BoilerFaultCodesWhat the manual says
Manufacturer manualFan Assembly WHS
Shared across the 24/28CDi II RSF range
This code is shared by the boilers in this range, which use the same control board. It may not be printed in this exact variant’s manual.
What causes this fault?
This fault occurs when the boiler's control board cannot detect that the fan is spinning at the correct speed to safely clear 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 it from sending power to 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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All 23 fault codes on the 24/28CDi II RSF
Seeing a different code? Every code this model can display, in one place.