The above boiler has stopped working. No lights on it at all. Pump etc. seems to get going when timer comes on. Has anyone any idea what the problem could be. Looking at instruction book seems not to be a boiler problem, but more that there is no electricity to it. The programmer etc. light up. If I remove fuse from spur point it all goes off and comes back on when fuse returned. Expansion tank is in loft so have not been up to look at it.