water pressure?
I HAVE A VOKERA UNICA HE BOILER WHICH IS ONLY 1 AND A HALF MONTHS OLD AND THE PRESSURE GAUGE KEEPS FALLING AND THE ERROR 40 KEEPS FLASHING, CALLED BACK THE PLUMBER WHO SAID THAT A SPRING HAS GONE IN THE RELEASE VALVE, BUT THE PROBLEM IS STILL THERE, CAN ANYONE HELP PLEASE
STUART POOLE, January 2009