Low
d4:0 on Viessmann Vitodens 100-W / 200-W

Your boiler's heating control settings have been reset to zero, meaning it does not currently know it needs to provide heating to your home.

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

Heating curve level = 0

DIY fix possible

Access the boiler control panel menuNavigate to the Heating Curve settingsAdjust the 'Level' or 'Shift' parameter to your desired comfort setting to reactivate the heating schedule

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