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The 0130F00038 is the genuine OEM auxiliary high-limit switch — identified by its light-blue body — for the Amana/Goodman AMVC81005CNAA gas furnace. This normally-closed thermal safety opens the control circuit if it senses excessive temperature at its mounting location, shutting the furnace down to prevent overheating from restricted airflow, a dirty filter, or a blower fault. The color coding denotes the specific trip temperature, so matching the exact OEM part is critical.
Limit switches are calibrated safety devices — the light-blue OEM 0130F00038 is factory-set to your furnace's exact trip temperature. A generic switch with the wrong set point can either nuisance-trip during normal operation or, worse, fail to open when it should. For any temperature-limiting safety control, always install the color-matched OEM part.
Easy (2/5). Disconnect power, note the two wire leads, remove the mounting screws, and swap in the new switch. Verify the light-blue color matches your original before installing. If the furnace is tripping the limit, also inspect the filter, blower, and airflow — a limit that keeps opening is usually signaling an underlying airflow problem, not a bad switch.