Hi all i am having more problems with my potterton 80e again. It started intermitantly not flaming up now wont ignite at all. When you turn on the hot water tap or the central heating you can hear the pump start up but no green flame led iluminates and the pump just keeps running until you switch it of, initially after a few attemps it would flame but not now it seems to have given up completely. Does anybody have any ideas hopefully this wont be an expensive repair