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My Vaillant VCW combi-boiler doesn't provide hot water for bath?

Although all the controls are turned to maximum my Vaillant VCW GB 242 EH combi-boiler doesn't provide hot water for a bath. The CH system is working fine though. Boiler has been fully serviced recently. Could it be the heat exchanger? Any suggestions?

Alex Ewing
March 2008
VaillantHeating, Home Heating SystemsProvide Hot Water
more like the diverter valve not changing position to give hot water

wirecutterman
March 2008

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