We have a Halstead Finest Gold boiler. The central heating part of which works fine. However, recently the boiler has failed to fire when we turn on a hot water tap. However, if we turn all three hotwater taps on the system, the boiler fires up aftrer a few seconds

Any ideas what needs replacing and how much it should cost?

Toby, September 2009

Thanks very much!

toby, September 2009

dhw diaphram bout a fiver 2 buy

tim, September 2009