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The Goodman/Amana 0130F00038 Auxiliary Limit Switch (identified by its light-blue housing) is a genuine OEM secondary safety control for the AMES961205DNAA gas furnace. This thermal switch guards a specific zone of the furnace — such as the blower or burner compartment — and cuts power to the gas valve if it detects abnormal heat, protecting against rollout and overheating. Its light-blue color denotes its factory-set trip temperature, so matching the exact part is essential.
The OEM 0130F00038 is color-coded to its precise cut-out temperature. Installing a switch with the wrong trip point — even one that physically fits — defeats the safety function or causes nuisance shutdowns. For any temperature-coded safety limit, always use the genuine OEM part.
Easy — Two screws and quick-connect terminals. Disconnect power before servicing. If the original switch tripped, have a technician find and correct the overheating or flame-rollout cause before returning the unit to service.