Some times when the boiler is running on central heating,the cut out opperates and L.E.flashes.Nothing works untill the reset is pressed and then all works normaly for about a 12 to 18 hours.The system water pressure is about 1 bar and no leaks.We have a remote timer set for early morning and evening.Before I call out a qualified engeneer I would like to know what the problem is likely to be.I have not been able to find this error code on any site or manual.
Cheers
Peter

Peter, January 2012