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The Goodman 10123529 Manual Reset Limit Switch is a genuine OEM safety control engineered for the Amana/Goodman AMVC81005CNCA variable-speed gas furnace. This high-limit switch monitors heat-exchanger and burner-area temperature and trips the gas valve if the furnace overheats, protecting your equipment and home from unsafe operation. Because it is a manual reset device, it will not auto-restore after a fault—an intentional design that forces a technician to inspect for the root cause (blocked flue, failed blower, or restricted airflow) before the furnace can fire again.
This is the exact factory-spec part with the correct trip temperature and terminal spacing. Generic aftermarket switches often trip at incorrect setpoints, causing nuisance shutdowns or, worse, failing to protect the unit. Choose OEM for guaranteed fit and calibrated safety performance.
Easy — Typically a two-wire disconnect, one or two mounting screws, and reconnect. Always shut off gas and power before servicing. Most homeowners complete this in 15–20 minutes; when in doubt, use a licensed HVAC technician.