Is there anyone out there who can shed light on a problem? I have a Potterton Suprema 40 gas boiler which keeps on turning itself off (red LED flashes to indicate an error) so I have to constantly reset it. Its not as if its a constant thing...sometimes it doesn't happen for a couple of days, sometimes 5 or 6 times a day. I'm not going to do any works myself but dont want to possible get ripped off if I call an engineer. Want to get my head round what the possible problems are. Anyone help?