If you're having trouble with the volume not working on Roku remote, there are a few things you can try to resolve the issue.
Check your battery, and replace it with a new... moreIf you're having trouble with the volume not working on Roku remote, there are a few things you can try to resolve the issue.
Check your battery, and replace it with a new battery.
Press the mute button for 3 seconds for a factory reset.
If both steps fail to reset the volume button then you can read this blog to know more about the Roku volume button not working.