I have a Vokera Linea 24 combination boiler. There is a constant sound in the house like water is running and the tank is constantly filling. The radiators sound like there is water running through them all the time, even when I turn them off at the valves on each one. This problem started a couple of weeks ago and happens all the time, the noise continues day & night. I have not changed anything recently. The pressure in the boiler drops all the time and I need to top it up. This has always happened since it was installed 6 years ago. It's been looked at several times, but I was told it could be a tiny leak anywhere in the pipes under the floors and we would probably never find it. The pressure drops more quickly now though and I need to top it up every couple of days. When I turn boiler to hot water only, the noise stops. Thanks for any advice you can give.
