FF — Internal fault or reset button blocked

What does FF mean?

The burner is in a fault mode due to an internal fault or because the reset button 'R' is physically blocked or stuck.

• Internal fault within the boiler's control system
• Reset button 'R' is mechanically blocked or damaged

Click steps to track your progress.

1. 1

   Inspect the reset button 'R' to ensure it is not physically stuck or blocked.

2. 2

   Restart the boiler by cycling its main power supply (turn off, wait 30 seconds, turn on).

3. 3

   If the equipment will not restart or the fault persists, contact a qualified heating technician to replace the control unit.