While you wait for answers, we may have found some information which could help you.
Click here for Error Boiler ShowingHow can I fix my chaffoteaux & Maury Britony Combi SE?
Chaffoteaux et Maury with no hot water?
Relight pilot?
My boiler won't light but will when we take the cover off ?
chaffoteaux brittony combi se 80?
pressure relief valve?