Can you confirm the system pressure on the gauge?
Do you knw how to refill the system?
Do you have a silver flexible pipe under the boiler?
IS there a valve on one or both ends?
there's a valve at both ends to open or close similar to the type fitted when you want to turn off water to an appliance
Ok, turn one on - then turn the other on slowly
You will get a slight whistling - take the pressure up to 1.5 bar and turn them both off again
Once over about 0.5 bar the boiler will fire again
i can hear water going through
Watch the pressure rise and then turn off at 1.5bar
pressure gone straight to 2,8
You should have just turned the valve on slowly?
Turn them both off
Lower the pressure by venting a radiator into a tub
Back down to 1.5bar
Cool - boiler working?
great news - well done.
Remember this for next time :-P