Anyone a plumber? Corgi registered. My boiler is driving me mad. Pressure too high, heating works but when turned off the pressure drops to 0. It's a vaillant combi.
Martin S. replied:
Chap called Neil Pegg valiant registered and gas safe 01625 431223 last used him 2 years ago we had the same issue it was a unit on the back of the boiler, had to remove boiler to fit it charged about £220 I think