While you wait for answers, we may have found some information which could help you.
Click here for Combi Works Hotpressure relief valve?
Chaffoteaux et Maury with no hot water?
How can I fix my chaffoteaux & Maury Britony Combi SE?
My boiler won't light but will when we take the cover off ?
chaffoteaux calydra 80 combi boiler?
My heating and hot water do not work and “A03” is flashing?