While you wait for answers, we may have found some information which could help you.
Click here for Error Code F5My Remeha Avanta 28C condensing boiler shows an error code?
How can I fix my Remeha Avanta Plus boiler?
pressure gauge fault?
I have a Remeha boiler - there is no error message but the rads dont work?
Remeha Avanta plus?
Remeha Avanta Plus 28c no hot water but still have heating?