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combi boiler wont heat water?

boiler heats radiators but wont heat the water on its own.i have to have heating on at the same time to get hot water.

Mark
March 2012
Heating, Home Heating SystemsCombi Heating Radiators
What make boiler,faulty diverter valve,modern boiler has motor to open close just change motor, push fit

ltd
March 2012

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Combi Boiler No Hot Water - Fixes & Causes