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The Goodman 10123537 Manual Reset Limit Switch is a genuine OEM high-limit safety control engineered for the AMVC950704CXAB modulating variable-speed gas furnace and compatible Goodman/Amana models. This gray-bodied switch monitors heat-exchanger temperature and interrupts the gas valve and burner circuit if the furnace overheats, protecting the equipment and your home from unsafe operating conditions. Because it is a manual-reset design, it requires a physical button press to restore operation after a trip — a deliberate safety feature that flags a persistent airflow or overheating problem for inspection.
OEM vs. Generic: This genuine OEM switch is calibrated to the exact trip temperature specified by Goodman for your furnace's heat exchanger. Generic aftermarket limit switches may carry a similar amp rating but can differ in trip point and reset behavior, risking nuisance shutdowns or delayed protection. For a factory-matched safety control, the OEM part is the recommended choice.
Install difficulty: Easy–Moderate. Two-screw mount with quarter-inch spade terminals; typically a 15–20 minute job. Always shut off power and gas before servicing. A repeated trip usually signals a dirty filter, blocked airflow, or a cracked heat exchanger — have the root cause diagnosed by a licensed HVAC technician.