I have a Vokera Syntesi e boiler it keeps losing pressure but there are no leaks. When on DHW only setting temp. can reach over 85c. I've been told the heat exchanger is blocked and the boiler (which is only 3 years old is scrap) is there anything I can do to fix?

Stan the man, January 2009

are you saying the main heat exchager or the small plate exchager is blocked.
usually if there are "no leaks" its got no pressure in the expansion vessel .....

Fillippo (heating engineer), January 2009