F.463 — Burner in fault state: Contaminated combustion air or flue gas recirculation

What does F.463 mean?

The burner is in a fault state due to contaminated combustion air or flue gas recirculation. Foreign bodies or deposits can interfere with the combustion process.

• Contaminated combustion air (e.g., from detergents, cleaning agents, toiletries)
• Flue gas recirculation
• Deposits in the ventilation air supply (chimney)

Click steps to track your progress.

1. 1

   Check the flue system for contamination and signs of flue gas recirculation. Clean it if necessary.

2. 2

   Inspect the installation room for sources of combustion air contamination, such as chemical vapors.

3. 3

   Reset the burner by briefly turning off and on its power supply. If deposits are found, contact an engineer for further cleaning.