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Vaillant boiler ,No hot water :(?

vaillant boiler that i can get heating from no probs but cant get any hot water at all ,only comes out cold wether heating on or not. any help please???
wyal5, January 2008
sounds like your diverter valve is faulty'.

paul, March 2008
combi- could be diverter valve

dodge, January 2008
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