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