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Genuine OEM Goodman/Amana 0130F00038 Auxiliary Limit Switch (light blue) for the AMVC81155CXAA gas furnace. This normally-closed thermal safety switch opens if it detects abnormal heat — protecting the furnace from overheating caused by restricted airflow, a failed blower, or a dirty filter. When it trips, the furnace shuts down the gas valve to prevent damage and fire risk.
The light-blue color code corresponds to a specific trip temperature. Installing the wrong-rated generic switch can cause nuisance trips or, worse, fail to protect the unit. This OEM switch guarantees the exact factory trip point for the AMVC81155CXAA.
Rated 2/5. Cut power at the breaker, note the wire positions, remove the two mounting screws, transfer the spade connectors, and reinstall. Takes about 10–15 minutes. If the new switch also trips, diagnose the underlying airflow problem — the switch is doing its job.
A repeatedly tripping limit switch signals an airflow or heat-exchanger issue. Always disconnect power before servicing.