BoilerFaultCodesTechnical description
System fault boiler electronics / basic controller
What causes this fault?
This fault occurs when the boiler's internal computer chips stop talking to each other correctly, leading to a total communication breakdown. The most common reason is a physical failure of the circuitry on the main control board or a loose internal data connection that prevents the boiler from safely managing the gas and heat. It is essentially the boiler equivalent of a 'blue screen of death' on a computer.
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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