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repair of ravenheat 820/20 fan assisted combi-boiler?

central heating is working but no dhw.lot of banging and popping recently before failure.replaced diverter valve about 6 years ago because heat was transferring into rad.

dave walker
October 2008
RavenheatHeating, Home Heating SystemsCentral Heating Working
Cheers Kenny.I know its not legal but am an old plumber who was gas fitting before corgi was a pup.Would never work on anyone elses for above reasons. But this being my own. I appreciate your advice.No hot water at all as pilot not igniting on water flow but working fine on CH

Dave Walker
October 2008
Dave
Firstly it is illegal for you to work on a gas appliance without a Corgi Cert so call in a Corgi.
Sounds like a blocked heat exchanger, I assume that this is on the hot water to the tap you get the banging and if so its probably scale. I am pretty sure the water aint getting through fast enough and is boiling off locally. Need to get a man who can mate sorry

Kenny F
October 2008

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