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The Goodman 10123529 is a genuine OEM manual-reset high-limit safety switch for the AMVC80704BXAA gas furnace and compatible Goodman/Amana models. This normally-closed thermal switch opens the control circuit and shuts down the furnace if it senses an overtemperature or flame-rollout condition, protecting the heat exchanger and home from unsafe operation. Because it is a manual-reset device, a tripped switch must be physically reset — and repeated trips signal an airflow or combustion fault to investigate.
Aftermarket limit switches may carry a different trip temperature or mounting footprint, defeating the safety design. This genuine Goodman OEM switch is calibrated to the factory setpoint and bracket, so the furnace shuts down exactly when it should. On a safety control, always choose OEM.
Easy (2/5) — Cut power, unplug the two spade terminals, remove the mounting screws, and install the new switch. Basic tools, about 15 minutes. Diagnose the cause of any prior trip before returning to service.