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Genuine Goodman red-button manual-reset limit switch for the AMVC950453BXAD gas furnace. The red cap identifies this as the higher-temperature rollout/limit safety in the burner assembly. It opens the ignition circuit when it senses flame rollout or excessive heat — conditions typically caused by a cracked heat exchanger, blocked flue, or poor combustion airflow. A tripped rollout switch is a signal to inspect the combustion system before returning the furnace to service.
The OEM red switch carries the exact trip temperature Goodman specifies for this position in the burner box. Substituting a generic switch with a different setpoint compromises a life-safety function. Always replace with the matching OEM rating and color-coded part.
Easy (2/5) — Two screws and two push-on terminals. Cut power at the disconnect, photograph wiring and placement, then swap. About 15 minutes. If this switch tripped, have the heat exchanger and venting professionally inspected.