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Mend Alpha CB28 Combi Boiler Central Heating Diverter Valve

hot water but no central heating on cb28 alpha combi?

checked micro switch and removed and cleaned diverter value, boiler runs on heat and water.and stops on boiler stat but no heat to rads, pump runs ok. could someone explain how the three port valve works and suggest a solution for the problem thanks.

pete
September 2009
AlphaAlpha CB28Heating, Home Heating SystemsCombi Boiler Central Heating Diverter Valve

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