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The Goodman 0130F00038 Auxiliary Limit Switch (light blue) is a genuine OEM thermal safety control for the AMVC801005CNAB furnace and compatible Goodman/Amana models. This normally-closed limit opens the control circuit if temperatures in its monitored zone exceed the safe threshold, shutting down the burners to prevent overheating and heat-exchanger damage.
Limit switches are color-coded to a specific trip temperature. The OEM 0130F00038 guarantees the exact set point Goodman engineered for this furnace. Substituting a different-rated switch can allow unsafe overheating or cause nuisance shutdowns — always match the OEM part for safety controls.
Easy to Moderate. Disconnect power, remove the two mounting screws and spade terminals, and install the replacement in the same orientation. Simple mechanically, but because it is a safety device, verification by an HVAC technician is recommended.