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The Goodman 0130F00038 Auxiliary Limit Switch (Light Blue) is a genuine OEM safety component for the Goodman/Amana ADVC81005CNAA gas furnace. This secondary (auxiliary) limit provides an additional layer of overheat protection — often located near the blower compartment or roll-out area — and opens the control circuit to stop the burners if temperatures exceed safe limits. The light-blue color code designates its specific trip temperature.
Because this is a life-safety device, the trip rating must exactly match the furnace design. The genuine Goodman light-blue switch is factory-calibrated for the ADVC81005CNAA. Generic switches with mismatched ratings can trip prematurely or fail to protect against a genuine overheat condition.
Easy to Moderate. Mounts with screws and connects via spade terminals. Disconnect power first and confirm the replacement color/rating matches the original. Repeated trips warrant checking airflow and blower performance.