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? The flame on my app/thermostat is displayed indicating the heating is on, however my boiler isn’t on. Is this normal? (WH) What happens if my internet connection stops working? Support for BT routers on mesh networks (2.4 and 5 ghz) Have you changed your router or internet service provider? Comments 0 comments Please sign in to leave a comment.