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The Goodman 10123529 Manual Reset Limit Switch is a genuine OEM safety high-limit control for AMH80604BNBD gas furnaces and related Goodman/Amana models. This normally-closed switch opens to shut off the burners if it senses excessive temperature or flame rollout, protecting the heat exchanger and your home. Because it is a manual reset device, a tripped switch signals a real problem — check airflow, filters, and the heat exchanger before resetting.
This OEM Goodman switch is calibrated to the exact factory trip temperature for your furnace. Generic limit switches may trip at the wrong setpoint, causing nuisance shutdowns or — worse — failing to protect the heat exchanger. On a safety-critical control, OEM is strongly recommended.
Easy (1/5). Power off the furnace, disconnect the two wire leads, remove the mounting screws, and install the replacement in the same orientation. Typically 10–15 minutes with a nut driver. After install, restore power and confirm normal heating operation.