BoilerFaultCodesVaillant d.61 Fault Code
Also written as D61 — same fault.
The Vaillant d.61 fault code means: your boiler has recorded several failures that caused it to shut down for safety reasons, indicating a persistent underlying fault that requires professional diagnosis.. It appears on 32 Vaillant models in our database.
Technical description: Number of lock outs
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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A cover plan would handle faults like d.61: no call-out fees, no surprise bills.
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Vaillant models that show the d.61 fault code
Click a model for the full fault code list and model-specific repair notes.
- Atmomax Repair: £120-350
- ecoFIT Pure 418
- ecoFIT Pure 425
- ecoFIT Pure 435
- ecoFIT Pure 825 Repair: £120-250
- ecoFIT Pure 830 Repair: £150-350
- ecoFIT Pure 835
- ecoMAX Repair: £120-300
- ecoMAX 613 Repair: £120-250
- ecoMAX 618 Repair: £120-250
- ecoMAX 622 Repair: £150-350
- ecoMAX 635 Repair: £120-250
- Ecomax Condensing 600/800 series Repair: £120-250
- ecoMAX System 612 Repair: £150-350
- ecoTEC 65kW Repair: £150-350
- 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: £0-250
- ecoTEC sustain Repair: £120-250
- Home Combi Repair: £120-250
- Home System Repair: £100-£350
- Thermocompact Repair: £150-350
- Turbomax 824/828 Repair: £120-300
- Turbomax Plus Repair: £120-250
- Turbomax Plus 824/828E Repair: £120-300
- Turbomax Plus 828 Repair: £150-350
- Turbomax Plus 828 E Repair: £120-250
- Turbomax Plus VUW 242E Repair: £120-250
- Turbomax Plus VUW 242EH Repair: £150-350
Source
Vaillant d.61 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