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The Goodman 0130F00038 is the genuine OEM auxiliary limit switch (identified by its light-blue housing) for the Amana/Goodman AMH80603AXBC gas furnace. This secondary safety control monitors temperature at the blower compartment or heat-exchanger area and interrupts the gas valve if a dangerous overtemperature condition occurs — backing up the primary limit. The light-blue color code identifies its specific factory trip temperature.
Auxiliary limits are color-coded to distinct trip temperatures — installing the wrong set point defeats the safety function. The OEM 0130F00038 guarantees the correct light-blue calibration, mounting, and terminal layout. Never substitute a differently rated disc on a safety circuit.
Easy. Two screws and two push-on terminals. Disconnect power before servicing. If this limit tripped, investigate airflow restrictions or blower issues before restoring operation so the fault does not recur.