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The Goodman 0130F00038 Auxiliary Limit Switch (identified by its light-blue housing) is a genuine OEM secondary safety control for the Goodman ACVC960804CNBA gas furnace and compatible Goodman/Amana models. This auxiliary limit provides backup over-temperature protection, opening the control circuit to shut down the furnace if abnormal heat is detected near the blower compartment or heat exchanger — guarding against airflow loss and component damage. Color coding (light blue) identifies its specific trip temperature, so matching the exact part is essential.
The genuine Goodman OEM auxiliary limit is factory-calibrated to the light-blue temperature rating for the ACVC960804CNBA. Installing a switch with a different color/trip point can cause nuisance shutdowns or compromise safety protection. Always match the OEM color code.
Disconnect power, note the wiring, remove the mounting screws, and install the new switch in the same location and orientation. Confirm continuity with a meter at room temperature. Estimated time: 15–20 minutes; best performed by an HVAC technician.
Match the light-blue color code and verify your model/serial before ordering.