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