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The Goodman 0130F00038 is a genuine OEM auxiliary limit switch (light blue) for the Amana/Goodman AMES800804CXAA gas furnace. This secondary thermal safety device supplements the primary limit, opening the control circuit if it detects abnormal heat — such as flame rollout or a blocked-airflow overheat condition — to shut the furnace down before damage or a hazard occurs.
The light-blue color code identifies this switch's specific trip temperature — installing the wrong rating defeats its safety purpose. Genuine OEM guarantees the correct set point and terminal layout. Because this is a safety-critical component, we do not recommend generic substitutes.
Easy (1/5). Shut off power at the breaker, remove the two mounting screws, transfer the wire leads to the new switch, and remount. A quick 10–15 minute repair with a nut driver.