Low
d.11 on Vaillant ecoTEC Plus 625

Your boiler is simply reporting that a secondary pump, responsible for circulating water through your heating system, is currently not running.

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

Status of the heating circuit's shunt pump: off/on

Shared across the range
This code is shared by the boilers in this range, which use the same control board. It may not be printed in this exact variant’s 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 heating controls are calling for heatMonitor the boiler display to see if the status changes when heating is activeNo action is required if your heating and hot water are working correctly

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Related fault codes

d.10View →F.22View →

All 170 fault codes on the ecoTEC Plus 625

Seeing a different code? Every code this model can display, in one place.

cond.00D.000d.01d.02d.04d.05d.06d.07d.08d.09d.10d.13d.14d.15d.16d.17d.18d.19d.20d.21d.22d.23d.24d.25d.27d.28d.31d.33d.34d.35d.36d.39d.40d.41d.43d.45d.47d.50d.51d.58d.60d.61d.62d.64d.65d.66d.67d.68d.69d.70F.00F.0F.01F.1F.10F.11F.12F.13F.20F.22F.23F.24F.25F.27F.28F.29F.32F.33F.49F.61F.62F.63F.64F.65F.67F.68F.70F.71F.72F.73F.74F.75F.76F.77F.78F.83F.84F.85F.86F.87F.88F.89F.91F.92F.97F22F70P.00P.0P.01P.1P.02P.2P.3P.4P.5P.06P.6P.07S.0S.01S.1S.02S.2S.03S.3S.04S.4S.05S.5S.06S.6S.07S.7S.08S.8S.10S.11S.13S.14S.15S.16S.17S.20S.21S.22S.23S.24S.25S.26S.27S.28S.30S.31S.32S.33S.34S.36S.39S.41S.42S.46S.53S.54S.88S.91S.96S.97S.98S.99S.108S.109T.02T.03T.04T.05T.06T.08

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