Low
d.10 on Vaillant ecoTEC plus aquaPLUS

Your boiler is currently reporting whether the internal central heating pump is switched on or off.

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

Pump status

From this model's manual
Verified against the Vaillant Ecotec Plus Aquaplus 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 if your thermostat or programmer is calling for heatMonitor the display to see if the value changes from 0 (off) to 1 (on) when heating is activeNo action is required as this is an information status code, not an error

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