Low
d.41 on Vaillant ecoTEC plus aquaPLUS

Your boiler is simply displaying the current temperature of the water returning from your radiators to the unit, rather than indicating a breakdown or fault.

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

Actual return temperature

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

Press the 'i' button to exit the information menuMonitor the screen to see if it reverts to the standard pressure or temperature displayNo action is required as this is an informative status code, not an error

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