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The Goodman 10123517 is a genuine OEM manual-reset high-limit switch for the ACVC950915DXAB gas furnace. This safety control opens the circuit if the furnace overheats — protecting the heat exchanger and your home from dangerous high-temperature conditions. Because it is a manual-reset device, it must be pressed to reset after a trip, alerting you to investigate the root cause (often a dirty filter or blocked airflow).
The OEM 10123517 carries the precise trip temperature rating specified for this furnace. Generic limit switches with a mismatched temperature rating can trip prematurely or — worse — fail to trip when needed, defeating the safety function. For overheat protection, always use the OEM-rated switch.
Easy (2/5) — Disconnect power, remove the two electrical leads and mounting screws, install the new switch, and reconnect. About 15 minutes. Shut off gas and power first.