Blocking fault 7/h/ (3/2/8) - Momentary power interruption

What does 7/h/ mean?

There was a brief interruption in the boiler's power supply. This can disrupt its operation and lead to a blocking fault, stopping heating and domestic hot water. This requires a manual reset.

• Power flicker in the electrical supply
• Loose power connection to the boiler
• External electrical issue

Click steps to track your progress.

1. 1

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

2. 2

   Check the boiler's power cord and plug for secure connection.

3. 3

   If this fault occurs frequently, consult an electrician to check your home's power supply.