Low
D.97 on Vaillant Combi Compact 242EB

Your boiler has entered a specialist programming menu typically used by engineers to change background settings, which means it may not operate as normal until exited.

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

Activation of the second diagnostic level

DIY fix possible

Press the 'i' or 'back' button to exit the diagnostic menuTurn the boiler power off and back on again at the fused spurPress the 'Reset' button if the display does not return to normal status

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