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thanks for the replies... have not tested it yet but I have turned the temperature control on the water cylinder down to zero as looking at some schematics it suggests that the water heating needs both the controller and the water cylinder to call for heat so now even if the controller is...

Hi my potterton boiler has gone a bit potty, it is eleven years old and has started to turn the boiler on to heat the water even when the slider is in the off position on the ep2002 controller. It will heat the water and then turn off once it is hot. As I have an electric shower I do not want...