BoilerFaultCodesTechnical description
The KIM that has been fitted is not compatible with the burner control unit
What causes this fault?
This fault occurs when the boiler's main control board cannot verify the identity of the specific model it is supposed to be operating. It is almost always caused by a mismatch between the interchangeable memory chip, known as the KIM, and the boiler's internal computer after a repair or part replacement. Think of it like trying to run modern software on an incompatible, older computer; the two components simply cannot speak the same language.
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.
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