How much does it cost to fix Vaillant error code D.096?

Cost varies. Contact a Gas Safe registered engineer for a quote.

D.096 Low

Vaillant D.096 Fault Code

Q: What does the Vaillant D.096 fault code mean?

Your boiler is currently resetting its internal configuration back to its original factory settings, which usually happens after a software update or a manual command.

Also written as D096 — same fault.

The Vaillant D.096 fault code means: your boiler is currently resetting its internal configuration back to its original factory settings, which usually happens after a software update or a manual command.. It appears on 6 Vaillant models in our database.

Technical description: Resetting parameters to factory settings

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 D.096 fault code

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

ecoFIT pure
ecoFIT Pure 418
ecoFIT Pure 425
ecoFIT Pure 435
ecoFIT Pure 830
ecoFIT Pure 835

Source

Vaillant D.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 27 April 2026