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The Goodman 0130F00038 Auxiliary Limit Switch (Light Blue) is a genuine OEM secondary thermal safety control for the AMEC960803BNAA gas furnace and compatible Goodman/Amana models. This normally-closed switch backs up the primary limit, opening the control circuit if a specific zone — such as the blower compartment or burner area — exceeds its safe temperature. The light-blue body identifies its factory-calibrated trip point; using the correct color-coded switch is essential because Goodman uses several set points across the same furnace.
OEM vs. Generic: The OEM 0130F00038 matches Goodman's exact trip temperature, terminal layout, and mounting. Substituting a switch with the wrong color/set point can cause nuisance shutdowns or bypass a needed safety margin. Because this is a safety device, always match the light-blue OEM part rather than guessing at a universal limit.
Install difficulty: Easy (2/5). Disconnect furnace power, photograph the wiring, remove the mounting screws, transfer the spade connectors to the new switch, and re-secure in the same position. Basic hand tools required; confirm normal operation after reassembly.