We may have found other answers which could help you.
Click here for Boiler Heating Kettling
lossing water pressure ?
my volkera linea 24 boiler keeps losing pressure?
Volkera compact 29A Combi always making kettling noise?
volkera linea 28 no hot water?
How can I turn my Volkera excell 80sp on again?
Volkera minute e20 will not ignite?