BoilerFaultCodesWhat the manual says
Manufacturer manualFan or fan wiring error
From this model's manual
Verified against the Main/Main Eco Compact installation & service manual.
What causes this fault?
This fault occurs when the boiler's control system detects that the fan is not spinning fast enough to safely remove exhaust fumes. The most common reasons are a mechanical failure within the fan motor itself, loose electrical connections, or a fault on the main circuit board that prevents power from reaching the fan.
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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Related fault codes
All 71 fault codes on the Eco Compact Combi
Seeing a different code? Every code this model can display, in one place.