No hot water for shower!!!!

[Tango1967]

We have a gas boiler for CH & hot water. Recently, no hot water comes in the shower upstairs even when the hot water tap is on full! But the hot water in the kitchen downstairs works fine!!! We can only use the shower now if we turn on the central heating! Any ideas?????

[makemesmile]

I'd get an engineer to check it out - it might be the pump - but that is just a guess : )