While you wait for answers, we may have found some information which could help you.
Click here for Could Wrong Sepressure relief valve?
Chaffoteaux Mx2 24 error 50?
gas water heater chaffoteaux britony 11t (geyser ) 11 years old?
How can I fix my Chaffoteaux & Maury boiler?
Chaffoteaux et Maury with no hot water?
My heating and hot water do not work and “A03” is flashing?