BoilerFaultCodesTechnical description
The burner control unit that has been fitted is not compatible with the KIM (boiler identification module)
What causes this fault?
This fault occurs when the boiler's main control board and its identity module are not 'speaking the same language' or are electrically mismatched. It usually happens after a repair where a technician has installed a replacement part that is the wrong version for your specific model, or if the internal data on one of the chips has become corrupted. Because these two brains must work in perfect harmony to ensure safe operation, the boiler shuts down until they are matched correctly.
Engineer required
This is a high severity fault. Stop using the boiler and call a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
Find a Gas Safe engineer
Search the official register →