I went to put on my heating for the first time since the spring and it doesn't seem to want to start, but i did notice the timer clock has stopped working (no display), i realise i need a new clock, but is this the reason the heating wont kick in. The domestic hot water is fine and has continued to work no problem. I turned the boiler off and then the power and had a look at the wires that go to the clock and followed them the other way, all the wires seem to be connected OK. I also changed the fuse on the power supply for a new one (3 amp) Any help would be welcomed, as the winter is looming. Cheers