Do I need broadband? Follow Yes. You will need broadband in your property to use Wiser. Related articles What happens if I lose my internet connection? What happens if my internet connection stops working? The flame on my app/thermostat is displayed indicating the heating is on, however my boiler isn’t on. Is this normal? (WH) Support for BT routers on mesh networks (2.4 and 5 ghz) Why is my 4G router not connecting to Wiser? Comments 0 comments Please sign in to leave a comment.