While you wait for answers, we may have found some information which could help you.
Success
Message
chaffoteaux brittony combi se 80?
My heating and hot water do not work and “A03” is flashing?
pressure relief valve?
How can I fix my chaffoteaux & Maury Britony Combi SE?
My boiler won't light but will when we take the cover off ?
chaffoteaux calydra 80 combi boiler?
Chaffoteaux et Maury with no hot water?
How can I fix my boiler chaffoteaux&maury?
Relight pilot?
Chaffoteaux Mx2 24 error 50?
gas water heater chaffoteaux britony 11t (geyser ) 11 years old?
How can I fix my Chaffoteaux & Maury boiler?