De Dietrich 97580451 ionisation probe

The De Dietrich 97580451 ionisation probe (also listed under manufacturer codes 97580451 and 336.946.055) is a flame-sensing electrode for use with gas burners or boilers that rely on ionisation rectification. In a typical burner control sequence, the ignition electrode provides the spark to light the fuel, while the ionisation probe sits in the flame and picks up a small rectified current that the burner control interprets as a confirmed flame. If that current is absent or too weak, the control locks out. Parts of this type are selected by their physical dimensions — probe length, bend angle, insulator diameter, and the gap between the electrode tip and the burner earth — as well as the mounting flange pattern. The probe must match the geometry of the burner head or pilot burner for which it was originally shaped. An incorrect gap or bend can delay ignition or produce a weak flame signal. Ionisation probes are consumable components that operate directly in the flame zone. Typical service issues include tip erosion, cracked or sooted ceramic insulation, and a drifting spark gap that lengthens ignition time. When replacing, inspect the ceramic for hairline cracks and clean off any carbon deposits. Always verify that the gap matches the burner’s specification and that the probe is correctly earthed. No burner or boiler model compatibility beyond the De Dietrich brand is stated in the source data.