Thanks for your input kevplumb, sorry I haven't responded sooner. I think it had a new set (three?) of temp sensors.
I guess I was hoping that a bell would ring somewhere in someone's mind, and they would recognise this fault, so I could point BG's man in the right direction. You know the...
Hi all, I hope someone recognises this problem. I will waffle on a bit to try and give you all the information.
We have a Myson Midas Si combi boiler. It has an intermittent longstanding fault. Sometimes, when hot water has been running for, say, half a bath's worth, it gets into its head...