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Mend Ravensheat RFF 820/20 Combi Boiler Heating System Issue

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
RavensheatRavensheat RFF 820/20Heating, Home Heating SystemsCombi Boiler Heating System Boiler Issue
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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Free repair help for Ravensheat RFF 820/20 home heating systems