Combi boiler hot water problem

gondunit

Hi there - my local water company has just upgraded our water pipes which seems to have increased the flow of water through all the taps quite a lot. But now the hot taps need to be on full blast before the combi-boiler kicks in. I was wondering if anyone knows whats causing the problem, and if it's fairly simple to fix?

Thanks for you help.

PS: I've seen this post on a thread a few months back, which seems to be a similar problem, but i couldn't find any responses, so i am creating a new thread.

Quote:
Originally Posted by bobdriver1
Hi
I have a biasi combi boiler 24S and the central heating part works fine but the hotwater diaphram switch takes about 20 seconds to come on and it only works when the hot tap full on it doe not work at all if the tap is only half on. Is this the diverter valve or the diaphram switch, can anyone help. Thanks in advance:mad: