BoilerFaultCodesIdeal FAN FAULT Fault Code
Also written as FANFAULT — same fault.
The Ideal FAN FAULT fault code means: your boiler has detected a problem with its internal fan and has shut down as a safety precaution, meaning you will not have any heating or hot water.. It appears on 8 Ideal models in our database.
Technical description: Fan Fault.
What causes the Ideal FAN FAULT fault?
This fault occurs when the boiler's control system can no longer communicate with or power the internal fan, which is responsible for clearing exhaust gases. The most common reasons are the fan motor seized due to wear and tear, or a communication failure between the fan and the main circuit board. Because the boiler cannot safely vent fumes without the fan running at the correct speed, it will shut down immediately.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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Gas Safe Register →Ideal models that show the FAN FAULT fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Ideal FAN FAULT fault code information on this page is sourced and cross-checked against the official Ideal service / installation manuals for each affected model.
Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 27 April 2026