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The genuine OEM Goodman 0130F00038 is a color-coded (light blue) auxiliary limit switch for the Goodman/Amana ADVC80805CNBA furnace. As a secondary thermal safety, the auxiliary limit monitors a specific zone of the furnace — commonly the blower or return-air compartment — and opens the circuit if temperatures rise beyond its rated set point, providing overheat protection independent of the primary high-limit.
The OEM Goodman auxiliary switch is calibrated to the trip temperature this furnace requires, with the light blue code confirming the correct rating. Substituting a switch with the wrong temperature band undermines the layered safety design. Always match the color code to guarantee proper protection.
Easy (1/5). Single- or double-screw mount with spade connectors; roughly a 10–15 minute replacement with power off. Verify the light blue color code matches before installing.