airflow (dirty filters, closed registers, a failing blower motor). If the switch itself has aged out of calibration or will not reset, replacing it with the correctly rated OEM part restores proper safety operation.
The genuine Goodman OEM switch is matched to the exact cutout temperature the furnace was designed around — the light-blue code is not interchangeable with other colors. Substituting a generic or wrong-temperature limit risks nuisance trips or inadequate protection. OEM guarantees the right rating and terminal fit.
Difficulty: Easy (1/5). A quick two-wire replacement, usually under 10 minutes. Disconnect power before servicing and confirm airflow is unrestricted before returning the furnace to service.