6 Emergency

Dimplex 6 Fault Code

The Dimplex 6 fault code means: your boiler is still detecting a flame for a few seconds after it has been told to turn off, which is a safety concern that requires a professional inspection.. It appears on 3 Dimplex models in our database.

Act immediately

Turn off your boiler and stop using gas appliances. Call a Gas Safe engineer now. This fault can be dangerous if ignored.

Technical description: Defective gas valve / Flame continues after demand ends - 5 sec flame signal after burner is switched off
Typical repair cost £280-450 (including labour)

Engineer required

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

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Dimplex models that show the 6 fault code

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

Source

Dimplex 6 fault code information on this page is sourced and cross-checked against the official Dimplex service / installation manuals for each affected model.

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