Under Pressure

The central heating is being fixed tomorrow following the problem we had last week. We have been muddling through all week and this afternoon, the heating again refused to play ball.
In order to isolate the source of the problem, which I traced back to the valve that is being replaced tomorrow, I got into the loft to check the water pressure in the system. With the advice to keep it between one and two bar of pressure, I think this pretty much passes muster without any further consideration.
Back blipped on 3rd February 2015