My Potterton Boiler controlled by a ep2000 controller does not appear to be shutting down properly! After switching the controls to off, the thermostat to zero, the radiators are remaining hot!! Please can someone help.

Mrs Tracy Chisholm, November 2009

There's a motorised valve that decides where the heated water should go - Radiators or Hot Water Tank - or both at the same time - Diverter Valve. Sometimes they get stuck in the wrong position and strange things happen.

Here's a picture of one... it has a manual override lever...

http://www.toolstation.com/images/library/stock/webbig/60151.jpg

You may need a specialist to attend to your valve... Avoid British Gas if you want to hang on to your money.

Good luck...

Peccavi, November 2009