hi there i have lived here for 3 months now and boiler VOKERA SYNTESI25e has been working fine until last week the pressure dropped to zero. i have managed to get pressure back up to 2 bar and the hot water is working fine again now, but the central heating wont fire up at all. i have bled the radiators which has made no difference. it was working great until pressure dropped. Any help massivly appreciated fanx JAMIE
