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The Goodman 10123533 is a genuine OEM manual-reset high-limit switch for AMVC951155DXAB variable-capacity gas furnaces and compatible Goodman/Amana AMVC95 models. This thermal safety control opens the ignition circuit if the furnace overheats — protecting the heat exchanger and blower from damage caused by restricted airflow, a failing blower, or a dirty filter. Its manual-reset design requires a deliberate button press to restore operation, prompting inspection before the furnace runs again.
Limit switches are calibrated to a specific trip temperature. The OEM 10123533 is factory-set to your furnace's exact spec, so it protects without nuisance tripping. Generic switches with the wrong setpoint can either trip prematurely or — worse — fail to trip, defeating a key safety function. Always use the OEM-rated part for safety controls.
Moderate (2/5). Disconnect power, unplug the two wire leads, remove the mounting screws, and install the replacement in the same orientation. If the original tripped, diagnose the airflow or blower cause before restoring service. A technician is recommended for first-time DIYers.