BoilerFaultCodesVaillant D.60 Fault Code
Also written as D60 — same fault.
The Vaillant D.60 fault code means: your boiler has shut down multiple times because it reached a dangerously high temperature and is recording how often this safety limit has been triggered.. It appears on 37 Vaillant models in our database.
Technical description: Number of safety temperature cut offs
What causes the Vaillant D.60 fault?
This fault occurs when the boiler's internal water temperature exceeds safe limits, forcing the system to shut down to prevent damage. The most common reason is a lack of water circulation, often caused by a failing pump or a blockage in the heat exchanger that prevents heat from leaving the unit. It can also be triggered by faulty sensors that are incorrectly reading the system temperature.
This issue often surfaces when the heating is first turned on after summer, as pump components can seize up during long periods of inactivity.
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.
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A cover plan would handle faults like D.60: no call-out fees, no surprise bills.
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Vaillant models that show the D.60 fault code
Click a model for the full fault code list and model-specific repair notes.
- Atmomax Repair: £120-350
- ecoFIT Pure 418 Repair: £80-200
- ecoFIT Pure 425 Repair: £80-220
- ecoFIT Pure 435 Repair: £100-250
- ecoFIT Pure 825 Repair: £150-300
- ecoFIT Pure 830 Repair: £120-250
- ecoFIT Pure 835 Repair: £120-£250
- ecoMAX Repair: £150-300
- ecoMAX 613 Repair: £150-300
- ecoMAX 618 Repair: £150-300
- ecoMAX 622 Repair: £150-300
- ecoMAX 635 Repair: £150-350
- ecoMAX 824E Repair: £120-250
- ecoMAX 828E Repair: £150-350
- Ecomax Condensing 600/800 series Repair: £150-300
- ecoMAX System 612 Repair: £150-350
- ecoTEC Repair: £120-£350
- ecoTEC 65kW Repair: £150-350
- ecoTEC Plus 615 Repair: £150-300
- ecoTEC Plus 620 Repair: £150-300
- ecoTEC Plus 625 Repair: £150-300
- ecoTEC Plus 630 Repair: £150-300
- ecoTEC Plus 635 Repair: £150-300
- ecoTEC Plus 840 Repair: £150-300
- ecoTEC plus aquaPLUS Repair: £120-450
- ecoTEC Pro / ecoTEC Plus Repair: £150-350
- ecoTEC sustain Repair: £150-300
- Home Combi Repair: £150-300
- Home System Repair: £100-£350
- Thermocompact Repair: £150-300
- Turbomax 824/828 Repair: £150-300
- Turbomax Plus Repair: £150-350
- Turbomax Plus 824/828E Repair: £150-300
- Turbomax Plus 828 Repair: £150-300
- Turbomax Plus 828 E Repair: £150-350
- Turbomax Plus VUW 242E Repair: £150-350
- Turbomax Plus VUW 242EH Repair: £150-350
Source
Vaillant D.60 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 835 manual (PDF)
- Vaillant ecoMAX manual (PDF)
- Vaillant ecoMAX System 612 manual (PDF)
Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 7 July 2026