F.468 - Burner in a fault state due to high ionization current

What does F.468 mean?

The boiler's burner has entered a fault state because the ionization current was too high during calibration. This can be caused by issues with the ionization electrode, or excessive dust in the ventilation air leading to deposits.

• Ionization current too high during calibration
• Incorrect gap between ionization electrode and flame body assembly
• Dust in the ventilation air (e.g., from construction work)
• Deposits on electrodes indicating foreign bodies in ventilation air

Click steps to track your progress.

1. 1

   A qualified technician should check the gap between the ionization electrode and flame body assembly.

2. 2

   Check whether there is a lot of dust in the ventilation air, such as from construction work.

3. 3

   Check the installation room and flue system for causes of deposits (e.g., laundry detergents, cleaning agents).

4. 4

   Reset the boiler by turning it off and on again.