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Boiler flame

I’ve got a boiler Lennox GWB9-100IH unit starts goes power purge ignition valve flame. Flame last a few seconds and goes out  and then repeats  looking for and suggestions thanks 


  • pedmec
    pedmec Member Posts: 973
    Try cleaning the flame sensor. Your trial for ignition all seems to work except its not sensing flame. i would start there.
  • mattmia2
    mattmia2 Member Posts: 9,653
    Probably isnt proving flame. Show us pictures of the controls and the schematic.