While you wait for answers, we may have found some information which could help you.
Click here for Pilot Light Windygas water heater chaffoteaux britony 11t (geyser ) 11 years old?
My boiler won't light but will when we take the cover off ?
How can I fix my Chaffoteaux & Maury boiler?
My heating and hot water do not work and “A03” is flashing?
Chaffoteaux et Maury with no hot water?
Relight pilot?