Blocking fault 6/c/ (3/0/6) - Ionization current detected after burner shut down

What does 6/c/ mean?

An ionization current is still being measured even after the burner has shut down. This suggests gas is still burning or a sensor is faulty, posing a safety risk. Heating and domestic hot water are unavailable. This is a blocking fault.

• Faulty gas valve (leaking)
• Faulty ionization electrode
• Control unit issue

Click steps to track your progress.

1. 1

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

2. 2

   If you smell gas, turn off the main gas supply to the boiler and ventilate the area, then contact an emergency gas service.

3. 3

   Contact a qualified service technician immediately to inspect the gas valve and ionization electrode.