During the cold spell, when the heating was on, i realised that I did not need to turn on the hot water - very bizarre. The hot water always seems too hot aswell. I have had thermostat on tank changed and turned it down but its made no difference. The house is a new build and we know the plumbers were thrown off site for being rubbish (no offence). Now I am worried that there is basic mistakes with my hot water system.. the boiler is a potterton promax he. Please help as Im getting worried about the kids scalding themselves. Thanks