Which condition might indicate an over temperature failure?

An over temperature failure often manifests as an abnormal condition that indicates the system is reaching unsafe operating temperatures. The activation of a warning light serves as an early alert that something is wrong, potentially signaling overheating conditions. Warning lights are designed to draw immediate attention to critical issues, including temperature extremes, allowing for timely intervention before damage occurs.

The other conditions presented could relate to various electrical or operational issues, but they do not specifically point to temperature-related failures. For instance, a sudden drop in voltage might indicate a different issue like a short circuit or load problem, immediate system shutdown could result from various failure conditions, and a signal from the ground fault monitor typically indicates grounding issues rather than temperature concerns. Thus, the activation of a warning light is a direct indication of an over temperature situation that requires immediate attention.