L.096 High

Vaillant L.096 Fault Code

Also written as L096 — same fault.

The Vaillant L.096 fault code means: your boiler's gas control mechanism has reached its operational adjustment limit, meaning it can no longer properly balance the fuel and air mix to heat your home safely.. It appears on 3 Vaillant 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: The gas valve stepper motor has reached the maximum permissible step number.
Typical repair cost £200-350 (including labour)

Engineer required

This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

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Vaillant models that show the L.096 fault code

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

Source

Vaillant L.096 fault code information on this page is sourced and cross-checked against the official Vaillant service / installation manuals for each affected model.

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