I don't have the MIs and when Scottish Gas serviced the boiler recently I was told it was a pipe problem and nothing wrong with the boiler.
I think I will get them back out and save myself some time and effort.
Many thanks
Recently when running the hot water the pressure gauge for the heating starts to wildly fluctuate back and forth accompanied by a strange noise from the boiler.
In addition it tends to loose complete pressure over 3 days. I have had the pipes checked out and there is nowhere that that amount...