How much does it cost to fix Ideal error code LLLLL ::::: FFFFF?

Typical repair cost for the Ideal LLLLL ::::: FFFFF fault is £150-350 including labour.

LLLLL ::::: FFFFF High

Ideal LLLLL ::::: FFFFF Fault Code

Q: What does the Ideal LLLLL ::::: FFFFF fault code mean?

Your boiler is failing to light the flame properly after three attempts, meaning it currently cannot provide heating or hot water.

Also written as LLLLLFFFFF — same fault.

The Ideal LLLLL ::::: FFFFF fault code means: your boiler is failing to light the flame properly after three attempts, meaning it currently cannot provide heating or hot water.. It appears on 3 Ideal models in our database.

Technical description: Boiler is not working for central heating or hot water but attempts to fire by going through 3 ignition attempts.

Typical repair cost £150-350 (including labour)

DIY fix possible

Check that your gas pre-payment meter has creditEnsure the gas stop tap is fully openReset the boiler by turning the mode knob to the 'reset' position for 2 seconds and then back to 'on'

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Ideal models that show the LLLLL ::::: FFFFF fault code

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

Source

Ideal LLLLL ::::: FFFFF 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