Weird “Unfixable” boiler sound?

[AJ A]

So I posted this question on this forum a few months ago but it still has not been fixed.
There’s been a sound coming from my boiler which is apparently not fixable. I have been told by a plumber that it is due to condensation from the cold weather? sounds like bs, but is it correct? I’m not sure exactly what boiler it is at I live with my mum and it’s hers but it’s a combi if that helps.


Surely there is something that can be done about this?
Many thanks

 

[Riley]

Need to find out make and model. Maybe try another engineer or get the manufacturer out for a fixed cost repair

 

[king of pipes]

Very much doubt that more info needed though ?