De Dietrich Ignition electrode S100890

The De Dietrich S100890 ignition electrode is a consumable component used in burners and boilers to generate a spark for igniting the fuel-air mixture. It is positioned directly in the flame zone and operates under high-voltage pulses from the ignition transformer. This electrode is resistant to soot, which helps maintain consistent spark performance. Its typical failure modes include erosion of the metal tip and cracking of the ceramic insulator.

When selecting a replacement ignition electrode of this type, verify physical characteristics such as overall length, bend angle, insulator diameter, electrode gap, and mounting flange shape. The electrode must match the burner series for which it was originally designed to ensure correct spark position relative to the burner head or pilot burner. Confirm that the new part replicates the original geometry and mounting arrangement to maintain proper clearance and spark location.

Common failure modes for ignition electrodes include erosion of the metal tip, cracking of the ceramic insulator, sooting that bridges the gap, and gradual drift in gap distance. These issues can prolong ignition or prevent sparking altogether. Check the electrode for visible damage, soot buildup, or changes in gap spacing when ignition problems occur.