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Mend Olympic 20/30B Heating Boiler Hot Water

olmpic 20/30b boiler?

Does it have a 3way valve built into the boiler?
Heating works fine but when ask for hot water on its own boiler fires up but goes off after a minute or so.

Andy
September 2010
OlympicOlympic 20/30BHeating, Home Heating SystemsHeating Boiler Hot Water

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Olympic 20/30B Boiler - Hot Water Issue