seems like you have a boiler with a thermoelectric setup in which case you may have a number of probs 1st:small pilot this is caused by dirt or soot deposits on the pilot light itself 2nd:flame lift off caused by leaking case seals or excessive flue pull 3rd: faulty thermoelectric heat phile
need more info on what boiler you have can mail me on:
qadeerahmed01@yahoo.co.uk
kad
August 2005