Hi there, i have a Bosch worcester 28i boiler. We can not get hot water unless the heating is on? About 6 months ago the gas board did some work on the pipes outside the house, not for us generally, The problem seemed to start when they had finished the work, I though it may be because of a drop in gas pressure but they say that this would not effect the boiler. Whenever we turn on a hot water tap, the red light flashes at the front of the boiler, so we have to press that and then put the heating on to get hot water. Even than most times when the heating is on, and you turn on a hot water tap, the light flashes again, so we have to go through the whole process again. I am not a plumber or a heating engineer BTW, Can someone help please
Thank you
Thank you