VOKERA LINEA 28 COMBI BOILER -
My boiler lost pressure (had been leaking drops of water for a while). So I refilled it and have left the reilling cap on. Pressure has risen to 1.9 bar. I have had to leave the refill cap on. If I take it off water pours out and pressure it lost. I need to call an engineer in, but like to have some idea as to what the problem might be. Any ideas or suggestions??