BoilerFaultCodesVaillant d.62 Fault Code
Also written as D62 — same fault.
The Vaillant d.62 fault code means: this code is simply an information display showing the current temperature setting for your heating during the night, rather than an error or fault with the boiler's operation.. It appears on 20 Vaillant models in our database.
Technical description: Night set-back: 0 to 30
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
Find a Gas Safe engineer
Search the official register for a qualified engineer in your area.
Gas Safe Register →Vaillant models that show the d.62 fault code
Click a model for the full fault code list and model-specific repair notes.
- ecoFIT pure
- ecoFIT Pure 412
- ecoFIT Pure 418
- ecoFIT Pure 425
- ecoFIT Pure 435
- ecoFIT Pure 835
- ecoTEC plus
- ecoTEC Plus 615
- ecoTEC Plus 620
- ecoTEC Plus 625
- ecoTEC Plus 630
- ecoTEC Plus 635
- ecoTEC Plus 65
- ecoTEC Plus 832
- ecoTEC Plus 836
- ecoTEC Plus 840
- ecoTEC Plus 938
- ecoTEC plus System
- ecoTEC sustain
- Home System
Source
Vaillant d.62 fault code information on this page is sourced and cross-checked against the official Vaillant service / installation manuals for each affected model.
Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 27 April 2026