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Hi, had local plumber have a look who diagnosed diaphragm issue and replaced (£200 inc labour). This seemed to resolve only for a short time but then started to kick in on it's own again, also developed leaks after fitting!! called back out twice and after attempts to 'tweak' leaking joints...

Hi Ken, Still haven't sorted it, just been turning it off in between using it for running baths! Do have a plumber coming to look @ within the next week or so. I'll let you know what the outcome is. Pete

Hi, Sorry to bother you, but I found your post ref your combi boiler from 2007 where you were getting your heating coming on when you wanted hot water. We're experiencing the same symptoms with our A23 MFFI now am are wondering what your problem was in the end and how much it cost to fix? Also...

Hi, Sorry to bother you, but I found your post ref your combi boiler from 2007 where you were getting your heating coming on when you wanted hot water. We're experiencing the same symptoms with our A23 MFFI now am are wondering what your problem was in the end and how much it cost to fix? Also...

I've got an A23 MFFI eurocombi which I believe is about 8 years old. It's been pretty good up till now but has developed a fault where if you draw hot water from the tap it will sometimes not be very hot and you'll find the radiators getting hot and then the boiler will carry on after you turn...