While you wait for answers, we may have found some information which could help you.
Click here for 50 Problem TurnHow can I fix my Chaffoteaux & Maury boiler?
chaffoteaux brittony combi se 80?
Chaffoteaux Mx2 24 error 50?
Relight pilot?
gas water heater chaffoteaux britony 11t (geyser ) 11 years old?
pressure relief valve?