While you wait for answers, we may have found some information which could help you.
Click here for Central Heating Hot Water Boiler
volkera compact 29 he green light flashing?
How to re pressurise a volkera boiler ?
lossing water 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?