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vaillant heater?

why does my water only run hot when central heating on, won't come on otherwise

sue
March 2006
VaillantHeating, Home Heating SystemsVaillant Heater Water Hot Heating
your boiler need to be looked at by heating enginer, not a lot you can do your self....

ASGHAR NABI
March 2006

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how do I rectify the fault as detailed below?

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