Blocking fault 6/a/ (2/2/7) - Insufficient ionization current after 4 startup attempts

What does 6/a/ mean?

After four attempts to ignite, the boiler still detects an insufficient ionization current. This indicates a persistent problem with the burner lighting correctly, preventing heating and domestic hot water. This is a blocking fault, requiring a manual reset.

• Persistent ignition fault
• Gas supply issue
• Faulty electrode
• Dirty burner
• Control unit issue

Click steps to track your progress.

1. 1

   Press the 'Reset' button on the BC10 basic controller.

2. 2

   Verify that the gas isolation valve to the boiler is fully open.

3. 3

   If the fault reoccurs, contact a qualified service technician to inspect the burner and ignition system.