A Glow-worm spare part, this ignition spark electrode is appropriate for Ikon, Protherm, Ultimate, Xeon and Micron boilers. An ignition (spark) electrode reasons the spark that starts combustion in the burner whilst flame sensing electrodes are chargeable for checking if there’s a flame gift withinside the burner to make certain that the boiler doesn`t maintain offering fueloline with out a flame.