While you wait for answers, we may have found some information which could help you.
Click here for Boiler Heating Faulty
E5 Error on Remeha Avanta Plus boiler?
How can I fix my Remeha Avanta Plus boiler?
how can i fix my item?
Remeha boiler backfiring?
Remeha Avanta Plus not not activating heating?
My Remeha Avanta 28C condensing boiler shows an error code?