Open the PBS app on your Roku device. Scroll down the menu options on the left side and select Profile.
Within the Profile menu, select Change Station.
A box will appear on the left side of the screen with a number pad for you to type in your ZIP code. Stations nearby will appear on the right side to select from.
Using your remote, select a default station from the right list, or enter the zip code of the new station. If you enter a new ZIP code the options on the right side will change to fit the ZIP code you have entered.
Select OK on your Roku remote.
A list of available options appears on the right. Scroll over and select the station you want.
The PBS app will refresh and the new station will be reflected along the top of the screen of the PBS app.