LLL High

Vokera LLL Fault Code

The Vokera LLL fault code means: your boiler's internal computer has encountered a software error that has caused it to stop working for safety.. It appears on 2 Vokera models in our database.

Call an engineer soon

Book a Gas Safe engineer within 24 to 48 hours. Your boiler may be unsafe or could break down completely if left.

Technical description: GENERIC FIRMWARE BLOCK
Typical repair cost £180-350 (including labour)

DIY fix possible

Locate the power switch or fused spur for the boiler.Turn the power off and wait for 30 seconds.Turn the power back on to see if the control board reboots and clears the error.

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Vokera models that show the LLL fault code

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

Source

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

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 7 July 2026