BoilerFaultCodesViessmann 71:0 Fault Code
Also written as 710 — same fault.
The Viessmann 71:0 fault code means: your boiler is notifying you that your hot water circulation pump is currently active based on its programmed schedule, which may be an advisory rather than a breakdown.. It appears on 5 Viessmann models in our database.
Technical description: DHW circulation pump: On according to DHW time program
What causes the Viessmann 71:0 fault?
This code is an status indicator rather than a mechanical failure, triggered when the boiler's internal clock activates the secondary hot water pump. It occurs because the system is following a pre-set schedule to ensure instant hot water is available at your taps. If you see this code when you don't need hot water, it usually means the timer settings in the control unit need to be adjusted to match your daily routine.
DIY fix possible
Check your hot water time program settings on the control panelEnsure the pump is not running during hours when it is not needed to save energyReset the boiler to see if the advisory message clears
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Gas Safe Register →Viessmann models that show the 71:0 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Viessmann 71:0 fault code information on this page is sourced and cross-checked against the official Viessmann service / installation manuals for each affected model.
Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 27 April 2026