How much does it cost to fix Ideal error code F03?

Typical repair cost for the Ideal F03 fault is £220-380 including labour.

F03 High

Ideal F03 Fault Code

Q: What does the Ideal F03 fault code mean?

Your boiler has stopped working because the fan that removes waste gases is not spinning correctly, causing the system to shut down for safety.

The Ideal F03 fault code means: your boiler has stopped working because the fan that removes waste gases is not spinning correctly, causing the system to shut down for safety.. It appears on 3 Ideal models in our database.

Technical description: Fan Fault

What causes the Ideal F03 fault?

This fault occurs when the boiler's control system detects that the fan is not spinning or is rotating at the wrong speed to safely clear waste gases. The most common reason is a mechanical failure within the fan motor or a communication error between the fan and the main circuit board. Without the fan functioning correctly, the boiler cannot safely ignite and will shut down as a precaution.

Typical repair cost £220-380 (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 F03 fault code

Click a model for the full fault code list and model-specific repair notes.

Source

Ideal F03 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