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You are a complete star. :wink: I tried the mixer shower and thought you might be right because although i was only getting luke warm water out of it, the hot pipe into the shower was plenty hot. So i left the shower running and turned on the hot tap in the sink. The hot pipe to the shower...

Wooooahhhh! I never expected that many replies. Thanks everyone for your help. I also thought the 18 degrees for the cold water feed sounded high so i wondered whether the temperature sensor is naff. There was one thing i forgot to mention, that according to the temperature meter, i was...

Right then. I have checked the temperatures while i was drawing DHW at about 6 litres a minute, and they are as follows: (NB. SHE is secondary heat echanger, not my wife) Output from primary heat exchanger (i.e. before going into SHE): 60 deg Input to primary heat exchanger (i.e. after...

Firstly, you're not really in Cuba are you (or how would you know about our cold weather? BBC world service?) I had thought about the colder mains water and yes, i think that may well be a part of it. I will be borrowing my brother's temperature probe tomorrow so i will post the relevant...

I have the manual for this boiler. I have followed the flow chart, but my problem doesn't lie clearly within any of the faults in the flow chart. I have thought it through methodically. There is nothing wrong with the primary heating circuit as the CH works fine. There is nothing wrong...

I have a Chaffoteaux et Maury Britony Combi 80 and the CH part works fine. Over the years the DHW has got cooler and cooler (i have noticed this because i have had to gradually turn the thermostatic mixer shower up to near maximum over time.) I imagine this has something to do with the...