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The Goodman 10123529 is a genuine OEM manual-reset limit switch built for the AMVC80604BNAA variable-speed gas furnace. This safety-critical device opens the gas circuit if it senses flame rollout or excessive burner-box temperature, and requires a deliberate manual reset — a design that forces a service inspection before the furnace can run again. If your furnace locks out on a rollout fault or the button won't hold, this switch is the correct replacement.
OEM switches are factory-calibrated to the exact trip temperature this furnace requires. Generic aftermarket limits may trip early (nuisance shutdowns) or late (a genuine safety hazard). On a life-safety rollout control, we strongly recommend OEM.
Difficulty: Easy (2/5). Disconnect power, note wire positions, remove the two mounting screws, transfer the spade connectors, and mount the new switch flush against the burner box. Reset the button before firing. Typical time: 10–15 minutes.