You must have made a mistake with the model.
fault 08 on a Vokera is an overheat on the burner. This feature is only on the air-gas modulation models.
i.e
Linea plus
Linea 726,730,735
Mynute 35e
Syntesi & Synergy
let me know which model you have.
If it is a Mynute 28e then I would suggest that the PCB has been changed with the wrong replacement.
Steve
October 2006