L.095 High

Vaillant L.095 Fault Code

Also written as L095 — same fault.

The Vaillant L.095 fault code means: your boiler's gas control mechanism is struggling to adjust, which means it cannot regulate the flame correctly and will stop heating water to stay safe.. It appears on 4 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 minimum permissible step number.
Typical repair cost £180-350 (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.095 fault code

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

Source

Vaillant L.095 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 31 August 2026