How much does it cost to fix Heatline error code F1?

Typical repair cost for the Heatline F1 fault is £100-£280 including labour.

F1 High

Heatline F1 Fault Code

Q: What does the Heatline F1 fault code mean?

Your boiler has tried to light several times but has been unable to sustain a flame, meaning you will have no heating or hot water until it is reset.

The Heatline F1 fault code means: your boiler has tried to light several times but has been unable to sustain a flame, meaning you will have no heating or hot water until it is reset.. It appears on 10 Heatline models in our database.

Technical description: Ignition Failure / Ionization Flame Failure

Typical repair cost £100-£280 (including labour)

DIY fix possible

Check if your gas meter has credit or other gas appliances are workingEnsure the gas isolation valve under the boiler is fully openPress and hold the 'Reset' button (the one with the flame symbol) for 2-3 seconds

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Heatline models that show the F1 fault code

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

Source

Heatline F1 fault code information on this page is sourced and cross-checked against the official Heatline service / installation manuals for each affected model.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 27 April 2026