While you wait for answers, we may have found some information which could help you.
Click here for Boiler Reset ButtonLost allen screw when bleeding boiler?
Riello 40 GXB boiler wont fire up?
My riello boiler won't start after replacing the water pump?
my riello oil burner just makes abuzzing sound?
Air lock in Riello burner?
Riello mectron 3m oil burner leak?