Many thanks Gasguru for your reply.
I've read carefully your points, particularly the 1st point and believe I understand and next time I fully drain the system - which will be soon as I would like to deal will all these niggly issues, and perhaps not so niggly issues properly in the near...
Hello - not sure if this appropriate - multiple questions/issues in one post however this is my 1st post so here goes - and apologies for anything which is not clear or sounds stupid;
Make/model - Alpha 240E combi
1) Over the weekend I drained the CH, added cleaner, re-pressurised and left...