Searching for how do I reset a Chromecast? In some cases, when your Chromecast is not responsive (i.e., not visible in the Google Home app or not connected to Wi-Fi), this is likely the method by which you will have to use the hard reset method. Unplug and re-plug the Chromecast into the power source, press and hold the reset button, and wait until the LED starts blinking. This causes a factory reset that wipes any configuration that is preventing normal use. Once done, you will have to reconnect Chromecast to your Wi-Fi in the Google Home app and follow the standard setup procedure once again.