While you wait for answers, we may have found some information which could help you.
Success
Message
Bosch W275 water heater, diaphragm leaking?
How to heat water when therm. is off?
LPG bosch w-135?
Bosch W275 water heater fault?
how do you relight the combi boiler?
Bosch 24i Combi-boiler?
how can i fix pilot light?
Grundfos UPS 15 45 x18 central heating pump?
Bosch 30CDi how do I restore the pressure. ?
no blue light from the bosch boiler?
boiler wont stay alight?
how can i fix my bosch worchester 24cdi boiler?