Low
S.000 on Vaillant ecoTEC plus Combi

Your boiler is currently in standby mode because it has not received a request from your thermostat or hot water timer to start heating.

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

There is no demand for heating mode.

From this model's manual
Verified against the Vaillant Ecotec Plus 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 room thermostat is set to a higher temperature than the current room temperatureEnsure your programmer or heating timer is switched to the 'on' or 'timed' settingCheck that the domestic hot water setting on the boiler or external controller is active

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Related fault codes

S.0View →S.01View →S.02View →

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