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Ravensheat RFF 820/20.DOMESTIC HOT WATER ONLY WORKS WHEN HEATING IS ON?

My combi boiler only supplies hot water to the taps when the Radiator system is switched on.
Anyone any ideas what could be wrong.
Cheers
Alan

albar
November 2006

Is the diaphragm the one in the three way valve

albar
November 2006

Thanks very much Mike.
Albar

albar
November 2006

you need a new diaphragm.

BG MIKE
November 2006

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