if the taps where of u wouldnt get water out the taps or any water out the hot taps a combi boiler woks like this when u have the heating on it works and when u open a hot water point ie tap or shower the hot water function works stoping the heating and if u have the heating of as soon as u open a hot water point the automatically comes on if its working fine best to leave it alone.
kash
September 2010
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