hot water works ok when the heating is on all the time but when i turn the switch over to the hot water only i get cold water i replaced differential pressure switch and i found no change.the boiler is 8 year old and had no problems with the system at all could any one please help me.

gordon macdonald, June 2005

when you said check the domestic valve do you me the diverter vale

gordon macdonald, June 2005

have you checked the domestic valve? it switches from the heating to the water on demand

ab, June 2005