F.378 — Burner in a fault state (Flame loss during stabilization or operating phase)

What does F.378 mean?

The burner is experiencing flame loss either during the stabilization period or while operating. This can be caused by gas supply issues, flue gas recirculation, or contamination.

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

Click steps to track your progress.

1. 1

   Reset the appliance.

2. 2

   Check your gas supply to ensure it's functioning correctly (e.g., ensure main gas valve is open).

3. 3

   If the fault persists, contact a qualified technician to check for flue gas recirculation or inspect the burner components for contamination.