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The Goodman 0130F00038 Auxiliary Limit Switch (Light Blue) is a factory-original secondary safety control for the Amana/Goodman AMEH801005CXAA gas furnace. This auxiliary limit provides an additional layer of over-temperature protection beyond the primary limit, cutting the gas valve if abnormal heat is detected in its zone (such as a blocked blower or restricted airflow). The light-blue body denotes its specific trip-temperature rating.
The OEM 0130F00038 is factory-set to the exact trip temperature indicated by its light-blue coding. Installing a switch with the wrong color/setpoint defeats the safety design. Match the OEM color code exactly — OEM is strongly recommended for this safety device.
Easy — typically a clip- or screw-mount with two push-on terminals. Cut power at the breaker, verify the replacement color/rating matches, and confirm secure mounting.