For the last few weeks I noticed that my central heating and hot water was staying on even though my programmer was saying it was off. I checked everything and the only way to turn the boiler off was at the mains! The programmer in question was a Potterton EP2002 and was approx 12 years old. Upon reading some comments on this site I took the advice and purchased a new EP2 programmer. It was very simple to install but I am still having the same issue! Any ideas, greatly welcome?