i am no expert but the same has happened to mine in the past it has been the thermo couple that has packed in thats the one next to the pilot and the ignition or it could be the exhaust fan these have a common fault and may need a flick with a screw driver or it coud be either of the two fuses on the pcb board hnder the boiler apart from that you may need an expert. if any one reads this who has any other ideas please pass on
Tommy
October 2007