Had you read my last reply you would have seen that I haven't even seen the boiler, it's at a friends house in another part of the country.
Both your attitudes are exactly why I have as little to do with 'professionals' as possible. As it happens, I think it's under warranty and it's going to...
I suspect that you don't know the answer either else you would probably have been more forthcoming.
Perhaps there's someone who isn't a smart arse and who knows about this boiler who would like to help?
The diverter valve appears so have six wires, is there some kind of feedback that tells...
The boiler works fine for domestic hot water and the pressure remains at a constant 2 bar.
When the Central heating is turned on, the boiled fires up ok briefly but then shuts down.
It then goes through a restart sequence 5 times before locking out with the blue light off then flashing...