Thinking of Power flushing to clean the inside of the boiler cus I'm getting intervals of cold water when i open hot water...
How would I do this with vokera unica combi boiler? which is this one. http://cdn0.vokera.co.uk/wp-content/uploads/2009/04/unica-he-installation-and-servicing-manual.pdf
Also what would I need?
How would I do this with vokera unica combi boiler? which is this one. http://cdn0.vokera.co.uk/wp-content/uploads/2009/04/unica-he-installation-and-servicing-manual.pdf
Also what would I need?