F0 — Internal fault (control unit)

What does F0 mean?

The burner is blocked due to an internal fault within the boiler's control unit.

• Malfunction of the control unit
• Damaged internal components

Click steps to track your progress.

1. 1

   Attempt to reset the boiler by pressing the reset button 'R'.

2. 2

   Ensure the main power supply to the boiler is stable and secure.

3. 3

   Contact a qualified heating technician to diagnose and replace the control unit.