The settings on the boiler, wall mounted in the kitchen have not been changed since it was installed two years ago - when the house was built. Since then we have noticed that the boiler "fires up" even when there is no water being drawn. Also, the temperature in the shower (mixer tap) fluctuates from freezing to boiling. Same in the upstairs bathroom where the hot tap runs hot then cold. No problems at all with the heating. Any advice re the fluctuation of temperature would be greatly appreciated.
Karen
Karen