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The Goodman 0130F00038 Auxiliary Limit Switch (light blue) is a genuine OEM safety component engineered for the AMH80604BXBB gas furnace and compatible Goodman/Amana models. This normally-closed thermal limit interrupts the gas valve and ignition circuit if the furnace overheats or airflow is lost, protecting the heat exchanger from thermal damage and preventing unsafe operation.
Our genuine OEM 0130F00038 guarantees the correct factory trip temperature and mounting geometry — critical for a safety device. Aftermarket switches often ship with the wrong trip point, which can cause nuisance shutdowns or, worse, fail to protect the heat exchanger. For a safety-rated component, we recommend OEM.
Easy (1/5) — Two spade terminals and one or two mounting screws. Cut power at the breaker, note wire positions, swap, and restore. Typically a 10-minute job for a homeowner.