Wondering if anyone can help, we have a halstead finest gold boiler and the safety lock out keeps coming on when we turn the hot taps on. It hasnt been so bad whilst its been warm, but its going off again now its cooled slightly. We have had a plumber out before and he couldnt find anything wrong with it, he altered the pressure to just over 1 but we are still getting the same issue, do we need a new boiler??