Low
S.58 on Vaillant Combi Compact 242EB

Your boiler is temporarily limiting its power because strong wind or a blockage is interfering with how the flames burn.

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

Modulation limitation due to noise / wind error

DIY fix possible

Check the external flue terminal for obstructions like debris or nestsMonitor the boiler as this status usually clears automatically when wind speed dropsIf the code persists during calm weather, book a Gas Safe engineer to inspect the fan and flue

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Related fault codes

F.28View →

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