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The Goodman 0130F00038 is a genuine OEM auxiliary high-limit switch, identified by its light blue body color-code, for the WFD195045S3BAB gas furnace. This thermal safety switch monitors temperature in its section of the furnace and opens the control circuit if it detects an overheat condition — protecting the heat exchanger and cabinet from damage caused by restricted airflow, a failed blower, or a dirty filter. A limit switch that has tripped permanently or lost calibration will prevent the furnace from firing, so an exact-match replacement is essential for safe operation.
The color-coded OEM 0130F00038 is calibrated to the precise trip and auto-reset temperatures Goodman specifies for this furnace. Because this is a safety device, the light-blue temperature rating must match exactly — an incorrect generic switch can nuisance-trip or, worse, fail to protect the equipment. Always match the OEM part number and color.
Easy (1/5) — Two mounting screws and two spade terminals, typically under 15 minutes. Cut power and gas first. If the switch keeps tripping after replacement, investigate airflow (filter, blower, ducting) rather than bypassing the safety.