While you wait for answers, we may have found some information which could help you.
Success
Message
suprima 50?
Potterton performa 24 boiler?
identifying the flow and return pipe?
Potter powermax HE won't refill?
Radiators?
changing a FP 2000 Programmer?
We are not getting hot water Whymight that be?
threeway valve?
No heating or hot water?
no fault code ?
dhw working fine but chw switsh off after 10 second?
How to get hot water?