E10
De Dietrich Flame Instability / Flame Loss

Display shows flame loss during operation, unit cycles on and off frequently

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Safety Warning

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

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Possible Causes

Dirty burner on De Dietrich premix burner, Faulty flame ionization electrode, Poor gas quality or fluctuating pressure, Blocked or partially blocked flue

How to Fix / Troubleshooting

Safety first: Turn off power and gas before opening the combustion chamber.

Step-by-step checks:

  • Check flue and air intake: Ensure both are clear and properly connected.
  • Inspect flame sensor: Locate the flame ionization electrode. Clean the metal rod gently with fine abrasive pad to remove oxidation. Ensure correct positioning relative to the burner as per the service manual.
  • Visual burner check: Look for heavy soot or debris on the burner surface. Do not disassemble the burner without proper instructions.

When to call a professional: Persistent flame loss requires combustion analysis and possibly burner cleaning or replacement by a qualified technician.

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Repair Difficulty

Professional Required 5/5

Required Part

Flame Ionization Electrode
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