Blocking fault 9/h/ (2/7/2) - UBA 3 or KIM control unit is defective

What does 9/h/ mean?

Either the UBA 3 or the KIM control unit within the boiler is defective. This critical internal component failure stops all heating and domestic hot water operation. This is a blocking fault, requiring a manual reset.

• Internal control unit failure (UBA 3 or KIM)
• Electrical fault within the control unit

Click steps to track your progress.

1. 1

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

2. 2

   Power cycle the boiler by switching it OFF and then ON at the main power switch.

3. 3

   If the fault persists, contact a qualified service technician for diagnosis and potential replacement of the UBA 3 or KIM unit.