On Thu, 13 Feb 2020 23:29:05 +0000, tony sayer
wrote:



When my Potterton Suprima was installed around 20 years ago I asked
the installer about servicing and he said that he wouldn't bother.
The closest it has come to a service was a few years later when the
PCB needed replacing (which I learned about here) and I cleaned out
the combustion chamber at the same time as replacing it.

Did you fit the newer PCB ?, after years of exchange ones we put the new
sort in, about 3 or 4 years ago been fine ever since

Yes, it was the Mk II board. No problems with it, must be more than 10
years now.