Boiler shows F41; may indicate ignition or flame failure on some Ferroli models.

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

Possible Causes

Low gas pressure, Faulty ignition electrode, Faulty gas valve, Blocked burner

Safety first: Gas components must only be serviced by a Gas Safe engineer.

User checks: Confirm other gas appliances work and that the gas isolation valve under the boiler is open.
Reset once: If F41 returns, stop resetting.
Engineer checks:
- Inspect and clean ignition and flame sensing electrodes.
- Check gas pressures and adjust/replace gas valve as needed.
- Clean burner and combustion chamber.

Professional Required 5/5

Ignition Electrode

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