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error Ideal
Error Code F3
Fan system fault — the fan is not working properly.
? What Causes This
Failure of the internal fan or external blockage affecting airflow.
✓ How to Fix It
- Restart the boiler to clear transient faults.
- If issue persists, contact Ideal (warranty period) or Gas Safe Registered Engineer.
Source: page 9 of the official manual
From the manual
This error code appears in:
Ideal Boilers I 24