F.381 — Burner in fault state: Flame loss during operation phase

What does F.381 mean?

The burner is in a fault state due to a flame loss during its normal operating phase. This indicates a sustained issue with flame stability.

• Insufficient gas supply or low gas pressure
• Flue gas recirculation in balanced flue system
• Incorrect clearance or 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 balanced flue system for any signs of flue gas recirculation.

3. 3

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