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