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The Goodman 0130F00038 is the genuine OEM auxiliary limit switch (light blue) for the WFM18045S3AXCC furnace and compatible Goodman/Amana models. This secondary safety control provides supplemental overheat and rollout protection, cutting power to the gas valve if abnormal temperatures are detected outside the primary limit's zone. The light-blue color code marks its specific trip temperature.
As a calibrated safety device, the light-blue OEM switch trips at the exact factory-specified temperature. Substituting a generic or mismatched-color switch can defeat critical overheat protection. Always replace with the matching OEM part number and color code.
Easy — Two screws and two spade connectors. Shut off power before servicing; confirm correct mounting location for the auxiliary limit.