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The Goodman 0130F00038 is a genuine OEM auxiliary limit switch, identified by its light blue housing, designed as an exact-fit replacement for the AMEC961005CNAC gas furnace and compatible Amana and Goodman models. This secondary safety control supplements the primary limit by monitoring temperature in a specific zone of the furnace — often the blower compartment — and interrupting the control circuit if it overheats, adding an extra layer of protection against airflow faults.
Goodman color-codes these auxiliary limits by trip temperature, and the light-blue 0130F00038 is matched to this furnace's requirement. Substituting a switch with a different rating — even one that looks similar — can defeat the intended protection or cause nuisance trips. Choose the OEM part to guarantee the correct set point.
Easy. Power down the furnace, unplug the wire terminals, remove the mounting screws, and install the replacement in the same location and orientation. Confirm normal operation after reassembly. If the switch trips repeatedly, investigate blower and airflow issues before replacing again.