Hello all,

I have a Potterton (probably now Baxi/Potterton) Envoy 40 condenser boiler
which is acting up. It seems to switch between apparently working ok (albeit
briefly) then flicking between code 8 and code 0 before cutting back in for
a few minutes before starting the cycle again. For the life of me, I can't
find any worthwhile information elsewhere on this boiler.

Can anyone please spare my sanity and give me a step for a hint on what
fault code 8 is?

Much obliged:

Dougie Smith