We may have found other answers which could help you.
Click here for Boiler Fault VolkeraHow to re pressurise a volkera boiler ?
Volkera compact 29A Combi always making kettling noise?
lossing water pressure ?
My Volkera 29a boiler has stopped firin up?
Why does our boiler light up when "off"?
volkera linea 28 no hot water?