While you wait for answers, we may have found some information which could help you.
Click here for Boiler Heating Error Code
hotwater downstairs no hotwater upstairs in bath and sink ?
How can I fix my boiler chaffoteaux&maury?
My heating and hot water do not work and “A03” is flashing?
Britony combi SE 80 by Chaffoteaux & Maury error 40/80 but CH pressure ok?
How can I fix my Chaffoteaux & Maury boiler?
I have a Chaffoteaux & Maury water heater Britony 11 T???