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The Goodman 10123517 is a genuine OEM manual-reset limit (rollout) switch for the WFD195070S3BAB gas furnace and compatible Goodman/Amana models. This safety device opens the ignition circuit if it detects abnormal heat — typically from flame rollout or a blocked heat exchanger — and must be manually reset once the fault is corrected. A tripped or failed switch will prevent the furnace from firing until replaced.
Because this is a life-safety component, the OEM 10123517 is strongly preferred — it is calibrated to the furnace's exact trip temperature and mounting position. Generic switches may carry a different set point, which can mask a real problem or cause nuisance trips. For safety devices, always fit OEM.
Easy (2/5). Disconnect power, unplug the two leads, remove the mounting screws, and install the replacement. Roughly 15 minutes. Important: a repeatedly tripping rollout switch signals a serious combustion or venting fault — have a licensed technician diagnose the root cause before returning the furnace to service.