While you wait for answers, we may have found some information which could help you.
Click here for Hot Water Combination
Remeha boiler backfiring?
Remeha Avanta Plus 28c no hot water but still have heating?
How can I fix my Remeha Avanta Plus boiler?
My Remeha Avanta 28C condensing boiler shows an error code?
How can I fix my programmer RWB2 ?
how can i fix my item?