Worcester 24 cdi no hot water?

When the central heating is on hot water is ok. When heating off the boiler fires up when a hot tap turned on, but no hot water available. There is no flashing warning lights every thing seems normal apart from no hot water !
Richard, April 2006


done
sorry could also be plate heat exchanger clogged up

paul, April 2006
diaphragm on diverter as gone

paul, April 2006
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