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The Goodman 10123529 Manual Reset Limit Switch is a genuine OEM safety control for AMVC801005CXAA and compatible Goodman/Amana gas furnaces. This high-limit switch monitors temperature and interrupts the gas valve if the furnace overheats, protecting the heat exchanger and your home from unsafe operating conditions.
Unlike auto-reset limits, a manual reset switch stays open until you press the reset button — a deliberate design that flags a recurring overheat problem (such as a blocked filter, failing blower, or restricted ducting) so it can be corrected rather than repeatedly ignored.
This genuine OEM switch is calibrated to the exact trip temperature specified for your furnace. Generic limit switches with the wrong set point can trip too early (nuisance shutdowns) or too late (safety risk). For a safety-critical control, always match OEM specs.
Easy. Typically a 10–15 minute job: cut power, unplug the two spade terminals, remove the mounting screws, and install the new switch in the same orientation. If the old switch tripped, diagnose the underlying overheat cause before returning the furnace to service.