BoilerFaultCodesVaillant d.68 Fault Code
Also written as D68 — same fault.
The Vaillant d.68 fault code means: your boiler has failed to complete its initial setup process, meaning it has not been able to successfully ignite or confirm its internal settings since it was last powered on.. It appears on 32 Vaillant models in our database.
Technical description: No first start
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.68 fault code
Click a model for the full fault code list and model-specific repair notes.
- Atmomax Repair: £100-280
- ecoFIT Pure 418 Repair: £100-280
- ecoFIT Pure 425 Repair: £100-280
- ecoFIT Pure 435 Repair: £100-280
- ecoFIT Pure 825 Repair: £120-250
- ecoFIT Pure 830 Repair: £120-250
- ecoFIT Pure 835 Repair: £100-280
- ecoMAX Repair: £150-300
- ecoMAX 613 Repair: £150-300
- ecoMAX 618 Repair: £120-250
- ecoMAX 622 Repair: £150-300
- ecoMAX 635 Repair: £150-300
- Ecomax Condensing 600/800 series Repair: £150-350
- ecoMAX System 612 Repair: £150-300
- ecoTEC 65kW Repair: £120-250
- ecoTEC Plus 615 Repair: £120-250
- ecoTEC Plus 620 Repair: £120-250
- ecoTEC Plus 625 Repair: £120-250
- ecoTEC Plus 635 Repair: £120-250
- ecoTEC Plus 840 Repair: £120-250
- ecoTEC plus aquaPLUS Repair: £120-250
- ecoTEC sustain Repair: £120-250
- Home Combi Repair: £120-250
- Home System Repair: £100-280
- Thermocompact Repair: £120-250
- Turbomax 824/828 Repair: £120-250
- Turbomax Plus Repair: £120-250
- Turbomax Plus 824/828E Repair: £120-250
- Turbomax Plus 828 Repair: £120-250
- Turbomax Plus 828 E Repair: £150-300
- Turbomax Plus VUW 242E Repair: £150-350
- Turbomax Plus VUW 242EH Repair: £120-250
Source
Vaillant d.68 fault code information on this page is sourced and cross-checked against the official Vaillant service / installation manuals for each affected model.
- Vaillant ecoFIT Pure 425 manual (PDF)
- Vaillant ecoFIT Pure 835 manual (PDF)
- Vaillant Ecomax Condensing 600/800 series manual (PDF)
Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 31 August 2026