Raumthermostat Smarte Features Follow Related articles Post Office routers Can I use re-chargeable batteries in my Wiser Radiator Thermostats and Wiser Room Thermostats? The flame on my app/thermostat is displayed indicating the heating is on, however my boiler isn’t on. Is this normal? (WH) How do I fully close the Wiser Radiator Thermostat so that I can drain down the radiator to take it off the wall without draining the whole system? How to factory reset a Wiser room thermostat Comments 0 comments Please sign in to leave a comment.