F.378 — Burner in fault state: Flame loss during operation

What does F.378 mean?

The burner is in a fault state due to a flame loss during the stabilization or operating phase. This indicates an issue with maintaining the flame.

• Insufficient gas supply or low gas pressure
• Flue gas recirculation
• Contamination of ionization electrode and/or flame body assembly

Click steps to track your progress.

1. 1

   Check your gas supply and ensure the gas pressure is sufficient.

2. 2

   Inspect the flue gas system for any signs of recirculation.

3. 3

   Check the ionization electrode and flame body assembly for contamination. Reset the boiler afterwards.