While you wait for answers, we may have found some information which could help you.
Click here for Remeha Pressure AvantaRemeha Avanta Plus 28c no hot water but still have heating?
help with remeha avanta plus combi boiler?
Remeha Avanta plus?
Remeha avanta boiler 28 - help???
E5 Error on Remeha Avanta Plus boiler?
How can I fix my Remeha Avanta Plus boiler?