Ok. In the mean time is there a pattern to the lockouts and are you having to bleed the pump at all to get it going again?
Hollie not returned yet, but this morning just to get a some hot water i hit reset, and boiler lit and run. Then i touched heated towel rails, hot. Radiators cold. boiler on standby. So went to the control and turned up the heating as it was only on 18 deg. fired and went straight to lock out. Which i videoed. But its to big a file to send on my email and down load onto here. But i can text it if any one is interested. As an experiment ive turned off the heating and see if it will fire up on demand for hot water. So im waiting for it to stand down. Turn the hot water taps and drain it and see if it fires up for more hot water. If someone would like to to see the video, i can text or whats app. _ no went to lock out few minutes later, Im now upto to just short of 500 quid spent and still not working.Well Hollie is coming back, and I am on google searching exorcists just to cover all the bases. At least my sense of humour is not locking out I suppose.