britney combi bolier se model?

i have a britney boiler in my house, every now and then the boiler use to show the red light, and will reset it and then it will be fine. however in the past few days the bolier has been showing the red light and when i press the reset button it dosne appar to be clicking to ignight. i have chaged the ignition probe and it started to click but again no ignition. i have had a specilist have a lookat it and has said to me it could be the PCB board which is costing an arm and a leg can anyone help?