Low Information
58:1 to 58:95 on Viessmann Vitodens 333-F

Your boiler is notifying you that a specific setting for your hot water temperature has been manually adjusted or requested.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

Monitor it

This is a minor fault. Keep an eye on it and mention it at your next annual boiler service. Reset the boiler and see if it clears.

Technical description

Input of set DHW value 2; adjustable from 1 to 95°C (observe coding address 56)

What causes this 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

Check your hot water temperature settings on the boiler control panel or appEnsure the temperature is set to a comfortable level (typically 50-60°C)Restart the boiler to clear the notification if the setting was adjusted by mistake

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