34 High

Dimplex 34 Fault Code

The Dimplex 34 fault code means: your boiler's main control board has encountered a memory error or is using the wrong configuration chip, preventing the unit from lighting a flame.. It appears on 2 Dimplex 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: CRC Error / No flame - Incorrect BCC (BCC’s only fitted to replacement PCB’s)
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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Dimplex models that show the 34 fault code

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

Source

Dimplex 34 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