here is a question for you.
my central heating has broken down. a few corgi regsitered people i know have looked at it informally and donut have a clue. i suspect the probelm may be it is full of sludge- it is about 17 years old, never been drained down but the boiler was replaced about 5...
Boiler - 6 year old glow worm micron fitted after previous condensing bolier expired after about 8yrs. About 5 years ago a new Y valve was fitted. Had it rewired about 2 yrs ago.
I have had a couple of people who fit/fix central heating be unable to offer a solution or tell what is wrong...