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Vokera boiler heats hot water tap , but keeps going cold but rads work ?

Vokera boiler heats hot water tap , but keeps going cold but rads work ? If I run a bath it only heats the hot water for a short time, then the water runs cold ? is it the thermostat ?

Vokera combi boiler Excell 80 sp
Tony G, November 2008
Or a faulty mother board...

Our Linea was like that until a new board was put in for other reasons - it was better than when new.

Until today when we have hot radiators but no hot water!!!

Andrew, November 2008
Google 'flue venturi vokera cycling' Classic symptom of a dirty venturi on this model.

c, November 2008
Sounds like gas valve, you need to consult a corgi registered gas installer sorry expensive !

allan, November 2008
link Click here to see other fixes for Vokera.