Medium
D.19 on Vaillant Combi Compact 282EB

Your boiler is having trouble managing the speed of its internal pump, which may lead to inefficient heating or your system struggling to circulate water properly.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

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This fault should be looked at by a Gas Safe engineer within the next week or two. It may get worse if left.

Technical description

Operating modes of the two speed heating pump

Engineer required

This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

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Related fault codes

D.10View →F.20View →

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