We may have found other answers which could help you.
Click here for Pressure Gauge BoilerRemeha Avanta Plus not not activating heating?
help with remeha avanta plus combi boiler?
Remeha Avanta Plus 28c no hot water but still have heating?
My Remeha Avanta 28C condensing boiler shows an error code?
Remeha avanta boiler 28 - help???
How can I fix my Remeha Avanta Plus boiler?