Firstly just to let you know I have a Worcester Bosch 240 combi boiler.
Recently I have been experiencing reduced hot water temperature and also
noticed that the radiators were getting warm when I used the hot water, even
if the heating was off. I put this down to the diverter valve in the boiler
and promptly replaced it. However this did not solve it. So as a test I
shut off the central heating flow pipe then ran the hot water, and hey the
water was at full temperature again.
I am at a loss as to what I am missing here, any ideas would be much
Thanks in advance.