While you wait for answers, we may have found some information which could help you.
Click here for Boiler Heating Thermostat
Remeha boiler backfiring?
My Remeha Avanta 28C condensing boiler shows an error code?
Remeha Avanta Plus 28c no hot water but still have heating?
how can i fix my item?
Remeha avanta boiler 28 - help???
I have a Remeha boiler - there is no error message but the rads dont work?