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The Goodman 10123529 Manual Reset Limit Switch is a genuine OEM safety control engineered for the ACVM970804CNAA gas furnace and compatible Goodman/Amana models. This high-limit/rollout safety switch monitors furnace temperature and opens the circuit to shut down the burners if it senses an overheat or flame rollout condition, protecting the heat exchanger and your home.
This genuine Goodman OEM switch is calibrated to the exact trip temperature specified for your furnace, ensuring the burners shut down at the correct setpoint. Generic limit switches may carry a similar rating but can differ in trip accuracy and bracket geometry. Because this is a safety component, using the OEM-spec part is strongly recommended.
Moderate (2/5) — Requires basic hand tools. Disconnect power to the furnace, photograph the wiring, remove the two mounting screws and spade connectors, then install the new switch in the same orientation. If the switch keeps tripping after replacement, have the underlying overheat cause diagnosed by a qualified technician.