F.71 — Burner in fault state: Fan speed too low

What does F.71 mean?

The burner is in a fault state because the fan speed is too low. This can indicate a physical obstruction or an incorrect setting.

• Fan blockage
• Incorrect gas type setting in commissioning assistant
• Incorrect flue system setting in commissioning assistant

Click steps to track your progress.

1. 1

   Check the fan unit for any blockages or debris.

2. 2

   Ensure the gas type setting in the commissioning assistant is correct for your boiler.

3. 3

   Verify the flue system setting in the commissioning assistant and correct it if necessary. Reset the boiler afterwards.