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The Goodman 10123529 Manual Reset Limit Switch is a genuine OEM safety control for Goodman/Amana AMVC80603BXCA furnaces. This high-limit / flame-rollout switch monitors for dangerous overheating and opens the circuit to shut down the burners if temperatures exceed the safe threshold. Because it is a manual reset device, it stays tripped until you press the reset button — a deliberate design that flags a real problem (blocked airflow, restricted venting, or a cracked heat exchanger) rather than silently self-clearing.
This is a life-safety component. The OEM Goodman switch is calibrated to the exact trip temperature specified for your furnace and uses factory terminal spacing for a secure connection. Generic substitutes with the wrong set point can either nuisance-trip or fail to trip when needed — a serious safety risk. Always match OEM for limit controls.
Easy (2/5). Turn off power, disconnect the two spade terminals, unscrew the switch, and install the replacement. Takes about 15 minutes with a nut driver. After installation, investigate why the original tripped before returning the furnace to service.