What indicates that the electric griddle is ready for use?

The indicator that an electric griddle is ready for use is when the heating indicator light goes off. This light serves as a signal that the griddle has reached the set temperature. When the light is illuminated, it indicates that the heating elements are active and the temperature is still rising. Once the griddle reaches the desired heat level, the light will turn off, meaning it is ready for cooking.

The other options do not serve as reliable indicators of readiness. A splash guard lifting automatically, beeping sounds, or a warm plug do not relate directly to the operational status of the griddle in terms of cooking temperature. Thus, the heating indicator light provides the most accurate and immediate feedback on when it is safe and effective to begin cooking on the electric griddle.