BoilerFaultCodesDimplex 13 Fault Code
The Dimplex 13 fault code means: your boiler has shut down because a temperature sensor in the exhaust pipe has detected a fault or the system is unable to safely verify that a flame has been established.. It appears on 2 Dimplex models in our database.
Technical description: No flame - Flue thermistor failure
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 13 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Dimplex 13 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