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Mend Glow-worm 40FF Pilot Light Sparking

glow worm 40ff pilot light is lit but ingnitor keeps sparking ?

glow worm 40ff pilot light is lit but ingnitor keeps sparking and main burner will not kick in it sounds like a thermocoupler but I can't see one for the pilot!!! Please help

Mike c
September 2009
Flame sensing electrode

Heat doctor
October 2015

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