My Glow-worm boiler 30CXI is flashing at pressure 1.6. At first the pressure was 0.3 and would not fire up. I released some pressure from the valve under the boiler and the pressure went up to 1.5, it actually heated the water on 2 occasions but now will not. It has been flashing 1.6 since. What can I do to fix the problem? Please help

Nickie Gavin, June 2010