BoilerFaultCodesViessmann 58:1 to 58:95 Fault Code
Also written as 581TO5895 — same fault.
The Viessmann 58:1 to 58:95 fault code means: your boiler is notifying you of an incorrectly set or restricted hot water temperature limit that needs adjustment in the system settings.. It appears on 5 Viessmann models in our database.
Technical description: Input of set DHW value 2; adjustable from 1 to 95°C (observe coding address 56)
What causes the Viessmann 58:1 to 58:95 fault?
This code appears because the boiler has received a manual request to change the domestic hot water temperature to a secondary set value. It is typically triggered by a user or a specific heating program adjusting how hot the water in your taps should be. Because it is an informative notification rather than a mechanical failure, it does not indicate that a part has broken.
DIY fix possible
Navigate to the boiler's control panel menuLocate the hot water temperature settingsAdjust the maximum set point to your desired temperature (typically 55-60°C)Refer to address 56 in your user manual if the setting remains restricted
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Gas Safe Register →Viessmann models that show the 58:1 to 58:95 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Viessmann 58:1 to 58:95 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