BoilerFaultCodesWhat the manual says
Manufacturer manualFan or Fan Wiring Fault
From this model's manual
Verified against the Potterton/Potterton Ultra 12 System installation & service manual.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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All 23 fault codes on the Ultra 18 System
Seeing a different code? Every code this model can display, in one place.