(Disclosure, I may receive a small referral fee when you make a purchase through links on this post.)
As we have all ordered the wrong item from Amazon at times, you may also wanted to switch the WiFi network on your Chromecast. Unfortunately, there is no easy way to change this once the Chromecast is set up. The only way to change your WiFi network on your Chromecast is to perform a factory reset. There are two ways to perform a factory reset on your Chromecast.
First – go to your Chromecast app and allow your app to discover your Chromecast. Remember, your TV needs to be on and input set to the HDMI your Chromecast is connected to.
Scroll down and you will find ‘Factory Reset’ button.
Once you click Factory reset, click continue and you are done! Perform setup on your new WiFi and you are good to go.
The 2nd way to do a factory reset is by holding the power button of your Chromecast for 25 seconds until the solid light starts flashing.