I have a glowworm micron 40 ff, and my heating wont come on, I have plenty of hot water though. After following the troubleshooting section in the manual the flashing led's indicated a problem with the pcb and the manual said it needs replacing. However, since doing this I have turned everything off and restarted the system, and it now fires up for about 5-7 mins but not long enough to have any affect on the rads. My question....Is it still likely to be the pcb and how much would I be looking at to have it fixed. Side note:- I had a small flood about 2 weeks before the heating packed up, where water came through the ceiling in the kitchen where the micron is located. I know water can be fatal to the pcb, but wouldnt it have been instant?