Low
D.20 on Vaillant Combi Compact 282EB

Your boiler is currently ignoring the temperature dial because it has reached the maximum pre-set safety limit for your hot water storage.

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

Maximum set value for target cylinder

DIY fix possible

Turn the hot water temperature dial down slightlyRun a hot tap for a minute to reduce the cylinder temperatureCheck if the display returns to a standard status code after a few minutes

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Related fault codes

D.1View →D.2View →

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