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The Goodman 0130F00038 Auxiliary Limit Switch (light blue) is a genuine OEM safety control designed for the ADSH800403AXAC gas furnace and compatible Goodman/Amana models. This normally-closed thermal limit opens the control circuit if it senses abnormal heat, shutting the burner down to protect the heat exchanger and surrounding components from overheating.
This is a factory OEM switch calibrated to the exact trip temperature Goodman specifies for this platform. Aftermarket generics may trip early (nuisance shutdowns) or late (safety risk). For a code-critical safety control, the OEM part is the recommended choice.
Easy (2/5). A two-wire swap — disconnect power, pull the spade terminals, unscrew the old switch, and mount the replacement in the same orientation. Basic hand tools and 10–15 minutes for most homeowners; always cut power at the breaker first.