Blocking fault 7/c/ (2/3/1) - Power interrupted during a locking fault

What does 7/c/ mean?

The boiler's power supply was interrupted while it was already experiencing a locking fault. This has now escalated to a blocking fault, stopping all heating and domestic hot water. This requires a manual reset.

• Previous unresolved locking fault
• Power outage or fluctuation
• Loose power connection to the boiler

Click steps to track your progress.

1. 1

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

2. 2

   Ensure the boiler's power connection is secure and not loose.

3. 3

   If the fault persists, contact a qualified service technician to diagnose the original locking fault and power supply.