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The Goodman 10123517 Manual Reset Limit Switch is a genuine OEM safety control for GCH950905DXAA gas furnaces. Unlike an auto-reset limit, this switch stays open after tripping and must be manually reset with its push button, ensuring a technician inspects the furnace after an overheat or flame-rollout event before it can fire again.
The OEM 10123517 carries the exact trip temperature and mounting footprint specified for the GCH950905DXAA. A frequently tripping manual-reset switch usually signals an underlying problem (blocked flue, dirty burners, or a cracked heat exchanger) — replace with the factory-spec part and diagnose the root cause rather than fitting a mismatched generic.
Easy (2/5). Two mounting screws and spade terminals. Cut power and gas first. If the new switch trips again after reset, do not bypass it — have the heat exchanger and venting inspected.