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Radiators go cold when hot water tap on?

Radiators go cold when hot water tap on.On my 24si II Worcester boiler.
paul, March 2008
Hi, the 24si is a combi boiler and as with all combi boilers it is hot water priority, ie if you run the hot tap for a long time the heating will cool down,

gary.wright53@googlemail.com, March 2008
link Click here to see other fixes for Worcester.