I have an ancient rayburn that I use to cook and that also heats the hot water. I recently had the rayburn serviced and since then it works on temp 1 - however the hot water has started to boil in the boiler. The plumber said that I need to run off hot water and that I can't have a radiator fitted as the boiler does not have a coil (?) and it would not be worth doing until the boiler needs changing. What can I do other than turn off the rayburn?????? Help gratefully received.