although rads working ok, I do not have any hot water - it is very slightly warm or cold. do you know what the problem could be?
its like there is no demand for the hot water as the pilot doesn't fire up and the demand light doesn't come on if only the taps are put on, but the demand light and pilot is ok if using radiators?

Diane, February 2008

Diverter valve requires replacement

Richard Hall, February 2008