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halstead finest gold?

when i run domestic hot water, radiators start to get warm. what would cause this and how easy to fix.
Terry, August 2009
Your boiler needs a new diverter valve service kit and while you're at it fit a new hot water diaphragm. About £50 worth of parts and a couple of hours for a plumber to fit.

Bored Plumber, August 2009
link Click here to see other fixes for Halstead.