try turning tap under boiler to fill back up with water, then press reset button.
How much pressure do you put back in? well I put between 1 and 2 on guage in mine, and have no probs.
Hope this helps, failing that pm Dodie
or See add for phone number
I could come and sort it, but I dont like messing with gas appliances, (i dont mind topping my own up, but would not do it for other people, incase something happened) I know there is a very small chance something could happen, but I wont take the chance.