Many thanks - I am an idiot!!
The l shaped key was not contacting one of the valves properly as there was some gunge in it! It is now filling!! Many thanks for your help!
Nick
Hi All!
I have a Valliant turbomax Combi boiler, which is reg serviced. The pressure is dropping to near zero. I have tried to fill it with the key to let water from mains into the system.... this usually makes a whooshing noise. Unfortunatley the whoosh has stopped and so I believe the...