Hi there. I am new to this forum, I am hoping someone can help. I recently wired a control box to my 824 combi. Everything was fine initially. A week or so later the boiler keeps wanting to fire even though the control box is not telling it to. When I wired it up I connected the switched live from the control box to terminal four in the boiler and this seemed to work. When it developed the problem i found that both terminals three and four in the boiler are both permanently live even when nothing is wired into them. This can't be right surely, I would have thought that only terminal three should be live and act as the live for a switch back to terminal four or have I got this wrong? Can someone assist please? Is it a circuit board fault?
Thanks, Jim
Thanks, Jim