FAN FAULT High

Ideal 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 15 Ideal models in our database.

Call an engineer soon

Book a Gas Safe engineer within 24 to 48 hours. Your boiler may be unsafe or could break down completely if left.

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.

Typical repair cost £250-£450 (including labour)

Engineer required

This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

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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 7 July 2026