Low
Viessmann boilers on Viessmann Vitorond 100

Your boiler is operating normally under its standard settings and there is likely no actual fault to worry about.

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.

What the manual says

Manufacturer manual

Control mode

From this model's manual
Verified against the Viessmann Vitorond 100 installation & service manual.
Plain-English guidance below. Severity, DIY steps, costs and parts are our interpretation to help you act, not text from the manual.

DIY fix possible

Check your thermostat to ensure it is calling for heatMonitor the display to see if the message changes as the house warms upConsult the user manual to confirm if a specific timer or mode has been accidentally selected

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