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home Fix label Heating label_important Home Heating Systems category Vaillant

Hot water but no heating?

My boiler will heat the tap hot water but not the heating.
The fan is on all the time but goes off when I switch to hot water only.Why is the fan on constantly? Why won't the heating come on? The boiler is a Valiant.
Dave Barrs, January 2010
home Fix label Heating label_important Home Heating Systems category Vaillantdone
combi?

j, January 2010
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