the filling on this combi is by using the same isolation valve as the cold water inlet isolation so i would guess u haven't opened the cold inlet correctly under the boiler
sorry ...read that back and it didnt sound to clear.!
if your boiler has an internal filling system ( as apposed to a filling loop added at installation) u have probably turned it the wrong way after filling your central heating. this isolates the cold feed to the combi..hence no hot water comes out of the taps!! thanks
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