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Just had a call from my sister. Her combi boiler would not work this morning. She got some local plumber in and he diagnosed water having got in via the flue shorting out the flame sense electrode. (there was torential rain yesterday in London). He found the flue was leaning up slightly so after...

Worcester 14/19 CBi heat exchanger melting, boiler 6 months old! On the CBI it has 2 stainless steel heat exchanger baffles with "fingers" that glow red hot right next to the cast iron HE fins. A groove has developed on the HE fins by the lower set of baffle fingers. On some fins the...