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The Goodman 0130F00035 Primary Limit Switch (purple) is a genuine OEM high-temperature safety limit for the AMH80453AXCB gas furnace and related Goodman/Amana models. Mounted on the heat exchanger housing, this normally-closed switch opens the circuit and shuts off the burners if plenum temperature exceeds its factory trip point — protecting against overheating from restricted airflow, a dirty filter, or blower failure. A failed limit causes no-heat, short cycling, or a furnace that won't fire at all.
The OEM 0130F00035 is factory-calibrated to the furnace's exact trip temperature — critical for a safety device. The purple color code identifies its specific setpoint. Generic limits with the wrong rating can nuisance-trip or, worse, fail to protect the heat exchanger. Always use the OEM-spec limit switch.
Easy (1/5) — Cut power, remove two mounting screws, transfer the two spade connectors, and reinstall. Verify airflow issues are resolved so the new switch isn't tripping on a real fault.