BoilerFaultCodesWhat the manual says
Manufacturer manualWiring from Fan to PCB insecure or lacks continuity, or failure of 230 VAC supply at Fan connections.
From this model's manual
Verified against the Ideal Logic Max System installation & service manual.
What causes this fault?
This fault occurs when the boiler's computer cannot detect that the fan is spinning fast enough to safely clear exhaust fumes from the building. The most common cause is a mechanical failure of the fan motor itself, though loose electrical connections or a fault with the main control board can also stop the fan from receiving power.
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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