Low
D.9 on Vaillant Combi Compact 282EB

Your boiler is receiving a instruction from an external thermostat or home automation system telling it what temperature to run at.

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.

Technical description

Flow target temperature from external analogue regulator terminal

DIY fix possible

Check your external room thermostat or smart heating controls are set to the desired temperatureEnsure any external 'eBUS' or analogue controllers are powered on and connectedRestart your heating controls to refresh the signal to the boiler

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Related fault codes

D.0View →D.90View →S.31View →

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