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The system is 20 years old comprising pressurised DHW tank in airing cupboard, gas boiler in garage and recently replaced zone valve to the hot water tank. The CH controls are firing the boiler OK but the hot water controls are not. I have read the Wiki and FAQs and it seems likely that the...

…that is the question. I've just refitted the family bathroom of our 19-year old Bovis house in the hard water area of Hertfordshire. The wife wanted a nice shiny chrome heated towel rail instead of the radiator. We got a cheap and cheerful Kudox one from B&Q which is now repositioned on...

A few days ago we noticed the hot water was getting really hot. Then we noticed that despite turning the room stat down the radiators were belting out the heat regardless. Then we realised that neither the timer nor the room stat were having any effect. With the timer automatically or...