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The Goodman 0130F00038 Auxiliary Limit Switch (Light Blue) is a genuine OEM secondary thermal safety control for the AMES961005CNAA gas furnace and compatible Goodman/Amana models. This auxiliary limit backs up the primary high-limit, opening the ignition/gas circuit if it detects abnormal heat in the blower compartment or burner area — often caused by a failed blower motor, dirty filter, or restricted airflow. The color-coded light-blue body identifies its specific trip and reset temperature, so matching the exact part is essential for correct safety operation.
Because the trip point is identified by color, the OEM 0130F00038 is the safest choice — it guarantees the exact factory temperature rating. Our Generic equivalent matches the same rating and terminal layout at a lower price for out-of-warranty jobs. Verify the color/temperature match before installing.
Difficulty: Easy (1/5). Disconnect power, remove the mounting screws, transfer the spade connectors, and reinstall. About 10 minutes with a nut driver. Never bypass or jumper a limit switch — replace with the matching part.