While you wait for answers, we may have found some information which could help you.
Click here for Pressure Rising BoilerHow can I fix my boiler chaffoteaux&maury?
My boiler won't light but will when we take the cover off ?
pressure relief valve?
How can I fix my Chaffoteaux & Maury boiler?
gas water heater chaffoteaux britony 11t (geyser ) 11 years old?
Chaffoteaux Mx2 24 error 50?